加速溶剂萃取-超高效液相色谱-串联质谱法测定番茄植株中氯草枯和甲草枯残留量

Hongxia Zhang, Fengge Li, Xiao-yan Li, Xuewen Li, Weiqin Yao
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引用次数: 1

摘要

建立了一种加速溶剂萃取-超高效液相色谱-串联质谱(ASE-UPLC-MS/MS)方法,以纯净水为萃取溶剂,对番茄植物样品中的色素(CQ)和甲氧喹(MQ)进行定量分析,具有较高的灵敏度和较短的提取时间。本文讨论了CQ和MQ残数及其耗散率。CQ和MQ的检出限(S/N>3)和定量限(S/N>10)分别为0.02 μg/kg和0.1 μg/kg。在1.0、2.0和5.0 μg/kg加标范围内,番茄根、茎、叶中CQ和MQ的平均加标回收率分别为100.0%~118.8%和93.2%~110.7%。耗散试验结果表明,33 d后,CQ和MQ的平均耗散率分别为98.8%和99.7%,半衰期分别为3.67d和3.66d,可为CQ和MQ在番茄安全范围内的使用提供指导。关键词:番茄;加速溶剂萃取;超高效液相色谱-串联质谱法;Chlormequat;Mepiquat
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Determination of Chlormequat and Mepiquat Residues in Tomato Plants Using Accelerated Solvent Extraction-Ultra-Performance Liquid Chromatography- Tandem Mass Spectrometry
An Accelerated-Solvent Extraction-Ultra performance Liquid Chromatography-Tandem Mass Spectrometry (ASE-UPLC-MS/MS) method using purified water as extraction solvent for quantitative analysis of chromequat (CQ) and mepiquat (MQ) in samples of tomato plants with higher sensibility and shorter extraction time was developed. The CQ and MQ residues and their dissipation rate were both covered in this paper. The limits of detection (S/N>3) and limits of quantitation (S/N>10) for CQ and MQ were 0.02 μg/kg and 0.1 μg/kg respectively. The linear range was 0.2~10 μg/kg and the correlation coefficients (r2) was no less than 0.9990, The average recoveries of CQ and MQ from tomato root, stem and leaf in the three spiked range of 1.0, 2.0 and 5.0 μg/kg were in the range of 100.0%~118.8% and 93.2%~110.7% respectively. The dissipation experiment showed that, on average, 98.8% of CQ residues and 99.7% of MQ residues had dissipated after 33 days, with a half-life of 3.67d and 3.66d, which can provide with guideline for using CQ and MQ on tomato in safe range. Key words: Tomato plants; Accelerated solvent extraction; Ultra-performance liquid chromatography-tandem mass spectrometry; Chlormequat; Mepiquat
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