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采用固相萃取(SPE)技术,结合气相色谱/质谱(GC-MS)选择离子检测法(SIM)对水中27种有机农药进行提取、净化、浓缩前处理,实验优选出了分离效果较好的色谱柱VF-1701 ms(30 m×0.25 mm×0.25μm),优化了固相萃取及GC-MS的分析条件,建立了水样中7类27种有机农药的SPE-GC-MS/SIM分析方法。样品中各组分曲线相关系数R2均大于0.9981,检测限为0.015~0.054μg/L,平均加标回收率为72.8%~110.8%,相对标准偏差RSD为5.5%~16%。与传统方法相比,该法无需对有机污染物进行分类处理,可以同时快速测定7类27种有机农药。
27 kinds of organic pesticides in water were extracted by solid phase extraction (SPE) and combined with gas chromatography / mass spectrometry (GC-MS) selective ion detection (SIM) to purify and concentrate pretreatment. The results showed that the separation effect was better The SPE-GC-MS / SIM analysis of seven classes of 27 organic pesticides in water samples was established with VF-1701 ms (30 m × 0.25 mm × 0.25 μm) column and optimized analytical conditions of SPE and GC- method. The correlation coefficient R2 of each component in the sample was greater than 0.9981, the detection limit was 0.015 ~ 0.054μg / L, the average recovery was 72.8% ~ 110.8%, and the relative standard deviation was 5.5% ~ 16%. Compared with the traditional method, this method does not need to classify organic pollutants and can simultaneously determine seven kinds of 27 kinds of organic pesticides.