This presentation will compare the various analytical procedures in terms of sample preparation and analysis. GC coupled detection systems including MS, FID, AED, FPD and chemiluminescence will be compared in terms of sensitivity, selectivity and cost. Advantages and disadvantages of isotope dilution analysis will also be presented. Return to Presentations Gas Chromatography - Olfactometry and Chemilluminescence Characterization of Sulfur Compounds in Grapefruit Juice. Only a few of these volatiles have been reported in the literature.
Many sulfur compounds are highly aroma active even though present at sub ppm levels.
In this paper we present the first procedure which allows the determination of aroma intensity and description for those sulfur compounds with aroma activity as well as the analytical determination of all volatile sulfur compounds in a single analysis. Using cooled injection systems and column splitting, coupled with olfactometric and chemilluminescence detection, sulfur peaks with aroma activity were identified. Over 20 sulfur containing peaks were observed. At least three peaks had aroma activity. Thermal processing and storage appreciably impacted the number and amounts of volatile sulfur containing compounds in grapefruit juice.