孝感市农产品中有机磷农药残留量调查

Residual Quantity of Organophsphorous Pesticides in Farm Producs of Xiaogang City

目的 通过对豆类、叶菜类及根茎类蔬菜、水果中4种常用的有机磷农药残留量的检测,了解有机磷农药在孝感市农产品中的残留及其分布规律。方法 采用国家标准方法气相色谱(GC)法进行操作。结果 三类农产品中有机磷农药检出率为71.0 % ,其中豆类检出率为83.3% ,4种有机磷农药中以甲基对硫磷检出率最高,为4 5 .2 %。对叶菜不同采摘时间农药残留量的检测施药后最高残留量5 d为10 7.3μg/ kg,10 d为4 1.4μg/ kg,15 d后为1.7μg/ kg;不同种类的农产品其有机磷农药残留,豆类为18.5 0μg/ kg,叶菜类11.4 2μg/ kg,瓜果类4 .37μg/ kg,根茎类0 .17μg/ kg;蔬菜随着清洗次数的增加,其有机磷农药的残留量下降。结论 应提倡合理使用农药。

Objective This research was aimed to know the residual quantity and distributing feature of Organic phosphorous (OPPs) in farm producs by examining the contents of four kinds of usually used OPPs pesticides in beans,vegetables and fruits.Methods The residual quantity of the OPPs in foods were determined by the methods according to the China Standard by GC.Results The rate of monitored OPPs in three kinds of farm products is 71.0%,of which the rate of beans is 83.3%; the rate of parathion is 45.2%.By examining the content of remnants of OPPs in leaf vegetables by different picking time, the highest remnants after using OPPs were:107.3 μg/kg for 5 days,41.4 μg/kg for 10 days and 1.7 μg/kg after 15 days. The average contents of remnants of OPPs in different farm products were different: 18.5 μg/kg for beans,11.42 μg/kg for leaf vegetables and 4.37 μg/kg for melons and fruits,0.17 μg/kg for roots.The residual content of OPPs on food can be reduced by washing with clean water.Not only can the OPPs cause acute poisoning and death,but also the remnant in foods can create chronic harm to human body.Conclusions In agriculture production, rational use,scientific planting and proper picking time after using OPPs is advocated.