Analytical Chemistry Hub
Explore all 123 verified technical articles covering HPLC & GC chromatography, wet lab titrations, method validation, spectroscopic analysis, and pharmacopoeial compliance.
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⏱️ 2 min read
What are the mandatory elements of a Pharmaceutical Quality System (PQS) under ICH Q10 and Revised Schedule M?
Answer: A PQS establishes a state of control across the four product lifecycle stages (Development, Technology Transfer, Commercial Manufacturing, and Product Discontinuation). The four core enablers and management pillars are:
⏱️ 3 min read
HBEL stands for Health-Based Exposure Limit-Cleaning validation
HBEL stands for Health-Based Exposure Limit. It is a scientifically and toxicologically derived value that represents the maximum daily dose of a substance (typically an active pharmaceutical ingredient, intermediate, or cleaning agent) to which an individual can be exposed every day over a lifetime without experiencing adverse effects. In modern pharmaceutical manufacturing and cleaning validation […]
⏱️ 2 min read
What is the technical difference between an Out of Trend (OOT) and an Out of Specification (OOS), and how do you monitor them?
Answer Framework: OOS: Any analytical result that falls outside established acceptance criteria (registered specifications or compendial limits). OOT: A result that remains within registered specifications but deviates noticeably from historical batch trends, stability projection curves, or statistical process limits (e.g., beyond $\pm 3\sigma$). Approach: OOTs serve as early warning signals in stability testing or continued […]
⏱️ 3 min read
Quality Risk Management: ICH Q9(R1) Guideline
ICH Q9(R1) is the revised guideline on Quality Risk Management (QRM) adopted by the International Council for Harmonisation (ICH) to improve how the pharmaceutical industry applies risk management principles throughout the product lifecycle. While the fundamental core framework of the original ICH Q9 remains intact, Revision 1 (R1) directly targets four major problem areas identified […]
⏱️ 2 min read
Q1: How do you lead an Out of Specification (OOS) investigation from the QA perspective, particularly when QC finds no lab error?
Answer Framework: Phase I (Laboratory Investigation): Verify that the analyst followed standard test methods, instrument parameters were within calibration, solutions/standards were valid, and chromatograms/system suitability met criteria. Phase II (Manufacturing / Root-Cause Investigation): If Phase I identifies no clear laboratory error, open a Phase II cross-functional investigation. Examine the batch manufacturing record (BMR), equipment logs, […]
⏱️ 2 min read
How do you lead an Out of Specification (OOS) investigation from the QA perspective, particularly when QC finds no lab error?
Answer Framework: Phase I (Laboratory Investigation): Verify that the analyst followed standard test methods, instrument parameters were within calibration, sol...
⏱️ 37 min read
UV-Visible Spectrophotometer Calibration — SOP-Based Interactive Lab Game
The player enters a realistic virtual laboratory where they must first read and understand the SOP, verify the instrument and reference standards, perform each calibration test in the correct sequence, record observations, evaluate acceptance criteria, and finally determine whether the instrument is suitable for routine use.
⏱️ 3 min read
Pharmacopoeia Update: Why Regular Pharmacopoeia Revisions Are Important for the Pharmaceutical Industry
Introduction A pharmacopoeia update plays an important role in the pharmaceutical industry. New standards are released regularly to improve the quality, safety, and effectiveness of medicines. These updates should be reviewed carefully by pharmaceutical manufacturers, quality control laboratories, and regulatory professionals. Understanding the latest pharmacopoeia revisions helps companies remain compliant with regulatory requirements and maintain […]
⏱️ 2 min read
Just finished a fun session of HPLC calibration! Time to unwind and rambler a bit about my day.
Play remember all HPLC calibration link given below free Headline: Stop Memorizing HPLC SOPs. Start Mastering Them. 🎮🧪We’ve all spent hours poring over SOPs, trying to visualize every step of the HPLC calibration process. But what if you could practice the entire workflow in a risk-free, digital environment? I’m excited to share a project I’ve […]
⏱️ 3 min read
Dissolution investigation
In pharmaceutical quality control, when a product fails the S1 stage of dissolution (like the 78% result in your example), you don't just blindly move on to testing more units at the S2 stage. The very first action in an Out of Specification (OOS) or atypical result investigation is to **"Check the product history."** Here […]
⏱️ 3 min read
RCA (ROOT CAUSE ANALYSIS) IN PHARMACEUTICAL INDUSTRIES
RCA (ROOT CAUSE ANALYSIS) IN PHARMACEUTICAL INDUSTRIES AS PER REGULATORY REQUIREMENTS 1. PROBLEM IDENTIFICATION What Happens Clearly define the deviation, OOS, OOT, complaint, breakdown, audit observation, or incident. Includes Deviation description Date & time of occurrence Product/Batch details Area/Department involved Immediate impact assessment Initial containment action 2. DATA COLLECTION What Happens Gather all relevant information […]
⏱️ 2 min read
summary of global nitrosamine regulations FDA, EMA, ANVISA, SWISSMEDC, HEALTHCANDA.
* Nitrosamines are trace chemical impurities. * They are classified as probable human carcinogens. * Global agencies require a strict 3-step risk assessment framework. * Manufacturers must evaluate, test, and fix any impurity risks. 1. The Global CPCA SystemAgencies use the **Carcinogenic Potency Categorization Approach (CPCA)** to set safety limits. This system groups impurities into […]
⏱️ 2 min read
Understanding Analytical Method Validation: Interference and Specificity
This concept is essential in scientific analysis. When you create a method to measure something (like a drug or a chemical), you must prove that the method only measures that specific substance and isn't being 'fooled' by other things in the mixture.
