Determination of benzenic and halogenated volatile organic compounds inanimal-derived food products by one-dimensional and comprehensivetwo-dimensional gas chromatography-mass spectrometry

摘要

Animal-derived products are particularly vulnerable to contamination by volatile organic compounds(VOCs). These lipophilic substances, which are generated by an increasing number of sources, are easilytransferred to the atmosphere, water, soil, and plants. They are ingested by livestock and become trappedin the fat fraction of edible animal tissues. The aim of this work was to determine the occurrence, riskfor human health and entryways of benzenic and halogenated VOCs (BHVOCs) in meat products, milksand sea foods using gas chromatography- mass spectrometry (GC-MS) techniques. In the first part,the occurrence and levels of the BHVOCs in animal products were studied. One muscle and three fattissues were analysed by GC-Quad/MS in 16 lambs. Of 52 BHV005 identified, 46 were found in thethree fat tissues and 29 in all four tissues, confirming that V005 are widely disseminated in the body.Twenty-six BHV005 were quantified in fat tissues, and risk for consumer health was assessed for six ofthese compounds regulated by the US Environmental Protection Agency (EPA). The BHVOC content wasfound to be consistent with previous reports and was below the maximum contaminant levels set bythe EPA. In the second part, the performance of GCx GC-TOF/MS for comprehensively detecting BHV005and showing their entryways in animal-derived food chains was assessed. Meat, milk and oysters wereanalysed by GC-Quad/MS and GCx GC-TOF/MS. For all these products, at least a 7-fold increase in thecontaminants detected was achieved with the GCxGC-TOF/MS technique. The results showed that theproduction surroundings, through animal feeding or geographical location, were key determinants ofBHVOC composition in the animal products.