Fast temperature-programmed gas chromatography-mass spectrometry for food analysis.
Fast temperature-programmed gas chromatography (FTGC) is evaluated. A modified capillary column allowing temperature-program rates as high as 20 degrees C/s is operated with mass spectrometric detection (MSD). FTGC methods are developed for the analysis of off-flavors in water, derivatized sugars, and fatty acid methyl esters. Liquid injection and solid-phase microextraction are evaluated. Although the resolution can be somewhat lower than analysis with a traditional column, time savings are significant. Analysis times range from 2 to 4.5 min compared with 20 to 60 min for conventional methods. MSD allows for the analysis of some coeluting peaks, which allows for quantitation even when peaks coelute.
United States Department of Agriculture, Agricultural Research Service, Southern Regional Research Center, New Orleans, LA 70124, USA. slloyd@srrc.ars.usda.gov
Steven W
SW
Lloyd
Casey C
CC
Grimm
D005504:Food Analysis; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D012680:Sensitivity and Specificity; D013696:Temperature