⏱️ 5 min read
Troubleshooting Retention Time Shift in HPLC: Causes, Solutions, and Best Practices
If you run high-performance liquid chromatography (HPLC) assay, you know that consistency is everything. In a validated method, your retention time (RT) should remain rock-steady from injection to injection. But every chromatographer eventually faces that frustrating moment when the peaks start drifting. Suddenly, you are dealing with:System suitability failuresIncorrect peak identificationsImpurity mismatchesTime-consuming laboratory investigations and […]
⏱️ 2 min read
Global Regulatory Pulse
Weekly Regulatory Highlights (June 1–3, 2026)
🇺🇸 FDA Updates 🇪🇺 EMA Updates 🇮🇳 CDSCO Updates 📅 Compliance Watchlist ⚠️ Risks & Considerations Reference drug.com
⏱️ 2 min read
Key FDA Updates (Late May–Early June 2026)
The FDA’s latest updates (June 2026) include several new drug approvals, safety warnings on hidden ingredients in supplements, and upcoming regulatory decisions on therapies for COVID-19, urinary tract infections, smoking cessation, and kidney disease. These developments highlight both immediate consumer safety concerns and major advances in oncology and infectious disease treatments.") — 🔑 Key FDA […]
⏱️ 2 min read
Method validation pharma environment
Breakdown of Table 1-1 (Validation Requirements) The table in the document shows which validation qualities are needed for different types of tests:
⏱️ 2 min read
Key Pharmacopoeia Updates 2026
These updates are quite significant because they reshape compliance expectations across different regions and therapeutic areas. Let me break down where the impact is most pronounced: 🌍 Key Pharmacopoeia Updates– Indian Pharmacopoeia 2026 – 121 new monographs, especially in anti-tubercular, anti-diabetic, and anti-cancer drugs. – First-time inclusion of blood component monographs for transfusion […]
⏱️ 2 min read
Audit Trail Features pharma, life sciences
🚀 Building Compliant LIMS Software: Key Audit Trail FeaturesDesigning a pharmaceutical LIMS requires a relentless focus on data integrity, 21 CFR Part 11 compliance, and ALCOA+ principles. Here are the core audit trail features I'm prioritizing for our software modules:Immutable Metadata Logging: Automatically capturing the "Who, What, When, and Why" for every data entry, ensuring […]
⏱️ 2 min read
The International Council for Harmonisation (ICH) Q4 series is a milestone in global regulatory collaboration.
🌍 Harmonizing Pharmaceutical Quality Testing: ICH Q4 Guidelines The International Council for Harmonisation (ICH) Q4 series is a milestone in global regulatory collaboration. 🔹 Core Guideline (Q4B): Establishes the process for evaluating pharmacopoeial texts across the US, EU, and Japan. Once deemed equivalent, these methods are officially interchangeable. 🔹 Annexes (Q4B-1 to Q4B-14): Cover essential […]
⏱️ 6 min read
Navigating TGA Compliance: Your Friendly Guide to Analytical Method Validation in Sydney
The pharmaceutical and biotechnology sectors in New South Wales are experiencing an incredible boom. From the bustling research hubs in Macquarie Park and Westmead to the clinical trials happening across Randwick, local innovators are developing next-generation therapeutics. However, bringing a brilliant new molecule or drug formulation from the laboratory bench to the Australian market requires […]
⏱️ 2 min read
Cómo Crear PNTs a Prueba de Auditorías: La Lista de Verificación Definitiva de QA
Escribir un Procedimiento Normalizado de Trabajo (PNT / SOP) no es solo plasmar palabras en un papel; es construir un escudo de cumplimiento para tu planta. Un PNT mal redactado es la causa directa de desviaciones, errores humanos y dolores de cabeza durante las auditorías de la #MHRA o la #FDA. 🛡️Ya sea que estés […]
⏱️ 3 min read
Optimización del análisis HPLC para el control de calidad farmacéutico
En el competitivo entorno de las empresas farmacéuticas modernas, garantizar la calidad precisa del producto no es solo un requisito regulatorio: es la base de la seguridad del paciente. En el corazón de este aseguramiento de la calidad se encuentra el análisis HPLC (Cromatografía Líquida de Alta Eficiencia), una técnica analítica potente utilizada para identificar, […]
⏱️ 3 min read
Out of specification top five questions and answers pharma
Can we average an OOS result with passing retest results to get a passing average? A: Absolutely not. Both FDA and MHRA guidelines strictly prohibit averaging an OOS result with passing retests to "hide" the failure or bring the batch into compliance. Averaging hides the inherent variability of the product. If a retest is performed […]
⏱️ 6 min read
Strategic Guide: Managing OOS Investigations in Pharmaceutical Quality Control with real example
An Out of Specification (OOS) investigation is a critical regulatory requirement in the pharmaceutical industry. When an analytical result falls outside the est...
