Determination and study on dissipation of 1-naphthylacetic acid in garlic and soil using high performance liquid chromatography–tandem mass spectrometry
2011
Guan, Wenbi | Xu, Pengjun | Wang, Kai | Song, Yue | Zhang, Hongyan
A simple, quick and reliable analytical method for the determination of 1-naphthylacetic acid in garlic and soil has been developed in this study. The residual levels and dissipation rates of 1-naphthylacetic acid in garlic and soil were determined by high performance liquid chromatography–tandem mass spectroscopy (HPLC–MS/MS). The limit of quantification (LOQ) of the developed method was 0.005mg/kg. The half-lives of 1-naphthylacetic acid in garlic plants and soil were 0.80–1.4days and 0.94–2.0days, respectively. The final residues of 1-naphthylacetic acid in garlic, garlic sprout and soil could not be detected and were all below 0.05mg/kg (the MRL of EU). Results of the ultimate residues in garlic and soil showed that this pesticide is safe to be used under the recommended dosages.
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