Crisis management system for pesticides using stable isotope

2014 Fiscal Year Final Research Report

• Project/Area Number: 24681034
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Social systems engineering/Safety system
• Research Institution: Akita Prefectural University
• Principal Investigator: KAWASHIMA Hiroto 秋田県立大学, システム科学技術学部, 助教 (60381331)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 環境鑑識学 / 異同識別 / 分析化学 / 安定同位体比 / 農薬疑義資材

Outline of Final Research Achievements

We obtained samples of four NPEFs that were contaminated with the synthetic pyrethroid cypermethrin, and we used GC/IRMS to determine the stable carbon isotope ratios (δ13C) for the cypermethrin in the four NPEF samples, as well as in ten cypermethrin reagents and two commercial pesticide formulations. The δ13C values (± standard deviation) of the 16 cypermethrin samples ranged from -28.3 ± 0.2‰ to -24.5 ± 0.2‰. The four NPEFs showed similar δ13C values (-26.8‰ to -27.3‰), suggesting that the cypermethrin in all the samples came from the same source (either the same chemical reaction or the same primary material).
In addition, we analysed δ13C of 5 pesticides, 6 sugar, 10 amino acid and 2 caffeine samples using direct injection mode and online LC/IRMS mode. In this study, the ion chromatography system was coupled with IRMS instrument.

Free Research Field

環境鑑識学