微波萃取气相色谱法测定底泥中邻苯二甲酸酯

Analysis of Phthalic Acid Esters of Environmental Hormone in Sediment Using Microwave-assisted Extraction and Gas Chromatography

为了准确地检测出环境中邻苯二甲酸酯类环境激素,以微波萃取和气相色谱法测定底泥中的6种邻苯二甲酸酯类环境激素.利用正交试验确定了微波优化萃取条件:萃取剂为丙酮/正己烷(体积比为1:1),萃取时间为15 min,萃取压力为0.2 MPa,萃取功率为70%.用气相色谱法测定6种邻苯二甲酸酯类物质,峰面积对浓度线性回归,线性范围为1～500 mg/L,相关系数大于0.99,最低检出限为0.40～4.58 mg/L,精密度为5.9%～12.3%,回收率为60%～120%.利用该方法对2个公园水环境底泥中的6种邻苯二甲酸酯进行检测,结果表明:DMP、DEP、DIBP、DBP、BBP和DEHP均有不同程度的检出,其中,每克土壤中BBP分别为250.6μg和281.2μg,每克土壤中DEHP分别为259.9μg和170.3μg.

To detect the PAEs in environment accurately,a method for the determination of six phthalic acid esters of environmental hormone in sediment samples by using microwave-assisted extraction and gas chromatography was proposed.Several factors that affect recoveries of analytes were optimized by orthogonal design.The optimized results were as follows:extractant was Acetone:hexane(1:1),extraction time was 15 min,extraction pressure was 0.2 MPa,and extraction power was 70%.Linear correlation coefficient was over ...