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投稿时间:2017-07-26
投稿时间:2017-07-26
中文摘要: 建立气质联用(Gas chromatography-mass spectrometry,GC-MS)测定罗汉果中6种拟除虫菊酯类农药的残留量方法。样品用石油醚-丙酮混合溶剂超声提后过固相萃取小柱净化,经HP-5MS色谱柱分离,以气相色谱质谱法进行检测,用外标法计算含量。结果表明:6种拟除虫菊酯类农药在0.1 μg/mL~1.0 μg/mL范围内呈现良好的线性关系,相关系数为 0.999 1~0.999 9,检出限为 0.139 μg/kg~5.262 μg/kg。样品中 3 个加标水平的回收率为 83.5%~106.1%,相对标准偏差(RSD)为0.9%~6.5%。本试验所建立的方法操作简便,具有良好的回收率,精密度和灵敏度,符合检测要求,可用于罗汉果中6种拟除虫菊酯类农药残留的测定。
中文关键词: 罗汉果 拟除虫菊酯 气相色谱-质谱法(GC-MS)
Abstract:The method for determination of six pyrethroid pesticides in Siraitia Grosvenorii by gas chromatography-mass spectrometry was established.The samples were extracted with organic solvent by ultrasound,and pyrethroid pesticides were cleaned-up by solid-phase extraction column,determined by GC-MS with HP-5MS chromatographic column.The contents were calculated by the external standard method.The results showed that the linear range was from 0.1 μg/mL to 1.0 μg/mL with correlation coefficients(r=0.999 1-0.999 9).The limits of detection were 0.139 μg/kg-5.262 μg/kg,and the average recoveries ranged from 83.5%to 106.1%,with the relative standard deviations from 0.9%to 6.5%.The proposed method is effective,quick,sensitive and reproducible,and can be applied to determine pyrethroid pesticide residues in Siraitia Grosvenorii.
文章编号:201723029 中图分类号: 文献标志码:
基金项目:广西科学研究与技术开发计划项目(桂科能1598025-18、桂科能14123006-21)
作者 | 单位 |
周先丽1,王鹏程1,李远远1,程柳2,罗琴1,梁成钦1,付明磊1,* | 1.桂林医学院广西高校生药学重点实验室,广西桂林541004;2.中国有色桂林矿产地质研究院有限公司,广西桂林541004 |
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