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乙螨唑在9种果蔬中的储藏稳定性

陈增龙 刘子琪 廖先骏 叶子雨 王晓宇 李薇 秦冬梅

陈增龙, 刘子琪, 廖先骏, 叶子雨, 王晓宇, 李薇, 秦冬梅. 乙螨唑在9种果蔬中的储藏稳定性[J]. 农药学学报. doi: 10.16801/j.issn.1008-7303.2021.0061
引用本文: 陈增龙, 刘子琪, 廖先骏, 叶子雨, 王晓宇, 李薇, 秦冬梅. 乙螨唑在9种果蔬中的储藏稳定性[J]. 农药学学报. doi: 10.16801/j.issn.1008-7303.2021.0061
Zenglong CHEN, Ziqi LIU, Xianjun LIAO, Ziyu YE, Xiaoyu WANG, Wei LI, Dongmei QIN. Storage stability of etoxazole in 9 kinds of fruits and vegetables[J]. Chinese Journal of Pesticide Science. doi: 10.16801/j.issn.1008-7303.2021.0061
Citation: Zenglong CHEN, Ziqi LIU, Xianjun LIAO, Ziyu YE, Xiaoyu WANG, Wei LI, Dongmei QIN. Storage stability of etoxazole in 9 kinds of fruits and vegetables[J]. Chinese Journal of Pesticide Science. doi: 10.16801/j.issn.1008-7303.2021.0061

乙螨唑在9种果蔬中的储藏稳定性

doi: 10.16801/j.issn.1008-7303.2021.0061
基金项目: 国家自然科学基金 (31801771);农业虫害鼠害综合治理研究国家重点实验室开放研究基金资助项目 (IPM1919)
详细信息
    作者简介:

    陈增龙,男,助理研究员,从事农药残留与分子毒理学研究,E­mail:chenzenglong@ioz.ac.cn

    通讯作者:

    李薇,共同通信作者 (Co-author for correspondence),女,高级实验师,从事农药残留与标准制定研究,E­mail:liw@ioz.ac.cn

    秦冬梅,通信作者 (Author for correspondence),女,研究员,从事农药登记管理与农药残留分析研究,E­mail:qindongmei@agri.gov.cn

  • 中图分类号: S432.1;TQ450.263;O657.63

Storage stability of etoxazole in 9 kinds of fruits and vegetables

  • 摘要: 建立了乙螨唑在猕猴桃、木瓜、柠檬、茄子、山楂、柿子、甜椒、香蕉以及枣中的气相色谱-质谱 (GC/MS) 分析方法,进而系统研究了−20 ℃条件下乙螨唑在上述果蔬中储藏112 d的稳定性差异及其影响因素。样品经乙腈提取,氨丙基固相萃取柱净化,GC/MS检测分析。结果表明:在0.01~3 μg/g添加水平下,乙螨唑在9种果蔬中的平均回收率在80%~112%之间,相对标准偏差在1.4%~12%之间,定量限为0.01 μg/g。乙螨唑在甜椒中的降解率为9.0%~28.6%,低于30%,储藏相对稳定;在猕猴桃、木瓜、柠檬、茄子、山楂、柿子、香蕉和枣中的降解率均超过30%,不能稳定储藏。乙螨唑储藏稳定性与基质种类、pH值、含水量等密切相关。因此,乙螨唑的残留试验样本不宜长时间储藏,获取后应当尽快检测,以防农药降解导致检测结果偏差。本研究为乙螨唑在多种果蔬作物中的残留检测方法和储藏稳定性提供了基础数据,也为后续乙螨唑的准确定量分析提供了理论参考。
  • 图  1  乙螨唑在不同作物中的降解率

    Figure  1.  Degradation rates of etoxazole in different crops

    表  1  乙螨唑在溶剂和基质中的线性回归参数、基质效应与添加回收率

    Table  1.   Linear regression parameters, matrix effects and spiked recoveries of etoxazole in solvent and matrix

    基质
    Matrices
    回归方程
    Regression equation
    相关系数
    r
    基质效应
    Matrix effect%
    平均回收率 (相对标准偏差)
    Mean recoveries (RSD) (%, n = 5)
    低浓度
    Low
    中浓度
    Medium
    高浓度
    High
    乙腈 Acetonitrile y = 0.532 7x−0.020 3 0.998 5
    猕猴桃 Kiwifruit y = 0.639 5x−0.016 5 0.999 2 20.0 103 (4.2) 94 (8.9) 96 (2.1)
    木瓜 (全果) Papaya (whole fruit) y = 0.477 5x + 0.003 3 0.999 6 −10.4 88 (11.0) 96 (4.1) 97 (10.0)
    木瓜 (果肉) Papaya (pulp) y = 0.629 4x−0.002 9 0.999 8 18.2 85 (9.1) 99 (3.4) 95 (5.8)
    柠檬 Lemon y = 0.392 5x + 0.011 8 0.999 8 −26.3 101 (10.0) 89 (11.4) 87 (11.0)
    茄子 Eggplant y = 0.419 8x−0.001 8 0.999 9 −21.2 102 (12.0) 96 (1.9) 99 (5.3)
    山楂 Hawthorn y = 0.570 9x−0.006 0.999 9 7.2 89 (3.8) 86 (6.5) 80 (6.7)
    柿子 Persimmon y = 0.372 4x−0.013 0.999 0 −30.1 94 (1.7) 89 (8.8) 97 (1.8)
    甜椒 Sweet pepper y = 0.562 6x−0.003 4 0.999 8 5.6 112 (7.0) 96 (2.5) 96 (4.4)
    香蕉 (全果) Banana (whole fruit) y = 0.407 9x−0.000 2 0.999 7 −23.4 97 (9.0) 96 (7.7) 92 (1.4)
    香蕉 (果肉) Banana (pulp) y = 0.415 1x−0.008 3 0.999 6 −22.1 92 (5.1) 94 (4.6) 88 (8.5)
    枣 Jujube y = 0.707 7x + 0.001 7 1.000 0 32.9 101 (12.0) 98 (0.92) 94 (2.2)
    下载: 导出CSV
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