食品科学 ›› 2020, Vol. 41 ›› Issue (16): 327-331.doi: 10.7506/spkx1002-6630-20200302-028

• 安全检测 • 上一篇    

气相色谱-负化学源-串联质谱法测定动物源食品中氟虫腈及其4 种代谢产物残留量

韩超,胡贝贞,金娜,刘滨,沈燕,金建昌,陈树兵,   

  1. (1.浙江树人大学生物与环境工程学院,浙江 杭州 310015;2.绍兴海关综合技术服务中心,浙江 绍兴 312000;3.温州海关综合技术服务中心,浙江 温州 325027;4.宁波海关技术中心,浙江 宁波 315040)
  • 发布日期:2020-08-19
  • 基金资助:
    浙江树人大学科研启动费项目(2019R024)

Determination of Fipronil and Four Metabolites in Animal-Derived Foods by Gas Chromatography-Negative Chemical Ionization-Tandem Mass Spectrometry

HAN Chao, HU Beizhen, JIN Na, LIU Bin, SHEN Yan, JIN Jianchang, CHEN Shubing,   

  1. (1. College of Biology and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310015, China;2. Comprehensive Technical Service Center of Shaoxing Customs, Shaoxing 312000, China;3. Comprehensive Technical Service Center of Wenzhou Customs, Wenzhou 325027, China;4. Technology Center of Ningbo Customs, Ningbo 315040, China)
  • Published:2020-08-19

摘要: 建立动物源食品(鸡蛋、鸡肉、鸡肝)中氟虫腈及其4 种代谢产物(氟甲腈、氟虫腈砜、氟虫腈硫醚、酰胺氟虫腈)残留量的气相色谱-负化学源-串联质谱(gas chromatography-negative chemical ionization-tandem mass spectrometry,GC-NCI-MS/MS)测定方法。样品经乙腈(正己烷饱和)提取后,采用改进的QuEChERS净化和GC-NCI-MS/MS的多反应监测模式检测,基质匹配工作曲线法定量。实验结果表明,氟虫腈及其4 种代谢产物在1~100 μg/L质量浓度范围内线性良好,线性系数均大于0.999 0,氟甲腈、氟虫腈和氟虫腈硫醚定量限(RSN≥10)为0.5 μg/kg,氟虫腈砜和酰胺氟虫腈定量限为1.0 μg/kg。在2.0、10.0、20.0 μg/kg加标水平下,回收率在80.2%~108.7%之间,相对标准偏差为3.8%~10.2%。该方法灵敏度高、准确性好,能够满足动物源食品中氟虫腈及其4 种代谢产物残留量的测定。

关键词: 动物源食品;氟虫腈;代谢产物;气相色谱-负化学源-串联质谱

Abstract: A gas chromatography-negative chemical ionization-tandem mass spectrometry (GC-NCI-MS/MS) method for the determination of the residues of fipronil and its four metabolites (fipronil desulfinyl, fipronil sulfone, fipronil sulfide, and fipronil carboxamide) in animal-derived foods (egg, chicken, and chicken liver) was established. The samples were extracted with acetonitrile (saturated with n-hexane), and the extract was cleaned up using the quick, easy, cheap, effective, rugged, and safe (QuEChERS) method before being detected by GC-NCI-MS/MS in the multi-reaction monitoring (MRM) mode. The matrix matched standard curve method was used for quantitation. Results showed that there was a good linearity for all analytes in the range of 1–100 μg/L with correlation coefficient (r2) higher than 0.999 0. The limit of quantitation (LOQ, RSN ≥ 10) of the method was 0.5 μg/kg for fipronil disulfonyl, fipronil, fipronil sulfide and 1.0 μg/kg for fipronil sulfone and fipronil carboxamide. The average recoveries at three spiked concentration levels (2.0, 10.0, and 20.0 μg/kg) were 80.2%–108.7% with relative standard deviations (RSDs) of 3.8%–10.2%. This method exhibited high sensitivity and accuracy, and could be used for the determination of the residues of fipronil and its four metabolites in animal-derived foods.

Key words: animal-derived foods; fipronil; metabolites; gas chromatography-negative chemical ionization-tandem mass spectrometry

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