Headspace oxygen in sample vials affects volatiles production of meat during the automated purge-and-Trap/GC analyses.

Automated dynamic headspace/GC-MS analyses affect the repeatability of volatiles in irradiated Turkey.

Although a dynamic headspace/gas chromatography-mass spectrometry (DH/GC-MS) method is an effective tool for determining volatiles of irradiated turkey meat, the profile of volatiles may be changeable depending upon the availability of oxygen in the sample vial and sample holding time before purge. The objective of this study was to evaluate the effects of helium flushing and sample holding tim...

Fat Reduces Volatiles Production in Oil Emulsion System Analyzed by Purge-and-Trap Dynamic Headspace/Gas Chromatography

Release of volatiles in oil emulsion systems containing various fat contents was determined using purge-and-trap dynamic headspace/gas chromatography. Oil emulsions were prepared using 0, 0.5, 1, 2, 4, or 8% oil, and a standard mixture was prepared using hydrocarbons, aldehydes, ketones, and alcohols. Fat content in oil emulsions reduced the volatility of added volatile standards, and the amoun...

Automated Dynamic Headspace/GC-MS Analyses Affects the Repeatability of Volatiles in Irradiated Turkey

Benefits and Limitations of Static Headspace and Purge-and-Trap for the Analysis of VOCs

Static headspace analysis can provide reasonably good sensitivity for halogenated hydrocarbons and aromatic compounds. But USEPA Method 524.2 Revision 4 requires the evaluation of several analytes containing different functional groups such as ketones, ethers, and esters. Such compounds can be particularly difficult to analyze at low concentration using static headspace due to the affinity of p...

The Use of a Multi Purpose Sampler for Headspace GC-MS Analysis of Volatile Organic Compounds in Human Urine

A multi purpose sampler (Gerstel MPS), designed for liquid large volume, gaseous and headspace samples was tested for its suitability in the GC-MS analysis of organic volatiles in human urine. Headspace sampling with a volume, temperature and speed controlled gas tight syringe was combined with a temperature controlled cold injection system for cold trapping, enrichment and focussing of analyte...