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建立了凝胶色谱柱净化蔬菜样本,毛细管气相色谱 火焰光度检测器测定15种有机磷农药的方法。用环己烷 乙酸乙酯(体积比为1∶1)淋洗液以1mL/min的流量洗脱凝胶色谱柱(10mmi d ×200mm,SX 3),分别用气相色谱检测各段流出液中农药的含量,得到了15种有机磷农药的凝胶色谱流出曲线。采用该方法检测,15种有机磷农药在黄瓜、番茄和青椒中的最小检出质量比均低于5×10-3mg/kg,在蔬菜中不同添加浓度的平均回收率为77 8%～106%,相对标准偏差(RSD)为0 10%～16 6%,其准确度和精密度均达到了农药残留分析的要求。
A method for determination of 15 organophosphorus pesticides by gel column chromatography and capillary gas chromatography flame photometric detector was established. The column was eluted with cyclohexane-ethyl acetate (1: 1 by volume) eluant at a flow rate of 1 mL / min (10 mm × d × 200 mm, SX 3), and each fraction was detected by gas chromatography Pesticide content, obtained 15 kinds of organophosphorus pesticide gel permeation curve. The minimum detectable mass ratio of 15 organophosphorus pesticides in cucumber, tomato and green pepper was less than 5 × 10-3mg / kg, and the average recoveries of different concentrations in vegetables were 77.8% -106 %, And the relative standard deviations (RSDs) ranged from 10% to 16 6%. The accuracy and precision of these pesticides met the requirements of pesticide residue analysis.