⏱️ 2 min read
How to Identify Duplicate Raw Material Samples in Pharmaceutical Quality Control
Duplicate raw material samples is critical for maintaining data integrity, ensuring cGMP compliance, and optimizing laboratory workflow efficiency. Duplicate samples often occur due to manual entry errors, mislabeling, or poor communication between the warehouse sampling team and the quality control laboratory. Implementing a systematic verification process is the most effective way to detect and eliminate […]
⏱️ 3 min read
Fundamentals & Principles of HPLC
HPLC Fundamentals & Principles | Interactive Study Guide What is the basic principle of HPLC? The separation of components in a mixture based on their different distributive behaviors between a liquid mobile phase and a solid or liquid stationary phase. What are the main components of an HPLC system? The system consists of: Solvent reservoir, […]
⏱️ 3 min read
Optimize my raw material flow sheet for better pharmaceutical compliance
To optimize a raw material (RM) flow sheet for pharmaceutical compliance, the process must transition from a simple sequence to a data-integrity-focused workflow. In a GxP environment, every step must ensure traceability, prevent cross-contamination, and enforce "Quality by Design."Below is an optimized flow structure designed to meet ALCOA+ principles and typical regulatory expectations (like those […]
⏱️ 2 min read
jobs outside of India requires looking at specific global platforms
Finding pharmaceutical jobs outside of India requires looking at specific global platforms that specialize in life sciences. Since you have experience in Quality Control (QC), you can find many opportunities in manufacturing hubs like the USA, Europe (Germany, Ireland, UK), and Singapore. Here are the best job platforms and strategies for your international search:Global Pharma […]
⏱️ 2 min read
HPLC columns classification
HPLC columns are classified in the United States Pharmacopeia (USP) under the “L” designation system, with each type assigned a specific USP code (e.g., L1, L3, L7). The main USP chapter that governs chromatography, including HPLC columns, is USP Chromatography, which provides detailed guidance on column selection, performance, and validation. 📖 USP Chapter Reference 🔬 […]
⏱️ 3 min read
HOW TO DOCUMENT REACHED METHOD DEVELOPMENT- PHARMA
1. Define the Purpose and Scope Establish the method's objective before you begin writing. Method Title: Assign a descriptive name (e.g., "HPLC Method for the Quantification of Paracetamol in Tablets"). Objective: State exactly what the method achieves. Identify the analyte, the matrix, and the reason for the measurement. Scope: Define the application range. Specify which […]
⏱️ 12 min read
Method Validation Vs System suitability Way to Understand weds story - Pharma
What a Wedding Day Can Teach You About Perfect Lab Results 1. Introduction: The Universal Language of Analogy Have you ever felt locked out of a conversation by technical jargon? Science, in particular, can feel like an intimidating world of its own. But the truth is, even the most complex ideas can be unlocked with […]
⏱️ 5 min read
4 Surprising Truths About 21 CFR: The Obscure Rulebook That Governs Global Medicine
Introduction: Cracking the Code The pharmaceutical industry is filled with complex jargon and acronyms that can be intimidating to outsiders and newcomers alike. One term that frequently appears is "21 CFR," a seemingly cryptic code that holds immense weight in the world of medicine. Contrary to its technical appearance, this term is surprisingly simple to […]
⏱️ 3 min read
Laboratory Incident Report
Incident Number: LAB-2025-012 Date of Incident: December 19, 2025 Product Name: Azithromycin (Finished Product) Batch Number: 33334562222 Test: Related Substances (RS) by HPLC Analyst Name: Anil Patel (ID: 5122) I. Incident Description During the HPLC analysis of Azithromycin Finished Product (Batch No: 33334562222), an Out-of-Trend (OOT) result was observed. The Standard Area was found to […]
⏱️ 3 min read
Incident, Deviation,OOS,OOT describes
Detailed Breakdown 1. Deviation 2. Incident 3. OOS (Out of Specification) 4. OOT (Out of Trend) Summary of the Relationship You can visualize the flow of these problems as follows: Would you like me to explain the specific "Phase I vs. Phase II" investigation steps required when you get an OOS result?
⏱️ 3 min read
Detailed Regulatory Nuances
1. EDQM / EU GMP (Europe) 2. FDA / 21 CFR (United States) 3. USP (US Standards) Summary of "USFC" Ambiguity If "USFC" was intended to mean "US Food Code", the deviation process is entirely different (HACCP-based). If it referred to a specific company or internal standard, the above chart uses USP as the industry-standard […]
⏱️ 3 min read
OOS AS PER FDA
The OOS FlowchartPhase I: Laboratory Investigation(Did the Lab make a mistake?) [ START: OOS Result Detected ] | v[ Notify Supervisor Immediately ] | v[ CHECK: Is there an obvious Lab Error? ](Calculation error, power failure, spilled sample, wrong instrument) | +———————–+ | | [ YES ] [ NO ] | | v v[ Invalidate […]
⏱️ 3 min read
Description of Incident
The High-Performance Liquid Chromatography (HPLC) sequence was interrupted unexpectedly during a scheduled run.
