GC (gas chromatography)- Detector (17 types) in between 5 detector use pharma

1. CCD – Catalytic Combustion Detector

2. TCD – Thermal Conductivity Detector

3. FID – Flame Ionization Detector

4. DELCD – Dry Electrolytic Conductivity Detector

5. FID/DELCD – combination Flame Ionization Detector and Dry Electrolytic Conductivity Detector

6. HID – Helium Ionization Detector

7. PID – Photo Ionization Detector

8. NPD – Nitrogen-Phosphorus Detector

9. NPD/DELCD – combination Nitrogen-Phosphorus Detector and Dry Electrolytic Conductivity Detector (discontinued)

10. TID – Thermal Ionization Detector

11. FPD – Flame Photometric Detector

12. FPD/FID – combination Flame Photometric Detector and Flame Ionization Detector

13. Dual FPD – dual wavelength for simultaneous sulfur and phosphorus response

14. FID dual FPD – combination dual Flame Photometric Detector and Flame Ionization Detector

15. ECD – Electron Capture Detector

16. RGD – Reduction Gas Detector

Pharmaceutical company mostly  use 4 detector Gas chromatography