The Measurement of Stable Carbon Isotope Ratios of Eight Methamidophos Samples.

Abstract:

:Between December 2007 and January 2008, people suffered from food poisoning in the Japanese prefectures of Chiba and Hyogo after eating frozen dumplings (gyoza) produced in China, which had very high concentrations (1490-19,290 ppm) of methamidophos (O,S-dimethyl phosphoramidothioate). Thus, we measured the stable carbon isotope ratio of methamidophos using GC/C/IRMS to identify the source. We analyzed seven methamidophos reagents and one Chinese agricultural methamidophos chemical (MTD600) that contained many impurities. The δ13C values of the seven methamidophos reagents and MTD600 ranged from -49.23‰ to -31.90‰, with an average SD of 0.20‰, very high precision. This difference (17.33‰) was very large compared with that in previous reports and may be attributable to the material itself and the chemical processing of methamidophos. Criminals can easily obtain pesticides such as methamidophos; therefore, it is very important to identify the pesticide source and distribution route using stable isotopic science in the future.

journal_name

J Forensic Sci

authors

Kawashima H

doi

10.1111/1556-4029.12825

subject

Has Abstract

pub_date

2015-09-01 00:00:00

pages

1360-4

issue

5

eissn

0022-1198

issn

1556-4029

journal_volume

60

pub_type

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