P. Oswald et al., On the capillary gas chromatographic determination of petroleum hydrocarbons in environmental samples, CHEM LISTY, 93(10), 1999, pp. 628
The CGC-FID determination of petroleum hydrocarbons in environmental sample
s is based on the assumption that the mass response of FID for hydrocarbons
is constant and any petroleum distillation fraction can be used as a refer
ence mixture for calibration purposes. It has been shown that the mass resp
onses of FID for higher bailing hydrocarbons are not constant. Moreover, it
was found that mess response calibration factors for petroleum oils boilin
g within an equal temperature interval differ more than 2.5 fold in depende
nce on the hydrocarbon group composition. In the CGC-FID determination of s
uch petroleum hydrocarbons in environmental samples it is therefore necessa
ry to use a reference material which provides not only chromatograms but al
so the group composition.