QUANTITATIVE ASPECTS OF DIRECTLY COUPLED SUPERCRITICAL-FLUID EXTRACTION CAPILLARY GAS-CHROMATOGRAPHY WITH A CONVENTIONAL SPLIT SPLITLESS INJECTOR AS INTERFACE
Xw. Lou et al., QUANTITATIVE ASPECTS OF DIRECTLY COUPLED SUPERCRITICAL-FLUID EXTRACTION CAPILLARY GAS-CHROMATOGRAPHY WITH A CONVENTIONAL SPLIT SPLITLESS INJECTOR AS INTERFACE, HRC. Journal of high resolution chromatography, 16(7), 1993, pp. 425-428
The quantitative aspects of on-line supercritical fluid extraction-cap
illary gas chromatography (SFE-GC) with a split/splitless injector as
interface were investigated. Special attention was paid to the discrim
ination behavior and the reproducibility of the split/splitless interf
ace. A simple experimental set-up is proposed that allows accurate qua
ntitation in on-line SFE-split GC. The results obtained in on-line SFE
-GC compare favorably with those from conventional GC with split injec
tion. Discrimination was found to be absent when working at sufficient
ly high interface temperatures. Finally, the effects of the carbon dio
xide flow rate, interface temperature and split ratio on both discrimi
nation and reproducibility were studied.