Analysis in Progress:
A sequence of 15 samples (ID: LIR-20251123-A) was being run for the quantitative analysis of [Specify Compound/Analyte] in [Specify Matrix, e.g., pharmaceutical tablet, environmental water sample]. The sequence included standards, blanks, and quality control (QC) samples.Point of Interruption: The interruption occurred during the analysis of the 7th sample (ID: LIR-20251123-A-07), approximately 3 hours into the […]
⏱️ 2 min read
Specificity analytical method validation creative way to understand
Specificity analytical method validation creative way to understand Imagine analytical method validation as building a highly specialized "detection machine" for a specific target. Specificity is about ensuring your machine only detects your intended target and nothing else. It's like having a perfectly tuned metal detector that only beeps for gold, ignoring all other metals, rocks, […]
⏱️ 4 min read
Iodimotry titration story way to understand
Imagine you're a detective, and your mission is to find out exactly how much of a sneaky, hidden chemical called an "oxidizing agent" is present in a mysterious solution. You can't see it, you can't smell it, but you know it's there, lurking.Your secret weapon in this investigation is a titration. Think of it like […]
⏱️ 4 min read
Complexometry titration
Complexometric titration, also known as chelatometry, is a type of volumetric analysis that relies on the formation of a colored complex to indicate the endpoint of a titration. This method is particularly useful for determining the concentration of metal ions in a solution, especially in mixtures.Here's a breakdown of its key aspects:PrincipleThe fundamental principle of […]
⏱️ 5 min read
Before use karl fischer titration care
"Care before use" in Karl Fischer titration refers to the crucial steps and considerations taken before starting the actual titration process to ensure accurate, reliable, and safe results. Given that Karl Fischer titration is highly sensitive to moisture, these pre-analysis precautions are paramount.Here's a breakdown of the key "care before use" aspects:1. Instrument and Setup […]
⏱️ 12 min read
Analytical method validation other concepts
Understood. "Analytical image method validation" refers to the process of ensuring that image-based methods used for quantitative or qualitative analysis consistently produce reliable, accurate, and fit-for-purpose results. This is crucial in fields like pharmaceuticals, materials science, environmental monitoring, and medical diagnostics, where image data drives critical decisions.Here's a comprehensive set of guidelines for validating analytical […]
⏱️ 5 min read
Uv analysis sop in pharma
This sounds like you're looking for a Standard Operating Procedure (SOP) for Ultraviolet (UV) analysis. Here's a general outline of what a comprehensive SOP for UV analysis would typically include. Keep in mind that the specific details will vary depending on the instrument model, the type of analysis being performed, and your laboratory's quality system […]
⏱️ 2 min read
Specificity analytical method validation
According to the International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use (ICH) guideline Q2(R1), specificity is defined as:"Specificity is the ability to assess unequivocally the analyte in the presence of components which may be expected to be present."This means that a specific analytical method should be able to measure the target […]
⏱️ 5 min read
Uv development
UV development can refer to several distinct areas, primarily revolving around ultraviolet (UV) light and its applications. To provide a comprehensive answer, let's explore these different facets:1. UV Spectroscopy Method DevelopmentThis involves creating and validating analytical methods that utilize UV-Visible (UV-Vis) spectroscopy. UV-Vis spectroscopy is a technique that measures the absorbance and transmittance of UV […]
⏱️ 3 min read
Uv analysis in pharma
"UV analysis" most likely refers to Ultraviolet-Visible (UV-Vis) Spectroscopy. This is a widely used analytical technique that studies how substances interact with ultraviolet and visible light.Here's a breakdown of what UV-Vis analysis entails:Principle: * UV-Vis spectroscopy measures the absorbance or transmittance of light through a sample as a function of wavelength. * When UV or […]
⏱️ 2 min read
Karl fischer titration
"Kal Fischer" most likely refers to Karl Fischer Titration.Karl Fischer titration is a well-established chemical method used to determine the water content of a wide variety of samples. It's a common technique in many industries, including: * Food and beverage: To measure moisture in things like flour, honey, and oils, which affects quality and shelf […]
⏱️ 5 min read
How to Analytical Method validation Planing
Ah, method validation planning in pharma – a cornerstone of ensuring the quality and reliability of pharmaceutical products! It's all about demonstrating that your analytical methods are fit for their intended purpose.To get started with effective method validation planning, here are some key aspects to consider:1. Defining the Scope and Objectives: * What method are […]
⏱️ 4 min read
How to measure OOT IN pharmaceuticals industry
Out-of-Trend (OOT) in Pharmaceutical StabilityIn the pharmaceutical industry, Out-of-Trend (OOT) results refer to analytical data obtained during stability studies that, while still within the established specification limits, deviate significantly from the expected historical trend or previous results for the same product. These deviations can be an early indicator of potential issues with product quality, manufacturing […]
⏱️ 4 min read
Stability sample Labeling procedure as per guidelines in pharmaceuticals industry
To ensure proper management and traceability of samples undergoing stability studies in a pharmaceutical setting in Surat, Gujarat, India, the labels on these samples must contain specific information. These labels are critical for identifying the samples, their storage conditions, and the time points for analysis. Here's a breakdown of the key elements that should be […]
⏱️ 4 min read
Stability sample charges as per guidelines
1. Charging Samples to a Stability Study (Initiation):In the pharmaceutical industry, "charging" samples to a stability study refers to the process of formally placing representative samples of a drug substance or drug product into controlled storage conditions (e.g., specific temperatures and humidity levels) according to a predefined stability protocol. This is the starting point of […]
⏱️ 2 min read
Heavy metal -B
Method B in heavy metal testing is used for substances that do not yield clear, colorless solutions when tested under Method A. It involves reacting the sample with hydrogen sulfide or sodium sulfide to form colored metal sulfides, which are then compared to a standard lead solution to determine if the sample meets the limit […]
⏱️ 2 min read
Heavy metal Method -A
heavy metals in a substance. It involves reacting the substance with hydrogen sulfide (or sodium sulfide) to produce colored heavy metal sulfides, which are then compared to a standard lead solution. The test ensures that the sample does not exceed a specified heavy metal limit, typically 20 parts per million (ppm). Here's a more detailed […]
