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目的:了解绵阳市蔬菜、水果和粮食中四种有机氯农药残留量及其分布规律,为制定切实有效的预防控制措施提供科学依据。方法:从绵阳各类超市、农贸市场和农户购买蔬菜、水果和粮食样品,采用气相色谱法进行分析。结果:样品中六六六、滴滴涕、三氯杀螨醇和艾氏剂残留检出率分别为76.5%、63.5%、32.5%和14.0%,三氯杀螨醇和艾氏剂超标率分别为3.0%和0.5%,其他未超标。蔬菜、水果和粮食农残检出率无显著性差异(P>0.05)。四种农药的检出率有显著性差异(P<0.05)。三种不同来源样品农残超标率无显著性差异(P>0.05)。全年四个季度以第二季度的农残超标率最高,为5.9%。结论:绵阳市蔬菜、水果和粮食中四种有机氯农药残留检出率较高。
Objective: To understand the four organochlorine pesticide residues and their distribution in vegetables, fruits and grains in Mianyang City, and provide a scientific basis for formulating effective prevention and control measures. Methods: Vegetables, fruits and grain samples were purchased from all kinds of supermarkets, farmers’ markets and farmers in Mianyang and analyzed by gas chromatography. Results: The detection rates of residues of BHC, DDT, dicofol and aldrin were 76.5%, 63.5%, 32.5% and 14.0% respectively in the samples. The overdosage rates of dicofol and aldrin were 3.0% and 0.5% Exceeded. There was no significant difference in the detection rate of vegetables, fruits and food pesticides (P> 0.05). The detection rate of four pesticides was significantly different (P <0.05). There was no significant difference in the standard of pesticide residue between the three samples from different sources (P> 0.05). In the fourth quarter of the year, the highest rate of pesticide residues in the second quarter was 5.9%. Conclusion: The detection rates of four organochlorine pesticide residues in vegetables, fruits and grains in Mianyang City are higher.