不同清洗方法对韭菜中有机磷类农药去除 效果的研究

目的研究不同清洗方法对韭菜中有机磷农药残留的去除效果。方法将二嗪磷、毒死蜱、乐果、杀扑磷和亚胺硫磷农药污染的韭菜分别以家庭中易于实现的洗涤方法(清水、面粉水、碱水、醋水、淘米水、盐水)浸泡清洗,采用气相色谱法测定不同清洗方法对韭菜中5种有机磷农药的去除效果。结果 6种清洗方法均能去除韭菜中的二嗪磷、毒死蜱、乐果、杀扑磷和亚胺硫磷农药,其中淘米水和碱水的去除效果最好。亚胺硫磷在5种有机磷农药中最容易被清洗去除。同时随着淘米水放置时间的增加,淘米水去除有机磷农药的效果也会增加。结论日常生活中使用的清洗方式,均能降低韭菜中5中有机磷农药的残留,但去除效果存在差异,淘米水清洗对韭菜中有机磷农药的去除效果最好。

Removal efficiency of organophosphorus pesticides in Chinese chives by dif-ferent rinsing methods

Objective] To study the effect of different rinsing methods to remove Chinese chives. Methods] Chinese chives contaminated by chlorpyrifos, dimethoate, diazinon, methidathion and phosemet was rinsed in water, flour water, caustic soda water, rice vinegar water, rice water and salt water respectively. The gas chromatography was used to analyze the organophosphorus pesticides residues in Chinese chives rinsed by different method. Results] Six kinds of rinsing methods all can remove chlorpyrifos, dimethoate, diazinon, methidathion and phosemet from Chinese chives. The rice water gave the best results among these six rinsing methods. And the phosemet was more likely to be rinsing from the Chinese chives. At the same time, with the increase of the place time of rice water, the ability of rice water to remove the effects of organophosphorus pesticide will increase. Conclusion] The six rinsing methods of daily use can reduce the organophosphorus pesticides residual quantity, but removal rate is different. Among all these methods, rice water is most effective.