色谱 ›› 2025, Vol. 43 ›› Issue (7): 805-814.DOI: 10.3724/SP.J.1123.2024.09009

• 研究论文 • 上一篇    下一篇

快速滤过型净化法结合气相色谱-串联质谱法快速筛查代用茶中125种农药残留

张权1, 吴玉田1, 彭蕾1, 毕珊1, 周贻兵1, 林野1, 刘利亚1, 陈庆园1,*(), 周雪2,*()   

  1. 1.贵州省疾病预防控制中心,贵州 贵阳 550004
    2.贵州医科大学药学院,贵州 贵阳 550025
  • 收稿日期:2024-08-19 出版日期:2025-07-08 发布日期:2025-07-04
  • 通讯作者: *E-mail:393043101@qq.com(周雪);E-mail:jkzxcqy@126.com(陈庆园).
  • 基金资助:
    国家重点研发计划(2017YFC1601805);贵州省科技支撑计划(黔科合支撑[2017]2972);贵州省卫生健康委科学技术基金项目(gzwkj2024-224);贵州疾控博士工作室(bsgzs2025-01)

Rapid screening of 125 pesticide residues in tea substitutes by multi-plug filtration cleanup method combined with gas chromatography-tandem mass spectrometry

ZHANG Quan1, WU Yutian1, PENG Lei1, BI Shan1, ZHOU Yibing1, LIN Ye1, LIU Liya1, CHEN Qingyuan1,*(), ZHOU Xue2,*()   

  1. 1. Guizhou Center for Disease Control and Prevention,Guiyang 550004,China
    2. School of Pharmacy,Guizhou Medical University,Guiyang 550025,China
  • Received:2024-08-19 Online:2025-07-08 Published:2025-07-04
  • Supported by:
    National Key Research and Development Program of China(2017YFC1601805);Science and Technology Plan Project of Guizhou Province (the Guizhou Provincial Key Technology R&D Program No. [2017]2972);Science and Technology Fund of Guizhou Health Commission(gzwkj2024-224);Guizhou CDC Doctoral Workshop(bsgzs2025-01)

摘要:

利用快速滤过型净化法结合气相色谱-串联质谱(GC-MS/MS)分析,建立了代用茶基质中125种不同极性农药残留的快速筛查方法。目标物经DB-1701MS石英毛细管色谱柱(30 m×0.25 mm×0.25 μm)程序升温分离,GC-MS/MS多反应监测(MRM)模式检测,基质匹配内标法定量。通过GC-MS/MS检测方法对代用茶中的125种代表性农药进行了方法学验证。结果表明,M-PFC TD-1型茶叶快速滤过型净化柱对铁皮石斛花提取液净化效果良好,而且能保证较高的农药回收率。方法学考察结果表明:125种组分在0.01~1.0 mg/L范围内呈良好的线性关系(R2>0.980),方法的检出限(LOD,S/N=3)为0.003~0.02 mg/kg,方法的定量限(LOQ,S/N=10)为0.01~0.05 mg/kg,在低、中、高3个不同加标水平下125种目标物的回收率范围为62.6%~107.6%,相对标准偏差(RSD)为1.0%~13.8%(n=6)。与其他经典的前处理方法相比,本方法无需活化、平衡、洗脱步骤,消耗溶剂较少,且M-PFC TD-1柱在净化效果方面表现得更好,可直接吸附代用茶基质中的色素、生物碱等大分子干扰物,操作简单、快速,灵敏度较高,适用于大批量代用茶中农药多残留的快速筛查。采用本研究建立的方法对贵州省食药物质试点生产企业提供的50份代用茶样品进行检测,其中在2份代用茶样品中各检出至少1种农药残留,检出率为4%。本研究为掌握代用茶产品中的农药残留种类及水平,提高相关的地方标准指标设置或技术要求的科学性和实用性提供了技术支持。

关键词: 气相色谱-串联质谱, 快速滤过性净化, 农药残留, 快速筛查, 代用茶

Abstract:

A rapid screening method for 125 pesticide residues of different polarities in tea substitutes matrix was developed using rapid screening combined with gas chromatography-tandem mass spectrometry (GC-MS/MS). The targets were separated on DB-1701MS quartz capillary column (30 m×0.25 mm×0.25 μm) with programmed temperature rise, detected by GC-MS/MS in multiple reaction monitoring (MRM) mode, and quantified by matrix-matched solution internal standard method. The methodological validation of 125 representative pesticides in tea substitutes was carried out by GC-MS/MS method. The results showed that the tea samples could be extracted most efficiently when using acetonitrile without immersion in water. The M-PFC TD-1 column had a good purification effect on the Dendrobium officinale flower extract with a guaranteed high recovery. The results of optimized analysis showed that the 125 components had a good linear correlation in the range of 0.01 mg/L to 1.0 mg/L (R2>0.980). The LODs and LOQs were 0.003-0.02 mg/kg (S/N=3) and 0.01-0.05 mg/kg (S/N=10),respectively. The recoveries of the 125 targets at three levels were in the range of 62.6%-107.6% with relative standard deviations (RSDs, n=6 of 1.0%-13.8%. Compared with other classical pretreatment methods, this method does not require activation, equilibration and elution steps, consumes less solvent, and the M-PFC TD-1 column shows better purification effect, which can directly adsorb large molecular interferences, such as pigments and alkaloids, in the matrix of the substitute tea, and is easy to operate, rapid, and with high sensitivity, which is suitable for the rapid screening of pesticide multicomponent residues in the bulk substitute tea. The method established in this study was used to monitor 50 samples of tea substitutes provided by the pilot production enterprises in Guizhou Province, in which at least one pesticide residue was detected in two samples of tea substitutes, with a detection rate of 4%. This study aims to enhance the scientific and practical aspects of setting local standard indicators or technical requirements by understanding the types and levels of pesticide residues in substitute tea products.

Key words: gas chromatography-tandem mass spectrometry (GC-MS/MS), multi-plug filtration cleanup, pesticide residues, rapid screening, tea substitutes

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