加速溶剂萃取-气相色谱法测定土壤中的有机磷农药  

DETERMINATION OF ORGANOPHOSPHORUS PESTICIDES IN SOIL BY ACCELERATED SOLVENT EXTRACTOR-GAS CHROMATOGRAPHY

作　　者：孙欣阳[1] 顾海东[1] 秦宏兵[1] 

机构地区：[1]苏州市环境监测中心站,苏州215004

出　　处：《化学分析计量》2008年第6期46-48,共3页Chemical Analysis And Meterage

摘　　要：采用加速溶剂萃取-气相色谱法测定土壤中有机磷农药。土壤样品与无水硫酸钠混合后，再加适量中性氧化铝和活性碳，用丙酮-二氯甲烷在加速溶剂萃取仪土于10．3MPa、60℃条件下提取10min，用FPD检测器进行分析：土壤中7种有机磷农药的回收率为85．5％～102．7％，测定结果的相对标准偏差为5．7％～13．0％（n=6），检出限为0．03～0．07μg/kg。该法具有良好的分离效果、较宽的线性关系和较高的灵敏度。Organophosphorus pesticides were determined by accelerated solvent extractor（ASE） -gas chromatography. The soil sample was blend with Na2SO4, the right amount neutral aluminum oxide and the activated carbon were added. The sample was extracted with acetone - methylene chloride on acceleration solvent extraction meter at 10.3 MPa, 60℃, for 10 min, then analysed with FPD detector. The recoveries of organophosphorus pesticides were 84.2% - 103.5% , the RSD of determination results were 5.7% - 13.0% （n=6）, the detection limits were 0.03 -0.07 μg/kg. This method has high sensitivity, precision, and wide linearity.

关 键 词：加速溶剂提取 有机磷农药 气相色谱 土壤 

分 类 号：O657.71[理学—分析化学] X132[理学—化学]