Determination of Isotianil in Brown Rice and Soil Using Supercritical Fluid Extraction and Gas Chromatography/Mass Spectrometry

Tatsuo YOSHIDA; Asami ITOU; Rise YAMAMOTO; Toshiaki TOBINO; Hiroshi MURAKAWA; Kei TODA

doi:10.2116/analsci.29.919

Notes

Determination of Isotianil in Brown Rice and Soil Using Supercritical Fluid Extraction and Gas Chromatography/Mass Spectrometry

Tatsuo YOSHIDA, Asami ITOU, Rise YAMAMOTO, Toshiaki TOBINO, Hiroshi MURAKAWA, Kei TODA

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Keywords: Isotianil, pesticide, supercritical fluid extraction, gas chromatography/mass spectrometry, brown rice, soil

JOURNAL FREE ACCESS

2013 Volume 29 Issue 9 Pages 919-922

DOI https://doi.org/10.2116/analsci.29.919

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Abstract

Isotianil (3,4-dichloro-2′-cyano-1,2-thiazole-5-carboxanilide) is a new plant-activating pesticide. Usage of the pesticide was approved for rice fields in 2010 and its production increased 400 times (2 × 10⁴ kg) in the next year. In this work, a method for determining isotianil in brown rice and rice field soil was investigated for the first time. Isotianil was extracted by supercritical fluid extraction and measured by gas chromatography/mass spectrometry. Isotianil was successfully analyzed with good recoveries (95.1 – 99.3%) even from soil samples with strong adsorption of pesticides.

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