摘要
建立了气相色谱质谱法检测6种有机磷农药（敌敌畏、内吸磷、乐果、甲基对硫磷、马拉硫磷、对硫磷）在水中残留量的方法。在优化样品前处理方法的基础上，选用DB-5MS（30m×0．25mm×O．25μm）毛细管色谱柱测定水样品中6种有机磷农药的含量。结果表明，在0．0002—0．005mg／L添加水平范围内，6种有机磷农药的平均添加回收率为79．8％～104．8％，相对标准偏差（RSD）为1．14％～4．84％，小于5％（n=5）。该方法操作简便，杂质干扰少，灵敏度、准确度高。
A method for determining six organophosphorus pesticides （dichlorvos, demeton, dimethoate, methyl parathion, malathion, parathion） residues in water was established based on gas chromatography-mass spectrometry. After optimizing the sample preparation method, DB-5MS （30 m × 0.32 mm × 0.25 μm） capillary column was used to measure the six organophosphorus pesticides contents in water. The results show that,when spiked levels of six organophosphorus pesticides are between 0.0002-0.005 mg/L, quantitative recoveries are 79.8%-104.8%, the relative standard deviation （RSD） is 1.14%-4.84%, less than 5%（n = 5）. This method is simple and rapid, has less imouritv interference and has high sensitivity and accuracy.
出处
《辽宁化工》
CAS
2015年第8期1011-1013,共3页
Liaoning Chemical Industry
关键词
有机磷农药
水
气相色谱-质谱法
organophosphorus pesticides
water
gas chromatography-mass spectrometry
