防虫蛀纯羊毛绒线中Permethrin残留量的GC/MS测定

Determination of permethrin residues in wool knitting products with gas chromatography/mass spectrometry

毛绒织物样品以 1∶1丙酮—正己烷混合溶剂超声提取后 ,提取液经Celite层析柱净化 ,40℃旋转蒸发浓缩、定容 ,由色—质联用仪测定试样中的氯菊酯 (Permethrin)含量。本方法对目标化合物的检测限量在 0 1～0 5mg kg范围内 ,平均回收率介于 89 1%～ 10 1 2 %之间 ,相对标准偏差为 2 3%～ 4 4 %。

A procedure is described for the identification and conformation of trans/cis permethrin in insectproof pure wool products. GC/MS in the selective ion monitoring mode was used to analysis and quantitate residues extracted from textile samples being soaked in 1:1 acetone-hexane with supersonic treatment at 40 ℃ water bath and clean-up with reversed-phase solid-phase extraction. A standard wool fabrics was used as a sample matrix to simplify the target compound-matrix interaction. The method provided very good linearity data with low coefficients of variation. Typical limits of detection (LOQs) were 0.1～0.5 mg/kg for target compounds. Average recoveries from fortified sample fabrics are between 89.1%～101.2%. The relative standard deviations of the residues are 2.3%～4.4% for all fabrics tested.