Determination of Mepiquat Chloride Residues in Cotton and Soil by Liquid Chromatography/Mass Spectrometry

文献类型： 外文期刊

第一作者： Dong, Feng-Shou

作者： Dong, Feng-Shou;Li, Shuo;Zheng, Yong-Quan

作者机构：

关键词： Methods and Techniques;Biochemistry and Molecular Biophysics

期刊名称：JOURNAL OF AOAC INTERNATIONAL （ 影响因子：1.913； 五年影响因子：1.754 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： A liquid chromatographic/mass spectrometric (LC/MS) method is reported for the determination of the onium-type plant growth regulator mepiquat chloride in cotton and soil. The pesticide was extracted from the sample with ethanol and water containing 2% NH4Cl. The extract was cleaned up on a solid-phase extraction C18 column, and the pesticide was determined by LC/MS. The average recoveries were 85.9-93.8, 81.3-91.7, and 78.1-94.7%, with corresponding relative standard deviations of 3.4-9.6, 3.7-12.3, and 4.0-9.8%, from soil, cotton leaves, and cotton seeds, respectively. A coefficient of determination of R-2 = 0.9964 was obtained for the analyte calibration graph, from 0.05 to 100 mu g/mL. Decision limits, CC alpha, and detection capability, CC beta, were calculated. Electrospray ionization LC/MS in the positive-ion mode (ESI+) was used to detect mepiquat chloride in extracts of soil, cotton leaves, and cotton seeds. The ion at m/z 114 in the mass spectrum was monitored.

分类号： O65

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