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目的了解海东地区大棚蔬菜中有机磷农药残留情况。方法 2014年8月用梅花形抽样法采取海东地区5个乡镇大棚蔬菜样品106份,利用气相色谱-质谱法进行有机磷农药的残留量检测。结果检出44个有机磷农药残留样品和28个超标样品,检出率和超标率分别为41.51%和26.42%,且差异均有统计学意义(χ2=7.007,P=0.030,χ2=7.857,P=0.020),检出国家明令禁止的高毒禁用农药,检出率达13.21%,农药联合使用情况较为普遍。结论海东地区大棚蔬菜有机磷农药使用普遍,检出率和超标率高,还有违规使用高毒禁用农药和联合使用有机磷农药情况。
Objective To understand the organophosphorus pesticide residues in greenhouse vegetables in Haidong area. Methods In August 2014, 106 samples of greenhouse vegetable from five townships in Haidong were collected by plum blossom sampling method. The residues of organophosphorus pesticides were detected by gas chromatography-mass spectrometry. Results 44 organophosphorus pesticide residue samples and 28 excess samples were detected. The detection rates and the excess rates were 41.51% and 26.42%, respectively, and the differences were statistically significant (χ2 = 7.007, P = 0.030, χ2 = 7.857, P = 0.020), the detection of banned highly toxic pesticides banned by the state, the detection rate of 13.21%, the joint use of pesticides is more common. Conclusion The use of organophosphorus pesticides in greenhouses in Haidong area is common. The detection rate and over-standard rate are high. There are also cases of banned pesticides and organophosphorus pesticides in combination with high toxicity.