Published: Journal of Chromatographic Science, Volume
37, Number 9, October 1999, pp. 407-410
Fractionation of Plant Extracts by Supercritical Fluid
Extraction and Direct Introduction in Capillary Gas Chromatography using a Programmable
Temperature Vaporizer
Gracia P. Blanch, M. Mar Caja, María Luisa Ruiz
del Castillo, Guillermo Santa-María, and Marta Herraiz
A simple procedure to improve the sensitivity achievable in
the analysis of supercritical fluid extracts of complex matrices is proposed.
The method involves the offline coupling of supercritical fluid extraction and
gas chromatography (GC) in such a way that the glass liner of a programmed temperature
vaporizer is placed after the separation vessels of the extraction module. The
subsequent chromatographic analysis is simply achieved by direct introduction
of the glass liner into the GC. The proposed procedure is also adequate to perform
the fractionation of supercritical fluid extracts into different groups of compounds,
thus allowing the performance of highly selective extractions.
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