HPLC-MS/MS检测琯溪蜜柚中乙唑螨腈残留量及套袋对残留的影响  

SYP-9625 Residue in Citrus grandis‘Guanxi miyou’Tested by HPLC-MS/MS and Bagging Effect on Residue

作　　者：赖添财[1] Lai Tiancai(Zhangzhou Agricultural Test and Inspection Centre,Zhangzhou 363000,Fujian,China)

机构地区：[1]漳州市农业检验监测中心

出　　处：《农学学报》2019年第11期63-66,共4页Journal of Agriculture

基　　金：2018年漳州市自然科学基金项目“琯溪蜜柚中多残留QuEChERS HPLC-MS/MS检测方法的建立及套袋控残技术研究”(2018N02020057)

摘　　要：为了评价乙唑螨腈在琯溪蜜柚上的安全性,研究其残留降解动态。设计套袋和非套袋2种处理,按推荐剂量和加倍推荐剂量在蜜柚上各施药1次进行田间试验,采用高效液相色谱-串联质谱法进行残留检测。结果表明:乙唑螨腈在0.4~400μg/L浓度范围内具有良好的线性关系(r2=0.9997),检出限为0.06μg/kg,添加回收率为84.2%~90.0%,RSD为5.6%~8.4%。乙唑螨腈在蜜柚上的降解规律符合一级动力学关系,降解系数(k)在0.1444~0.2271之间,套袋处理的半衰期(T1/2)为3.56~4.80天,未采用套袋处理的T1/2为3.05~3.50天。套袋处理的半衰期大于未采用套袋的半衰期,施药后65天最终产品中均未检出乙唑螨腈残留。To evaluate the safety of SYP-9625 in Citrus grandis‘Guanxi miyou’, study the residual degradation dynamics of SYP-9625, we designed 2 treatments of bagging and no-bagging, sprayed SYP-9625 once with the recommended dose or double recommended dose, and determined the residues by HPLC-MS/MS. The results showed that: there was a good linear relationship(r^2=0.9997) in the range of 0.4-400 μg/L of SYP-9625,andthedetectionlimit(LOD),therecoveriesandtherelativestandarddeviations(RSD) was 0.06 μg/kg,84.2%-90.0% and 5.6%-8.4%, respectively;the residual degradation dynamics of SYP-9625 accorded with the first order kinetic equation(k 0.1444-0.2271), and the half-life(T1/2) of bagging and no-bagging treatment was 3.56-4.80 days and 3.05-3.50 days, respectively;SYP-9625 degraded more slowly in bagging treatment,and the residue of SYP-9625 was not detected in all final products 65 days after the application.

关 键 词：乙唑螨腈 高效液相色谱-串联质谱 残留 蜜柚 套袋 

分 类 号：X592[环境科学与工程—环境工程]