TWO general chapter
1) USP41 2) USP1251
European Directorate for the Quality of Medicines & HealthCare.
2 ml vial and 800 micro liter Injection taken hplc
Chapter no <1225>
RT means Retention time
RRT means Relative Retention time
Relative retention time mean as compared main peak
Example Main peak RT is 5 and A impurities RT is 2
So RRT =2/5 =0.4
Impurities A RRT =0.4
Molality is the number of solutes that are present in 1 kg of a solvent.
Titration is a process to determine the molarity of a base or an acid. In this process, a reaction is carried out between the known volumes of a solution with a known concentration, against the known volume of a solution with an unknown concentration.
Mole is the unit used to define the number of chemical substance present in a substance. It is the amount of substance which consists of the same number of chemical units as there are atoms in exactly 12 gram of pure carbon-12.
Valency is a property of groups or atoms, equal to the number of atoms of hydrogen that the group or atom could combine with or displace it in forming compounds.
The monomer of polyethylene is ethylene
Negative log H+ Concentration
about pH 6
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