热带农业科学2025，Vol.45Issue(5)：45-51,7.DOI:10.12008/j.issn.1009-2196.2025.05.007
基于QuEChERS气相色谱串联质谱法的海南田间辣椒虫螨腈动态残留特征
Determination of the Dynamic Residue Characteristics of Chlorfenapyr in Hainan Field Peppers via QuEChERS-GC-MS
摘要
Abstract
Residual determination of chlorfenapyr in pepper was performed via the QuEChERS gas chromatography-tandem mass spectrometry(GC‒MS‒MS/MS)method.The residue behavior of chlorfenapyr in peppers sampled from Hainan fields was evaluated.Sample preparation of pepper samples included extraction with acetonitrile,purification by QuEChERS,and detection by GC‒MS/MS with a matrix external standard method for quantification.The residue behavior of chlorfenapyr on peppers was analyzed via regular picking from fields.At 0.01 to 0.15 mg·kg‒1 levels,the recoveries in pepper ranged from 97.5%to 108.1%,and the relative standard deviations ranged from 1.9%to 3.1%.The limit of quantification(LOQ)was 0.003 mg·kg‒1 in pepper.Dynamic degradation tests in pepper revealed that the degradation followed first-order reaction ki-netics.The half-life T1/2 was 3.5 d.After 18 days of application,the degradation rate of chlorfenapyr in pepper reached 100%.This test method is economical,simple,fast,and accords with the demands of residue analysis of chlorfenapyr in pepper.The degradation rate of chlorfenapyr in pepper is fast,and it is a pesticide that is prone to degradation.At present,there is no maximum chlorfenapyr residue limit for pepper in China.The results will provide a basis for the safe use of chlorfenapyr pes-ticides and offer technical support for the limit standard and the export quality of chlorfenapyr in peppers.关键词
辣椒/虫螨腈/气相色谱—串联质谱法/动态残留分析Key words
pepper/chlorfenapyr/gas chromatography‒tandem mass spectrometry/dynamic residue分类
农业科技引用本文复制引用
王儒,张乐,张欣琪,王婷,赵晓野,潘永波..基于QuEChERS气相色谱串联质谱法的海南田间辣椒虫螨腈动态残留特征[J].热带农业科学,2025,45(5):45-51,7.基金项目
海南辣椒中农药残留消解动态及基质效应研究[国家市场监管重点实验室(热带果蔬质量与安全)](No.KF-2023021). （热带果蔬质量与安全）