⏱️ 2 min read
Heavy metal analysis
measures the fluorescence emitted by atoms in a sample excited by a light source. X-ray Absorption Spectroscopy (XAS): XAS provides information about the chemical form of heavy metals in a sample. Sample Preparation:Before analysis, samples (e.g., soil, water, biological tissues) often require preparation to ensure proper analysis. This may involve digestion (e.g., using acids or […]
⏱️ 3 min read
HPLC PUMP TROUBLESHOOTING
HPLC (High-Performance Liquid Chromatography) pump issues can significantly impact the performance and reliability of your chromatographic analysis. Here are some common problems and potential solutions: Common Issues: Troubleshooting Steps: Potential Solutions: Preventative Measures: By following these troubleshooting steps and implementing preventative measures, you can minimize HPLC pump issues and ensure reliable and efficient chromatographic analysis. […]
⏱️ 2 min read
According to EP genyeral chapter balance classification
Prison balance Analytical balance Semi micro balance Micro balance Ultra Micro balance
⏱️ 2 min read
HPLC METHOD DEVELOPMENT
HPLC (High-Performance Liquid Chromatography) method development is a critical process in analytical chemistry, involving the creation of a precise and reliable method for separating, identifying, and quantifying the components of a mixture. Here's an overview of the HPLC method development process: 1. Method Development ObjectivesDefine the purpose of the analysis, the target analytes, and the […]
⏱️ 2 min read
Out of specification Investigation Step in pharmaceutical
Scope Input Martial In process stage Finish product Stability Note : Not applied in process stage which give procedure Further operation (e.g like give option in BMR if result not found as per Limit and further go operation e.g CF drying sample) Purpose: Ensure that product safe Find the root case of OOS Minimize the […]
⏱️ 2 min read
Which is best solvent between Methanol vs Acetonitrile in HPLC
Share this: Click to share on Facebook (Opens in new window) Facebook Click to email a link to a friend (Opens in new window) Email Click to share on Reddit (Opens in new window) Reddit More Click to share on X (Opens in new window) X Click to share on LinkedIn (Opens in new window) […]
⏱️ 6 min read
analytical method validation for pharmaceutical quality control
Type of analytical procedure validated Identification tests. Quantitative tests for impurities' content. Limit tests for the control of impurities. Quantitative tests of the active moiety in samples of drug substance or drug product or other selected component(s) in the drug product 1. Identification tests. First Parameter show Identification Lets Explains First show in Fig […]
⏱️ 4 min read
Type of HPLC column
In HPLC chromatography, the column is where the separation of the sample takes place. This is where the sample is passed through the stationary phase with the mobile phase, resulting in the separation of the sample components. As the sample being analyzed is likely to vary in terms of its chemical and physical properties, therefore […]
⏱️ 2 min read
621 no chapter chromatography was update at on date 1-dec-2022
What is update change Definitions Here Definitions and chromatograms both unified and give title Definitions Give method dwell volume determine being added Definitions add definitions size-exclusion chromatography (Distribution constant, Retention time of an unretained compound, Total mobile phase time) Also other definitions plate height, reduced plate height, plate number etc In TLC – resolution calculation […]
⏱️ 2 min read
Latest pharmacopoeia
USP 44-NF 39, which became official on November 1, 2021. Share this: Click to share on Facebook (Opens in new window) Facebook Click to email a link to a friend (Opens in new window) Email Click to share on Reddit (Opens in new window) Reddit More Click to share on X (Opens in new window) […]
⏱️ 2 min read
Type of Compartment of HPLC & GC ?
HPLC Going into more detail, HPLC consists of a variety of components, including a solvent delivery pump, a degassing unit, a sample injector, a column oven, a detector, and a data processor. GC GC uses an inert or unreactive carrier gas as the mobile phase, and the stationary phase is generally a thin layer of liquid. As […]
⏱️ 3 min read
How to Re-test defined in finish product in pharma
In the pharmaceutical industry, a "finished product retest" refers to the process of evaluating a sample from a previously manufactured and packaged pharmaceutical product to assess its quality, safety, and efficacy. The purpose of the retest is to ensure that the product remains within the specified standards and meets all the required regulatory guidelines. Here […]
⏱️ 2 min read
Type of stability and its effect drug product in pharma industry
Comprehensive analytical chemistry guide, theoretical principles, laboratory procedures, and pharmaceutical testing insights.
⏱️ 3 min read
OOS- Out of Specification Investigation - Interview Question and Answer
Do we need to raise an OOS, if OOS result is observed during API Method transfer First defined which lab mean by At receiving lab At originating lab YES Required Caution: inform API vendor about failure Investigation release analysis Assess impact on DP(drug product) where said API is used At receiving lab No Required Investigation […]
⏱️ 6 min read
(621) USP CHAPTER FOR CHROMATOGRAPHY
All chapter are use full for ADJUSTMENT of chromatography, TLC etc In such case some questions arias that Why adjustment in chromatography ? How adjustment justified ? Adjust chromatography If your method is validated and method are submitted in DMF so [Different lab may different working processer different instrument, column manufacture different may be fail […]
⏱️ 5 min read
ALCOA to ALCOA Plus Plus for Data Integrity in pharma guideline
-Attributable,- Legible, – Contemporaneous,- Original,- Accurate, – Complete, – Consistent,- Enduring, – Available and data integrity topic
⏱️ 2 min read
How can read Protocol analyst wet lab or Chemical analysis
○ Whenever supervisor give work allocation for testing any product.○ Then careful read specification(SOP) not missing any point which is defied in sop○ Before start analysis glassware collect in try ○ Labelling of each glassware ○ Seen availability chemicals and working standard which sufficient quantities available or not ○ Instrument calibration check is it ok○ […]
⏱️ 2 min read
Analyst do some most common error ? How care and prevent QMS activity
Wet Lab analyst do Error ! Wet lab analyst are forgot a taken out of LOD or sulphated Ash, weight forgotten, etc ! . Some dilution error !. Weight print are not past in work sheet OR analytical work report or protocol etc (whatever terminology used). ! Calibration status not seen of instrument and do […]
⏱️ 2 min read
How can read Protocol analyst
Comprehensive analytical chemistry guide, theoretical principles, laboratory procedures, and pharmaceutical testing insights.
