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Talanta

Title:		Analysis of volatile compounds in powdered milk for infant nutrition by direct desorption (CIS4-TDU) and GC-MS
Author(s):		Francesca I; Patrizia P; Luca C; Federico M; Annalisa R;
Address:		"PHYTOLAB laboratory, Scientific and Technological Pole, Via Ugo Schiff 6, Sesto Fiorentino, 50019 FIorence, Italy; DiSIA - Department of Statistics, Computer Sciences and Applications, University of Florence, Viale Morgagni 59, 50134 Florence, Italy. Electronic address: francesca.ieri@unifi.it. PHYTOLAB laboratory, Scientific and Technological Pole, Via Ugo Schiff 6, Sesto Fiorentino, 50019 FIorence, Italy; DiSIA - Department of Statistics, Computer Sciences and Applications, University of Florence, Viale Morgagni 59, 50134 Florence, Italy. DISPAA - Department of Agriculture, Food and Environmental Science - University of Florence, Piazzale Cascine 28, 50144 Florence, Italy. HEINZ ITALIA S.p.A., Milan, Italy"
Journal Title:		Talanta
Year:		2015
Volume:		20150414
Issue:
Page Number:		195 - 199
DOI:		10.1016/j.talanta.2015.04.026
ISSN/ISBN:		1873-3573 (Electronic) 0039-9140 (Linking)
Abstract:		"Direct thermal desorption coupled with the Gas Chromatography-Mass Spectrometry (TDU-CIS4-GC-MS) technique applied to powdered milk was used as a novel approach for the characterization and quantification, as relative abundance, of volatile organic compounds (VOCs). The aim of this study was to exploit the potential applications and setup conditions of the CIS4-TDU-GC-MS technique for the identification of oxidized or non-oxidized samples of powdered milk for infant nutrition, subjected to accelerated aging through the changes in their VOCs profile over time. Thermal desorption at 30 degrees C and subsequent cryotrapping at -40 degrees C with a Gerstel Liner-in-Liner system allowed a direct thermal desorption and cryotrapping of VOCs without any memory effect, thus avoiding sample preparation and contamination. The analyses led to the identification of several characteristic off-flavors in the oxidized samples, which were used as molecular markers to discriminate samples with different oxidation degrees. Finally, VOC contaminants possibly present in the packaging can also be identified with this technique"
Keywords:		Animals Food Analysis/methods Gas Chromatography-Mass Spectrometry/*methods Humans Infant Infant Formula/*chemistry Milk/*chemistry Powders/analysis/chemistry Time Factors Volatile Organic Compounds/*analysis Baby food Food analysis Laboratory test Lipid;
Notes:		"MedlineFrancesca, Ieri Patrizia, Pinelli Luca, Calamai Federico, Marotta Annalisa, Romani eng Research Support, Non-U.S. Gov't Netherlands 2015/05/13 Talanta. 2015 Aug 15; 141:195-9. doi: 10.1016/j.talanta.2015.04.026. Epub 2015 Apr 14"