数字农科院2.0

改良QuEChERS方法与UPLC-MS/MS联用测定茶叶中草甘膦、草铵膦及氨甲基膦酸

文献类型: 中文期刊

作者: 李自强;杨梅;张新忠;罗逢健;楼正云;梁爽

作者机构:

关键词: QuEChERS;茶;草甘膦;草铵膦;氨甲基膦酸

期刊名称:茶叶科学

ISSN: 1000-369X

年卷期: 2023 年 2 期

页码:

收录情况: 北大核心(2020版) ; ; CSCD(2023-2024年度) ; ; 科技核心(2023版) ; ; 农林核心(2020版)

摘要: 建立了改良QuEChERS-超高液相色谱-串联质谱法(UPLC-MS/MS)快速检测红茶和绿茶中草甘膦、草铵膦及氨甲基膦酸残留的分析方法.样品经纯净水提取2次,提取液采用MWCNT、C18、PVPP和CNT-OH吸附剂分散固相萃取净化,质谱以多反应监测模式(MRM)进行测定,外标法定量.结果表明,红茶和绿茶基质中,草甘膦、草铵膦和氨甲基膦酸在一定浓度范围内线性良好,相关系数(R2)为0.9993~1.0000,方法的检出限(LOD)分别为0.0050、0.030、0.030 mg·kg-1,定量限(LOQ)分别为0.050、0.10、0.10 mg·kg-1,平均加标回收率在81.6%~120.0%,相对标准偏差(RSD)在0.6%~13.6%.该方法前处理简单、成本低、重复性好、灵敏度高,适用于红茶和绿茶中草甘膦、草铵膦及氨甲基膦酸的检测.

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