This document discusses various detectors used in gas chromatography. It begins by introducing gas chromatography and its principles of separation. It then describes several common detectors including the thermal conductivity detector, flame ionization detector, electron capture detector, flame photometric detector, argon ionization detector, and nitrogen-phosphorus detector. For each detector, it provides details on its working principle, advantages, disadvantages, and applications. The document concludes by comparing different detectors based on their selectivity, sensitivity and dynamic range.

1. GAS CHROMATOGRAPHY DETECTORS Presented By : Amul Chahar

7. Instrumentation

11. Thermal Conductivity Detector

14. Flame Ionisation Detectors (FID)

17. Electron Capture Detector (ECD)

20. Flame Photometric Detector (FPD)

23. Argon Ionisation Detector (AID)

26. Nitrogen-phosphorus Detector (NPD)

28. Detectors Type Support gases Selectivity Sensitivity Dynamic range Flame ionization (FID) Mass flow Hydrogen & air Most organic compounds Highly sensitive 10 7 Thermal conductivity (TCD) Concentration Reference Universal Low sensitive 10 7 Electron capture (ECD) Concentration Make-up Halides, nitrates, nitriles, peroxides, anhydrides, organometallics Sensitive to electronegative group 10 5 Flame photometric (FPD) Mass flow Hydrogen & air possibly oxygen Sulphur, phosphorus, tin, boron, arsenic, germanium, selenium, chromium High sensitive 10 3 Argon Ionisation Detector (AID) Concentration Make-up Organic compound Highly sensitive 10 7

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