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Residue determination and risk assessment of benziothiazolinone in citrus by LC-MS/MS

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posted on 2019-09-26, 10:27 authored by Xiangwu Liu, Bangyan Song, Xiaoxia Jiang, Ya Yang, Ping Lu, Deyu Hu

A quick, easy, cheap, effective, rugged and safe liquid chromatography-tandem mass spectrometry technology was used to determine benziothiazolinone in citrus. Orthogonal test and single-factor analysis were conducted to identify the optimal extraction method of benziothiazolinone. The good linearity (R2 > 0.9949), high accuracy and precision, matrix effect and satisfactory recoveries (79.31%–98.68%) at three spiked levels (0.02, 0.2 and 2 mg/kg) with low relative standard deviation values (0.63%–8.68%) were validated. The limits of detection and quantification were within 0.2–0.8 and 20 μg/kg, respectively. This study could provide guidance for the reasonable use of this fungicide and for the establishment of maximum residue level.

Funding

This work was supported by the National Key Research and Development Program of China under Grant number [2016YFD0201305] and Science and Technology Support Program of Guizhou Province under Grant number [[2019]2347].

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    International Journal of Environmental Analytical Chemistry

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