摘要
用三氯甲烷将废水中的有机磷农药乐果、甲基对硫磷、乙基对硫磷分三次萃取，将全部三氯甲烷萃取液合并，并通过层析柱脱水干燥。用岛津气相色谱仪ＧＣ—１４Ｂ、火焰光度检测器 ＦＰＤ 测定有机磷农药的含量。该方法具有分析速度快、准确度高、检测下限低等优点。方法的回收率为９４．５％一９７．９％，相对标准偏差在４．６％以内，检测限为 ０ ．０２ｍｇ／Ｌ。
Organic phosphorous pesticides, usch as rogor, methyl -- parathion, aethylis -- parathion, in waste water are extracted by chloroform with three times. All these extractants are dried by separative column. The content of organic phosphorous pesticide is detected by gas chromatographic instrument, with FPD detector. This method has many advantages, such as rapid analysis, high precision and good detectability. In addition, by using this method the recovery is 94. 5 %-97. 9 %, the relative standard deviation is less than 4. 6 %, and the detection limit is 0. 02mg/L.
出处
《现代科学仪器》
1999年第3期34-35,共2页
Modern Scientific Instruments
关键词
气相色谱法
废水
有机磷农药
测定
Gas chromatography Waste water Organic phosphorous pesticide
