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中国农学通报 ›› 2021, Vol. 37 ›› Issue (17): 129-136.doi: 10.11924/j.issn.1000-6850.casb2020-0216

所属专题: 植物保护 园艺

• 食品·营养·检测·安全 • 上一篇    下一篇

气相色谱法测定蔬菜和水果中有机磷及拟除虫菊酯类农药残留不确定度分析

于婷婷1(), 邱鹏程2(), 陈强1, 石富1, 杨雅钧1   

  1. 1内蒙古鄂尔多斯市农畜产品质量安全中心,内蒙古鄂尔多斯 017000
    2内蒙古鄂尔多斯市农牧业科学研究院,内蒙古鄂尔多斯 017000
  • 收稿日期:2020-06-29 修回日期:2020-09-04 出版日期:2021-06-15 发布日期:2021-06-29
  • 通讯作者: 邱鹏程
  • 作者简介:于婷婷,女,1981年出生,内蒙古海拉尔人,工程师,硕士,研究方向为农畜水产品中农兽药残留及违禁添加物的检测。通信地址:017000 内蒙古鄂尔多斯市东胜区铁西亿昌现代城B座26楼,E-mail:26286496@qq.com
  • 基金资助:
    内蒙古农牧业科学院青年创新基金项目“蒙西地区玉米产量差研究及产量限制因素分析”(2017QNJJN06);内蒙古自治区科技成果转化专项“粮饲兼用玉米新品种伊单131集成配套技术推广”(2019CG070)

Evaluation of the Uncertainty in Determining Organophosphorus and Pyrethroid Pesticides Residue in Vegetables and Fruits by Gas Chromatography

Yu Tingting1(), Qiu Pengcheng2(), Chen Qiang1, Shi Fu1, Yang Yajun1   

  1. 1Ordos Agricultural and Livestock Product Quality and Safety Center,Ordos Inner Mongolia 017000
    2Ordos Academy of Agricultural and Animal Husbandry Sciences, Ordos Inner Mongolia 017000
  • Received:2020-06-29 Revised:2020-09-04 Online:2021-06-15 Published:2021-06-29
  • Contact: Qiu Pengcheng

摘要:

本文旨对气相色谱法测定蔬菜和水果中有机磷及拟除虫菊酯类农药残留量的不确定度进行评定。以NY/T 761—2008标准方法为研究对象,选择毒死蜱和甲氰菊酯分别代表方法的第一部分和第二部分,从样品前处理过程、仪器测定、标准溶液配制等7个方面对方法的测量不确定度进行了评估。毒死蜱和甲氰菊酯农药残留的相对扩展不确定度分别为0.9%和1.0%(k=2),其中气相色谱仪峰面积、标准溶液配制和加标回收率引入的不确定度分量是主要来源。为降低检测结果的不确定度,在实际检测工作中应从提高设备稳定性、简化标准溶液配制过程和提升检测人员操作能力等方面改善,并将不确定度结果应用于检测数据处于限量临界值的判断中。

关键词: 不确定度, 农药残留, 气相色谱, 有机磷类农药, 拟除虫菊酯类农药

Abstract:

The uncertainty of measuring organophosphorus and pyrethroid pesticides residue in vegetables and fruits by gas chromatography was evaluated in this study. Taking NY/T 761—2008 standard method as the research object, chlorpyrifos and fenpropathrin were selected to represent the first and second parts of the method respectively and the uncertainty of the method was evaluated from seven aspects including the sample pretreatment process, instrument measurement and standard solution preparation etc. The relative expanded uncertainty of chlorpyrifos and fenpropathrin pesticide residue is 0.9% and 1.0% (k=2) respectively, among which the uncertainty component introduced by gas chromatograph peak area, standard solution preparation and standard recovery rate are the main source. In order to reduce the uncertainty of test results, it is necessary to improve the stability of equipment, simplify the preparation process of standard solution and improve the operation ability in practice. Simultaneously, the results of uncertainty should be applied to judge whether the detection data is to be in the critical value of limit.

Key words: uncertainty, pesticide residue, gas chromatography, organophosphorus pesticides, pyrethroid pesticides

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