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蔬菜样品经乙腈提取,上清液蒸发至近干,加入正己烷溶解残渣后经多壁碳纳米管固相萃取柱(100mg/6mL)净化。以正己烷洗脱,收集流出液,蒸发至近干,加正己烷定容为5.00mL,供气相色谱分析。分别用ZB-2和DB-5MS色谱柱进行分离,用电子捕获检测器进行检测。所得甲氰菊酯的线性范围为0.075～1.25mg·L-1,用ZB-2和DB-5MS色谱柱的检出限(3S/N)分别为1.07,0.769mg·kg-1。在0.075,0.25,1.00mg·kg-1 3个添加水平下进行回收试验,甲氰菊酯的回收率在83.9%～103%之间,相对标准偏差(n=6)在0.60%～3.2%之间。
The vegetable sample was extracted with acetonitrile, the supernatant was evaporated to near dryness, and the residue was dissolved in n-hexane to be purified by a multi-wall carbon nanotube solid phase extraction column (100 mg / 6 mL). Elution with n-hexane, the effluent was collected, evaporated to near dryness, n-hexane was added to a constant volume of 5.00mL for gas chromatographic analysis. Separate with ZB-2 and DB-5MS columns, respectively, with an electron capture detector. The linear range of the obtained fenpropathrin was 0.075-1.25 mg · L -1, and the detection limits (3S / N) of ZS-2 and DB-5MS were 1.07 and 0.769 mg · kg -1, respectively. The recoveries of fenpropathrin ranged from 83.9% to 103% and the relative standard deviations (n = 6) ranged from 0.60% to 3.2% with the recoveries of 0.075, 0.25 and 1.00 mg · kg- between.