Flame photometric detector
The flame photometric detector ( FPD ) is a detector for phosphorus and sulfur compounds , which is mainly used in connection with gas chromatographs (GC) or as a fire detector .
Measuring principle
The FPD uses the light of certain wavelengths released during the combustion of phosphorus and sulfur compounds . The combustion of the substance takes place in an oxyhydrogen flame , as with the flame ionization detector . The sulfur and phosphorus atoms excited in this way emit light with a characteristic wavelength (394 nm for sulfur and 526 nm for phosphorus).
Technical use
Fire alarm
The first flame photometric detector (FPD) was developed by DW Grant in the 1950s. The selective measurement takes place with an appropriate filter with the help of a photomultiplier . An FPD is very sensitive and works selectively. The principle is considered to be the best sulfur detector.
GC detector
The GC / FPD coupling was developed in the 1960s. When used as a GC detector, detection is also carried out by means of a photomultiplier with an upstream filter. The detection limits for phosphorus are approx. 10 pg, for sulfur they are> 100 pg. The detector has a non-linear response for sulfur.
With the FPD, halogenated hydrocarbons and organotin compounds can also be detected with appropriate filters . A further development of the FPD is the PFPD (Pulsed Flame Photometric Detector)
literature
- Sam S. Brody, John E. Chaney: Flame photometric detector: the application of a specific detector for phosphorus and for sulfur compounds - sensitive to subnanogram quantities. In: Journal of Gas Chromatography. Vol. 4, No. 2, 1966, pp. 42-46, doi : 10.1093 / chromsci / 4.2.42 .
Web links
- Pulsed Flame Photometric Detector (accessed March 19, 2020)
- Gas chromatographic methods for the determination of organic substances in biological material (accessed on March 19, 2020)
- Introduction to Chromatography (accessed March 19, 2020)
- Solutions from the extraction point to the provision of the measurement results (accessed on March 19, 2020)
- Development and commissioning of trace analysis to determine the quality of fermentation carbon dioxide with a view to optimizing existing recovery systems (p. 44) (accessed on March 19, 2020)