The Sulfur-Phosphorous Flame Photometric Detector SP-FPD

Heteroatom selective (for organic compounds with S or P atoms separately) destructive mass-flow detector less sensitive and shorter dynamic range than FID. 

S-selective mode it is useful to characterize the organosulfur compounds in complex petroleum mixtures, as the much higher levels of coeluting hydrocarbon peaks give minimal response. Operated in P-selective mode it is a sensitive detector for organophosphorus pesticide trace residues in complex environmental mixtures. Only the sulfur mode response range is illustrated in Fig. 12.13. 

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