⏱️ 2 min read
How can read Protocol analyst During HPLC analysis and what Is flow ?
• HPLC Analyst ○ Whenever supervisor give work allocation for testing any product. ○ HPLC analyst first seen Test which is Assay by HPLC or RS By HPLC, Chiral test etc ○ Then careful read specification(SOP) not missing any point which is defied in sop ○ Then Seen Which system are allocated for analysis ○ […]
⏱️ 2 min read
Chromatography
Comprehensive analytical chemistry guide, theoretical principles, laboratory procedures, and pharmaceutical testing insights.
⏱️ 2 min read
Potentometry titration
Comprehensive analytical chemistry guide, theoretical principles, laboratory procedures, and pharmaceutical testing insights.
⏱️ 2 min read
How do you perform a potentiometric titration?
The analyte is typically an acid or a base. The titration is performed by adding a measured volume of the standard solution to the sample solution, and then measuring the resulting change in the electrical potential (potential) of the solution. Quality control department Potentiometric titration App
⏱️ 2 min read
Guideline value- ICH Q1A for stability study
Guideline value- ICH Q1A for stability study
⏱️ 2 min read
Interview questions and answers karl Fischer titration
Guide line935 USP Type Karl Fischer titrationColoarimatry and volumetry titration Colarimatry titration because use of a electromagnetic filed Volumetric titrationThere is a manually titration (classical method like In burette fill kf reagent and conical flask fill a Methanol see the end point straw yellow colour) KF Reagent It is a dark brown colourPhotosensitiveMoisture sensitive so […]
⏱️ 2 min read
Why only Water & Sodium Tatrate Is Use For Calibration Of Karl Fischer Titrator?
DST is primary standard and it is stable up to 150 degree Centigrade. It release free water molecules easily when reacts with KF reagent.DST is easily soluble in methanol. This DST has 15.66% water molecules so we can easily calculate and standardize the KF reagent. We use the factorof DST the compound which has less […]
⏱️ 2 min read
Sulphate Ash Calculator app, use for pharmaceutical, analytical chemistry,interview
Learn scientific techniques and practical tips and tricks, which will help you to improve the output of your experiment particular in Analytical chemistry, Organic chemistry, and physical chemistry Application download given link Sulphate Ash- (Wet lab Calculator) Download It is very easy to work in In – Process calculation, Raw Material and Finished Product Calculation. […]
⏱️ 2 min read
Analytical method validation (before requirements)
• the requirements of the measurement procedure• scope of experiments• RM to be used• Equipment• Statistical tools to be used• personnel for performing experiments and evaluating obtainedresults Analytical method validation
⏱️ 3 min read
Top 10 Chemistry Interview Questions and Answers (2023)
1.What is general chapter balance TWO general chapter 1) USP41 2) USP1251 2. What is EDQM full from European Directorate for the Quality of Medicines & HealthCare. 3. HPLC vial size and how much injection taken? 2 ml vial and 800 micro liter Injection taken hplc 4. Analytical Method validation chapter No Chapter no <1225> […]
⏱️ 2 min read
Why does Acetonitrile use in HPLC Method development?
it is miscible with water, has good eluotropic strength and also low viscosity alone and mixed with water. Acetonitrile high-sensitivity analysis with UV detection in the short-wavelength region. However , organic solvents which have been processed for HPLC IN UV-absorbent impurities and residual metals removed Effective Acetonitrile in HPLC COLUMN Column Pressure Absorption Spectrum Elution […]
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Precision Type
Comprehensive analytical chemistry guide, theoretical principles, laboratory procedures, and pharmaceutical testing insights.
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Method validation guidelines and chapter
• Ich Q2(R1) guidelines • 〈1224〉 TRANSFER ANALYTICAL PROCEDUR • (Transfer between laboratory to laboratory) • <1225>VALIDATION OF COMPENDIAL PROCEDURES Chromatography focus this chapter • <1226>VERIFICATION OF COMPENDIAL PROCEDURES Method suitable and time implement <1210>STATISTICAL TOOLS FOR PROCEDURE VALIDATION
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Accuracy - Analytical method validation, hplc, pharmaceutical
Accuracy is also part of method validation different place Different terminology used for accuracy like recovery, truth value, biaus etc
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Accuracy in method validation?
When you archery your arrow is how much near by target call Accuracy Precision in method validation? How many arrow 🏹 Near close with each other call precision
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What is polarize light?
Polarized light waves are light waves in which the vibrations occur in a single plane. The process of transforming unpolarized light into polarized light is known as polarization. There are a variety of methods of polarizing light. Instruments
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What is different between ODS and BDS column in hplc?
ODS column contains FREE -OH group in silica BDS column contains DEACTIVATE -OH group in silica
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Process validation guidelines As per ICH
Comprehensive analytical chemistry guide, theoretical principles, laboratory procedures, and pharmaceutical testing insights.
⏱️ 2 min read
What is dead volume in HPLC?
Elute are found from initial column to detecter call dead volume #HPLC #GC #IR #autotitration #ph #conductometry #calibration #calibrationHPLC #highperformanceliquidchromatography #detector #detectorsusedinhplc #detectorsusedgc #gaschromatography #principle #TLC #thinlayerchromatography #chromatography #mobilephase #column #ionexchange #titration #titrationtypes #ichguidelines #stability #validation #analyticalchemistry #chemistry #interview #quotation #analyticalmethodvalidation #mobilephasecalcualation #analyticalchemistry #validation #analyticalvalidation #FTIR #IR #chemicalbond #Troubleshooting #HPLCTroubleshooting #normality #molarity
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How can handle unexpected events?
