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| 多壁碳纳米管结合气相色谱-串联质谱法测定红茶和绿茶中9种农药残留 |
| Determination of residues of nine pesticides in black and green tea using multi-walled carbon nanotubes coupled with gas chromatography-tandem mass spectrometry |
| 投稿时间：2025-03-31 修订日期：2025-06-23 |
| DOI： |
| 中文关键词: 茶叶 多壁碳纳米管 气相色谱串联质谱法 农药残留 |
| 英文关键词:tea multi-walled carbon nanotubes gas chromatography-tandem mass spectrometry pesticide residues |
| 基金项目:通州区高层次人才发展支持计划（YHLD2019004） |
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| 中文摘要: |
| 目的 建立一种基于多壁碳纳米管（multi-walled carbon nanotubes，MWCNTs）结合气相色谱-串联质谱法（gas chromatography-tandem mass spectrometry，GC-MS/MS）测定红茶和绿茶中9种农药残留。方法 通过单因素实验优化关键参数，包括MWCNTs用量、超声提取时间及提取溶剂，并评估方法学性能，涵盖线性范围、检出限、定量限、准确度、精密度。结果 本方法线性关系良好，相关系数均＞0.99，检出限和定量限分别为0.002～0.004 mg/kg和0.007～0.012 mg/kg，红茶和绿茶中9种农药的加标回收率为71.5%～118.8%，相对标准偏差(relative standard deviation,RSD)为1.00%～6.92%。结论 本研究成功建立了一种基于MWCNTs结合GC-MS/MS的农药残留检测方法，具有高灵敏度、高回收率、低溶剂消耗等优势，显著提升了检测效率。实际样本检测表明，该方法适用于市售茶叶的快速筛查，为监管部门提供可靠的技术支持。 |
| 英文摘要: |
| Objective A method based on multi walled carbon nanotubes (MWCNTs) combined with gas chromatography tandem mass spectrometry (GC-MS/MS) was established for the determination of nine pesticide residues in black tea and green tea. Methods The key parameters were optimized by single factor experiment, including the amount of MWCNTs, ultrasonic extraction time and extraction solvent, and the methodological performance was evaluated, including linear range, detection limit, quantification limit, accuracy and precision.Results The detection limits and limits of quantification were 0.002-0.004 mg/kg and 0.007-0.012 mg/kg, respectively. The recoveries of nine pesticides in black tea and green tea were 71.5% -118.8%, and the relative standard deviation (RSD) was 1.00% -6.92%.Conclusion This study successfully established a pesticide residue detection method based on MWCNTs combined with GC-MS/MS, which has the advantages of high sensitivity, high recovery rate and low solvent consumption, and significantly improved the detection efficiency. The actual sample detection shows that this method is suitable for the rapid screening of commercially available tea, and provides reliable technical support for the regulatory authorities. |
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