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Sci Justice

Title:		Classification of nine malathion emulsion samples by using carbon isotope ratios and the ratio of organic solvents
Author(s):		Suto N; Kawashima H;
Address:		"Department of Management Science and Engineering, Faculty of Systems Science and Technology, Akita Prefectural University, Akita Prefecture, Japan. Department of Management Science and Engineering, Faculty of Systems Science and Technology, Akita Prefectural University, Akita Prefecture, Japan. Electronic address: kawashima@akita-pu.ac.jp"
Journal Title:		Sci Justice
Year:		2017
Volume:		20161101
Issue:		1
Page Number:		1 - 5
DOI:		10.1016/j.scijus.2016.10.009
ISSN/ISBN:		1355-0306 (Print) 1355-0306 (Linking)
Abstract:		"The compound specific isotope analysis is nowadays an important and powerful tool in geochemical, environmental and forensics field. On November 2013, Aqli Foods Corporation in Japan dealt with complaints about stench from frozen foods produced. Subsequently, very high concentrations of organophosphorus pesticide as malathion, ethylbenzene and xylene were detected in recovered frozen foods. In particular case, we present the method to measure the stable carbon isotope ratio (delta(13)C) of nine malathion emulsion pesticides using gas chromatography/isotope ratio mass spectrometry (GC/IRMS) to identify the source. The delta(13)C values of malathion ranged from -30.6 per thousand to -29.5 per thousand. Because malathion used in all malathion emulsions sold in Japan is imported from the same overseas company, Cheminova, Denmark. The delta(13)C values of ethylbenzene ranged from -28.2 per thousand to -20.8 per thousand and those of m,p-xylene from -28.7 per thousand to -25.2 per thousand. The differences in the delta(13)C values may be because of the material itself and chemical processing. We also determined the ratio of ethylbenzene to m,p-xylene and finally categorized the nine malathion samples into five groups on the basis of this ratio and the delta(13)C values of ethylbenzene and m,p-xylene. The results of isotopic fractionation during volatilization (refrigerate, room temperature and incubator) was negligible small"
Keywords:		Benzene Derivatives/chemistry Carbon Isotopes/*analysis Crime Emulsions/chemistry *Foodborne Diseases Frozen Foods *Gas Chromatography-Mass Spectrometry Humans Insecticides/*chemistry Japan Malathion/*chemistry Xylenes/chemistry Carbon isotope Food poison;
Notes:		"MedlineSuto, Nana Kawashima, Hiroto eng Research Support, Non-U.S. Gov't England 2017/01/09 Sci Justice. 2017 Jan; 57(1):1-5. doi: 10.1016/j.scijus.2016.10.009. Epub 2016 Nov 1"