DIN (documents incident) IncidentDeviationOOS DIN Documentary error like miss date and sign, entry missed in logbook, Incident Like power failure, peak shape not properly, baseline not properly et OOS Results was not found as per specification
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What is general chapter for GC(as per USP)?
general chapter is 621
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Q: What critical data must be compiled in an Annual Product Quality Review (PQR)?
Product Quality Review (PQR / APQR)
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⚗️ Small pH change, big retention time shift in HPLC!
Excellent explanation — that’s a textbook‑level breakdown of how subtle pH variations influence retention time in HPLC. You’ve covered analyte ionization, silanol ⚗️ Small pH change, big retention time shift in HPLC! A minor pH tweak can drastically alter analyte and stationary phase ionization — shifting retention time Rand peak shape. 🔹 Analyte Ionization (pKₐ […]
⏱️ 2 min read
FDA Propose Rule That Would Help Hold Foreign Tobacco Manufacturers Accountable, Protect Public Health
product dimensions. For e-cigarettes, manufacturers would also need to provide specifications such as e-liquid volume, battery capacity, and wattage. To streamline and increase efficiency, in most cases manufacturers would be required to submit information electronically through the FDA’s online system, enabling them to register more quickly. They would also be required to review and update […]
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Maximizing Efficiency in Modern Quality Control Labs
Operational excellence is demanded by modern quality control laboratories. Every single day, high testing volumes are managed by laboratory analysts. Accuracy must be maintained during complex testing procedures, including HPLC analysis and Karl Fischer titration. When workflows are optimized, regulatory compliance is easily achieved by pharmaceutical professionals.The Importance of Process StandardizationStandardized testing protocols are utilized […]
⏱️ 3 min read
QMS – CAPA MODULE
STEP-BY-STEP PROCEDURE 1. PURPOSE To describe the steps for initiation, investigation, implementation, effectiveness check and closure of Corrective and Preventive Actions (CAPA) in QMS to ensure product quality and compliance with regulatory requirements. 2. SCOPE This procedure applies to all CAPAs arising from all GxP activities within the organization including manufacturing, QC, QA, engineering, warehouse, […]
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Optimizing HPLC Analysis for Pharmaceutical Quality Control
In the competitive landscape of modern pharmaceutical companies, ensuring precise product quality isn't just a regulatory requirement—it is the foundation of patient safety. At the heart of this quality assurance is HPLC analysis (High-Performance Liquid Chromatography), a powerful analytical technique used to identify, quantify, and separate components in a mixture.To maximize the efficiency of your […]
⏱️ 2 min read
The Professional Personality and Behavior of a Pharmaceutical QC Analyst
A unique set of behaviors and personality traits is required for a Quality Control (QC) Analyst. These traits are essential to ensure that every medicine is manufactured safely. The following descriptions outline the key characteristics of a successful professional in this field.Unwavering Integrity and HonestyThe safety of the patient is always placed first by a […]
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Fourier Transform Infrared Spectroscopy (FTIR) is widely used in analytical method development
Fourier Transform Infrared Spectroscopy (FTIR) is widely used in analytical method development because it provides rapid, sensitive, and eco‑friendly characterization of pharmaceutical substances, excipients, and formulations. It is especially valuable for fingerprinting Active Pharmaceutical Ingredients (APIs) and validating methods without the need for solvents. — What FTIR Offers in Method Development– Speed & Accuracy: […]
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Market complaint handling in pharma company
A market complaint in the pharmaceutical industry refers to dissatisfaction expressed by customers (which can include patients, retailers, wholesalers, or doctors) regarding the quality, safety, or other aspects of a pharmaceutical product. These complaints can be received verbally or in written form.Here's a breakdown of how market complaints are typically handled in the pharmaceutical sector […]
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Chromatography 621 number chapter adjustment parameters is 81) Ph
2) injection volume
3) Temperature
4) buffer Concen
5) Column
6) Mobile phase ratio
7) Wave leny
8)Flow rate
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Parts per million (ppm) is a way of expressing very dilute concentrations of substances
Parts per million (ppm) is a way of expressing very dilute concentrations of substances. To calculate ppm, you can use the following formulas depending on what information you have
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Theoretical Plates chromatography-analytical chemistry
Theoretical Plates chromatography In chromatography, theoretical plates are a fundamental concept used to assess the separation efficiency of a chromatographic column. They play a crucial role in determining the quality and effectiveness of the chromatographic separation. In this section, we will define theoretical plates, explain their significance in assessing separation efficiency, and discuss the analogy of […]
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21 cfr
21 CFR stands for Title 21 of the Code of Federal Regulations. It is a set of regulations issued by the United States Food and Drug Administration (FDA) that covers various aspects of regulatory requirements for pharmaceuticals, medical devices, food, cosmetics, and other products governed by the FDA. The regulations within 21 CFR are designed […]
⏱️ 3 min read
Difference class A and class b glassware use in laboratory
The terms "Class A" and "Class B" are commonly used to describe different types of glassware in laboratory settings, particularly for volumetric measuring. These classes have specific standards and tolerances, and they serve different purposes. Here's the difference between Class A and Class B glassware: Class A Glassware: Class A glassware is of higher precision […]
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Describe glassware types used in laboratory
Laboratories use various types of glassware to perform experiments, conduct measurements, and handle substances safely. Some common types of glassware used in laboratories include: Beakers: Cylindrical containers with a flat bottom and a spout used for holding and mixing liquids. They come in various sizes. Erlenmeyer Flasks: Conical-shaped flasks with a flat bottom and a […]
⏱️ 3 min read
Type of Glassware use in pharmaceutical and chemical, pasticised industry
In the pharmaceutical industry, glassware is also classified based on its quality and accuracy, much like the Class A and Class B classifications commonly used in laboratory glassware. The classification of glassware in pharma is typically based on standards set by regulatory authorities like the United States Pharmacopeia (USP) and the European Pharmacopoeia (Ph. Eur.). […]
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Pilot batch sample has been taken to stability.
