Analysis of Highly Volatile Components of Foods by Off-Line SFE/GC

Abstract

A sample collection method is proposed for off-line coupling supercritical fluid extraction/gas chromatography (SFE/GC) through a programmed temperature vaporizer (PTV) and using a variable restrictor. Experiments were carried out to obtain the most favorable conditions for the analysis of highly volatile components of foods. Average recoveries of ∼50% and coefficients of variation of absolute areas <10% were obtained for a standard mixture of compounds of high volatility. When real fruit samples were extracted and analyzed, coefficients of variation achieved ranged from 2 to 10%. To test its performance, the method was applied to the analysis of fresh raspberries. Keywords: Off-line SFE/GC; fruit samples; volatiles

Essential Oils from Medicinal Plants: Extraction Techniques, Biochemical Characterization, and Technical Analysis

“…This is a complementary method to CPG-mass insofar as by TF infrared spectrometry distinguishes isomers of compounds eluted by GC not observable with mass spectrometry [40].…”