食用林产品中氨基甲酸酯类农药残留量测定

Determination of carbamate pesticide residues in edible forest products

建立了分散固相萃取-高效液相色谱-串联质谱联用法测定食用林产品（香菇）中14种氨基甲酸酯类农药残留量的方法。样品经乙腈提取,PSA和少量GCB混合吸附剂分散固相萃取净化,然后采用HPLC-MS/MS测定,外标法定量。14种氨基甲酸酯类农药在0.005～0.100 0 mg/L范围内线性良好,相关系数均大于0.995 8。在0.01～0.05 mg/kg浓度范围内,14种目标物的平均加标回收率为70.0%～104.5%,相对标准偏差为3.2%～9.1%。该方法简单、快速、灵敏,可满足香菇中14种氨基甲酸酯类农药残留的检测需要。

Developed a method for determination of 14 earbamate pesticides in edible forest preduet （mushroom） by dispersive solid-phase extraction cleanup and high performance liquid chromatography-tandem mass spectrometry. The sample was extracted by acetonitrile and purified by PSA powder with a little GCB powder. Then the target was determined and confirmed by HPLC - MS/MS using external standard method. The results indicated that the calibration curves of 14 carbamete pesticides showed good linear relationship in the concentration of 0. 005 ～ 0. 100 0 mg/L with correlation coeffi- dents greater than O. 995 8. The recoveries of the 14 carbamate pesticides in mushroom （ from 0. 01 to 0. 05 mg/kg ） ranged from 70. 0% to 104. 5% with the relative standard deviation （RSD） ranged from 3.2% to 9. 1%. The method was simple, fast and sensitive. It was also demonstrated that this analysis method was suitable for simultaneous determina- tion of 14 carbamate pesticides in edible forest food.