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中国农学通报 ›› 2020, Vol. 36 ›› Issue (29): 132-138.doi: 10.11924/j.issn.1000-6850.casb19010113

所属专题: 植物保护 园艺

• 植物保护·农药 • 上一篇    下一篇

高效液相色谱法测定茶叶中的5种农药残留

丁怡1,2(), 李荣玉1,2,3(), 刘世江1,2, 赵琪君1,2   

  1. 1贵州大学作物保护研究所,贵阳 550025
    2贵州大学农学院,贵阳 550025
    3贵州省山地农业病虫害重点实验室,贵阳 550025
  • 收稿日期:2019-01-22 修回日期:2019-04-24 出版日期:2020-10-15 发布日期:2020-10-16
  • 通讯作者: 李荣玉
  • 作者简介:丁怡,女,1996年出生,贵州普定人,硕士研究生,研究方向:农产品质量安全。通信地址:550025 贵州贵阳花溪区贵州大学西校区崇学楼572,E-mail:761328742@qq.com
  • 基金资助:
    贵州省科技支撑计划项目“水稻农药协同增效及减量施用新技术研究与示范”(黔科合支撑[2016]2534号);贵州省优秀青年科技人才基金“农药在土壤中的吸附行为和生物有效性研究”(黔科合平台人才[2017]5616)

Determination of 5 Kinds of Pesticide Residues in Tea by HPLC

Ding Yi1,2(), Li Rongyu1,2,3(), Liu Shijiang1,2, Zhao Qijun1,2   

  1. 1Institute of Crop Protection, Guizhou University, Guiyang 550025
    2 College of Agriculture, Guizhou University, Guiyang 550025
    3 The Provincial Key Laboratory for Agricultural Pest Management in Mountainous Region, Guiyang 550025
  • Received:2019-01-22 Revised:2019-04-24 Online:2020-10-15 Published:2020-10-16
  • Contact: Li Rongyu

摘要:

建立高效液相色谱法检测茶叶样品中5种农药残留分析方法,以期为茶叶绿色生产提供技术理论支撑。样品经水浸泡后,用正己烷和丙酮混合液(V:V=5:1)振荡提取,乙酸乙酯萃取,经弗罗里硅土和活性炭层析柱净化后,高效液相色谱检测茶叶中5种农药(高效氯氟氰菊酯、氯氰菊酯、联苯菊酯、噻虫嗪和吡虫啉)残留量。结果表明:在0.1~10.0 mg/L范围内,5种农药的色谱峰面积与其浓度均呈良好的线性关系,相关系数均大于0.9994,在0.1、0.5、1 mg/L的添加水平下,5种农药在空白茶叶样品中的平均回收率均在85%~95%之间,相对标准偏差(RSD)在0.55%~2.5%之间。该方法符合农药残留分析实验要求,灵敏度高。

关键词: 茶, 高效液相色谱, 农药残留, 农残分析方法, 绿色生产

Abstract:

To provide technical support for green tea production, HPLC method for determining 5 kinds of pesticide residues in tea samples was established. After soaking in water, the samples were extracted by V (n-hexane): V(acetone)=5:1, then extracted by ethylacetate, purified by floriferous silica and activated carbon column. High performance liquid chromatography (HPLC) was used to determine the pesticides of lambda-cyhalothrin, cypermethrin, bifenthrin, thiamethoxam and imidacloprid in the samples. The results showed that there was a good linear relationship between the chromatographic peak area and the concentration of the 5 pesticides in the range of 0.1-10.0 mg/L. The correlation coefficients were higher than 0.9994. The average recovery rate at three spiked levels of 0.1, 0.5 and 1 mg/L ranged from 85% to 95%, with the relative standard deviation (RSDs) from 0.55% to 2.5% in the blank tea samples. The method could meet the requirements of pesticide residue analysis test and has a high sensitivity.

Key words: tea, HPLC, pesticide residue, pesticide residue analysis method, green production

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