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.
Lloyd
Steven W
SW
United States Department of Agriculture, Agricultural Research Service, Southern Regional Research Center, New Orleans, LA 70124, USA. slloyd@srrc.ars.usda.gov
Grimm
Casey C
CC
D005504:Food Analysis; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D012680:Sensitivity and Specificity; D013696:Temperature