The flame photometric detector (FPD) is a selective detector with high sensitivity for phosphorus (P), sulfur (S) and organic tin (Sn) compounds.
This detector, like the FID, is equipped with a hydrogen burner. In the flame, combustion products are ionized and the particles are excited.
FPD is highly selective as it detects element specific light emitted in a hydrogen flame. Phosphorus-containing compounds can be detected by their emission at 526 nm, while sulfur-containing compounds emit at 394 nm.
Application:
The FPD detector is most often used to determine sulfur compounds (H2S, COS, mercaptans) in refinery streams, process gases, LPG, gasoline, kerosene, pyrolysis gases and air. Detection limit as low as 0.1-1 ppm
