Nitrogen and phosphorus compounds are especially sensitive to the thermionic emission type, but care must be taken to eliminate current reducing CFC's from the sample if an electron capture or flame ionization detector is used.
In this method, the McReynolds constant standardizes the Kovats retention index of the compound of interest with respect to squalane, while the rate of band broadening is given by the Van Deemter equation. Nitrogen and phosphorus compounds are especially sensitive to the thermionic emission type, but care must be taken to eliminate current reducing CFC's from the sample if an electron capture or flame ionization detector is used. Ion-flow problems can be considerably reduced by using a ion trap mass spectrometer detector, in which a drift tube collects the sample for analysis as it emerges from the capillary or silica packed column.  FTP, name this type of chromatography in which the volatilized portion of a sample is drawn off and separated by a carrier vapor flowing over a stationary phase.
In this method, the McReynolds constant standardizes the Kovats retention index of the compound of interest with respect to squalane, while the rate of band broadening is given by the Van Deemter equation.
gas chromatography or gas-liquid chromatography