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中国农学通报 ›› 2023, Vol. 39 ›› Issue (17): 106-112.doi: 10.11924/j.issn.1000-6850.casb2023-0097

• 食品·营养·检测·安全 • 上一篇    下一篇

酶抑制法检测含硫蔬菜中农残假阳性消除

王雯(), 王丽芳, 张瑜, 曹丽芬, 郭柏坤, 王斌()   

  1. 杭州市余杭区食品药品监测中心,杭州 311199
  • 收稿日期:2023-02-15 修回日期:2023-04-05 出版日期:2023-06-15 发布日期:2023-06-12
  • 通讯作者: 王斌,女,1990年出生,山东聊城人,助理工程师,硕士,主要从事食品与农产品质量安全监测方面的研究。E-mail:471451034@qq.com
  • 作者简介:

    王雯,女,1985年出生,浙江杭州人,工程师,学士,研究方向:食品与农产品质量安全监测。通信地址:311199 浙江杭州余杭区储运路398号 杭州市余杭区食品药品监测中心,Tel:0571-89016173,E-mail:

  • 基金资助:
    浙江省市场监督管理局科研计划项目“蔬果中基于酶抑制法的高通量农残快速检测方法研究与应用”(20210136)

Elimination of False Positive of Agricultural Residues in Sulfur-Containing Vegetables by Enzyme Inhibition Method

WANG Wen(), WANG Lifang, ZHANG Yu, CAO Lifen, GUO Baikun, WANG Bin()   

  1. Hangzhou Yuhang Food and Drug Monitoring & Testing Center, Hangzhou 311199
  • Received:2023-02-15 Revised:2023-04-05 Online:2023-06-15 Published:2023-06-12

摘要:

以大蒜为研究对象,建立了一种应用酶抑制法检测含硫蔬菜中农药残留假阳性消除的技术。结合大蒜素的产生原理及对酶抑制反应的影响机理,对比了微波处理法、水浴处理法、磷酸处理法、半胱氨酸处理法4种前处理方法的处理效果及对农药回收率的影响。结果表明,大蒜样品用15%的磷酸处理5 min,蒜氨酸酶灭活效果最佳,可有效消除大蒜素抑制酶活性导致的假阳性结果,农药平均回收率可达到81.75%,其余3种方法均存在回收率低或者无法普遍适用等问题。采用优化后的磷酸处理法对6种代表性含硫蔬菜进行测定,均可达到预期效果,且不影响后续的酶抑制反应,该方法可在酶抑制法快速检测含硫蔬菜农药残留中推广应用。

关键词: 大蒜, 含硫蔬菜, 酶抑制法, 消除, 假阳性

Abstract:

Taking garlic as the research object, this paper established a false positive elimination technique for detecting pesticide residues in sulfur-containing vegetables by enzyme inhibition method. Combing the production principle of allicin and its effect on enzyme inhibition reaction, the pretreatment effects of microwave treatment, water bath treatment, phosphoric acid treatment and cysteine treatment and their effects on the recovery rate of pesticide were compared. The results showed that garlic samples treated with 15% phosphoric acid for 5 min had the best alliinase inactivation effect, which could effectively eliminate the false positive results caused by allicin inhibitory enzyme activity, and the average recovery rate of pesticide could reach 81.75%. Other three treatments had the problems of low recovery rate or could not be widely applied. The optimized phosphoric acid treatment was used for the determination of six representative sulfur-containing vegetables, which could achieve the desired effect and had no effect on the subsequent enzyme inhibition reaction. This method can be applied in the rapid detection of pesticide residues in sulfur-containing vegetables by enzyme inhibition method.

Key words: garlic, sulfur-containing vegetables, enzyme inhibition method, eliminate, false positive