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Position: Home > Articles > Determination of Imidaclothiz in Different Tea by Liquid Chromatography-tandem Mass Spectrometry Journal of Anhui Agricultural Sciences 2019,47 (15) 201-204

液相色谱串联质谱法测定不同茶叶中的氯噻啉

作  者:
徐潇颖;罗金文;刘柱;金绍强;朱炳祺
单  位:
浙江省食品药品检验研究院
关键词:
氯噻啉;液相色谱-串联质谱;茶叶;固相萃取
摘  要:
[目的]建立茶叶中氯噻啉残留量的液相色谱-串联质谱检测方法.[方法]茶叶样品经乙腈提取,提取液通过TPT固相萃取柱净化后进行仪器分析.对样品提取、净化及仪器条件参数进行优化.[结果]氯噻啉在1~500 ng/mL线性关系良好(R2>0.999);检出限为1.5μg/kg,定量限为5.0μg/kg;在0.005、0.010、0.050和3.000 mg/kg条件下,回收率可达88.8%~109.1%,相对标准偏差(RSD)≤5.4%(n=6).[结论]通过方法学考察和实验室间验证表明,该方法灵敏、准确,适用于各种茶叶中氯噻啉残留量的定性和定量分析.
译  名:
Determination of Imidaclothiz in Different Tea by Liquid Chromatography-tandem Mass Spectrometry
作  者:
XU Xiao-ying;LUO Jin-wen;LIU Zhu;Zhejiang Institute for Food and Drug Control;
关键词:
Imidaclothiz;;Liquid chromatography-tandem mass spectrometry(LC-MS/MS);;Tea;;Solid phase extraction
摘  要:
[Objective] The research aimed to establish a liquid chromatography-tandem mass spectrometry method for the determination of chlorothiazide residues in tea.[Method]Tea sample was extracted by acetonitrile and purified by TPT solid phase extraction before instrumental analysis. This study optimized extraction method, clean up method and instrumental parameters.[Result] The linear relationship of chlorothiazide in 1-500 ng/mL is good(R~2 > 0.999);the limit of detection(LOD) and limit of quantification(LOQ) were 1.5 μg/kg and 5.0 μg/kg, respectively. The recoveries were 88.8%-109.1% with relative standard deviations(RSD) lower than 5.4%(n=6).[Conclusion] Based on the results of method validation and inter-laboratory validation, this method has proven to be sensitive, accurate and suitable for the qualitative and quantitative determination of imidaclothiz residue in tea.

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