No Only manufacturing area or production batch taken as stability Share this: Click to share on Facebook (Opens in new window) Facebook Click to email a link to a friend (Opens in new window) Email Click to share on Reddit (Opens in new window) Reddit More Click to share on X (Opens in new window) […]
⏱️ 2 min read
Which pharma Aqueous product give bring more water loss 60℅Rh OR 90℅ Rh
It's 60℅ Rh because (100 – 60 = 40 ℅ loss water (100-90 = 10 ℅ loss water Here 100 is in side containers water Inside container concentration might be different but, it's water remain 100 ℅ Share this: Click to share on Facebook (Opens in new window) Facebook Click to email a link to […]
⏱️ 2 min read
what is Intermediate, Accelerated, Long term testing-stability
Accelerated testing Increase the rate of chemical or physical change of drug product by using exaggerated condition as part of formal stability study. Intermediate testing conducted as at 30°C/65% designed to moderately increase the rate of chemical or physical changes for drug product to be stored at 25°C Long term testing under recommended storage conditions […]
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Forced degradation(stress testing) and accelerated stability testing are same?
Here both are the different Accelerated stability testing only 40°C/75 RH Study here time period are 1,3,6,12 Each batch perform Accelerated stability study Here we have to seen that naturally degraded drug product which is covered According to WHO guidelines storage condition of climatic zone IVa and zone IVb? Zone IV a: 30°C and 65% […]
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Type of buffer in Hplc
Phosphate buffer Citrate buffer Formate buffer Acetate buffer Tris(hydrixymethyl) -aminomethane Phosphate buffer Pka 2.1 Ph range 1.1 tob3. 1 Pka 7.2 Ph range 6.2 to 8.3 Pk 12.3 Ph range 11.3 to 13.3 Citrate Pka 3.1 Ph range 2.1 to 4.1 Pka 4.7 Ph 3.7 to 5.7 Pka 5.4 Ph range 4.4 to 6.4 Format […]
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How to investigation and take CAPA ? Deviation, Lab incident, OOS
Why investigation? To identified error Random error Impacts precision (Weight error dilution error injection to injection error Example document error, document error [ note : Precision show random error which is not control for us] +- positive and negative error possible Limit(+- 2) Systematic error Impact accuracy (if Assy result 90 % – 100% show consistence 92 % meet […]
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According USP Chapter 621 : Adjustment of Mobile Phase
Adjustment of Mobile Phase Adjustment in composition of the mobile phase Adjustment ph of the aqueous component of the mobile phase Adjustment in concentration of salts in the buffer component of a mobile phase Adjustment in composition of the mobile phase Minor compound of the mobile phase can be adjusted by +- 30 % Relative […]
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HPLC Calibration As per IPC Pharmacopeia give guidance
HPLC Calibration we have perform as earlier as per protocol Company will provided Like example Shimanzu HPLC calibration will perform as per that guidance's But now a day In 16th September 2021 As per IPC Pharmacopeia give guidance(Document ID IPC/GD/05) HPLC Calibration AS per guideline Calibration of pump Calibration of Autosampler Calibration Column Oven Calibration […]
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Types of Drug stability studies
Stability studies are mainly of following types: • Long term stability. • Intermediate stability. • Accelerated stability. • In-use stability.
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Specificity in analytical method validation - type of interference
Specificity As per ICH Q2A guideline defined as Specificity is the ability to assess unequivocally analyte in the present of component which may expected to present. Typically these might include impuries, degradants, matrix etc Selectivity The extent to which the method can be used to determine particular analytes in mixture or matrices without interference form […]
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HPLC COLUMN - FACTOR AFFECTS,During HPLC analysis
1) Partial Blockage of column 2) Adsorption of sample impurities inside column surface 3) Poorly packed stationary phase. 4) Mechanical or thermal shocks during Handling. 5) Chemical attack on the stationary phase.
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What is Specificity in analytical method validation
It t part of analytical method validation Here we identify that Any interference found in sample Like you made tablet azithromycine in such a case observer Any interference like Placebo Blank Degradent Solvents Dilution etc ( not affected retention time) If not any interference found that say (we have sepcific test processer) method is specificity […]
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Gas chromatography (GC) TYPE OF DETECTOR?
Ans: Flame lonisation Detector (FID) Thermal Conductivity Detector (TCD)Nitrogen Phosphorus Detector (NPD)Electron Capture Detector (ECD)Flame Photometric Detector (FPD) Photoionisation Detector (PID) Electrolytic Conductivity Detector (ELCD)Mass Spectrometer (MS) #HPLC #GC #IR #autotitration #ph #conductometry #calibration #calibrationHPLC #highperformanceliquidchromatography #detector #detectorsusedinhplc #detectorsusedgc #gaschromatography #principle #TLC #thinlayerchromatography #chromatography #mobilephase #column #ionexchange #titration #titrationtypes #ichguidelines #stability #validation #analyticalchemistry #chemistry #interview […]