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
-
摘要: 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.Abstract: 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 0.99.The range of linear was 1~500 mg/L.The limits of detection was between 0.40 and 4.58 mg/L. The repeatability expressed as relative standard deviation was between 5.9%and 12.3%.The method was applied to analyze six phthalic acid esters of environmental hormone in sediment of park water environment. Six phthalic acid esters were determined by different degrees.The volumes of BBP were 250.6μg per gram of soil and 281.2μg per gram of soil, while the volumes of DEHP were 259.9μg per gram of soil and 170.3μg per gram of soil.