【摘要】 利用固相萃取技术富集了水中4种邻苯二甲酸酯类(PAEs)化合物:邻苯二甲酸二甲酯(DM P)、邻苯二甲酸二乙酯(DEP)、邻苯二甲酸二丁酯(DBP)、邻苯二甲酸二(2-乙基己基)酯(DEHP)。借助均匀设计法及计算机回归建模优化技术对4种PAEs的固相萃取条件进行了设计与优化,得到的最佳固相萃取条件:洗脱剂配比(正己烷与丙酮的体积比)30∶1,洗脱体积2mL,洗脱速率4mL/m in,上样速率8mL/m in。富集后的试样用带电子捕获器的毛细管气相色谱仪检测,方法的线性范围为1~1 000μg/L(DMP,DEP),0.2~100μg/L(DBP,DEHP),线性回归方程的相关系数为0.997 0~1.000 0,检出限为0.02~0.4μg/L,4种PAEs的回收率为69%~117%,相对标准偏差为2.5%~9.5%。更多还原

【Abstract】 4 kinds of phthalic acid esters(PAEs)in water were enriched by solid phase extraction(SPE)technology,namely dimethyl phthalate(DMP),diethyl phthalate(DEP),dibutyl phthalate(DBP),di-2-ethylhexyl phthalate(DEHP).The optimum SPE conditions of the 4 PAEs were obtained by homogeneous design and computer regression modeling method,which are:the volume ratio of hexane to acetone 30 ∶1,eluent volume 2mL,eluent rate 4mL/min and sample rate 8mL/min.The enriched samples were determined using a capillary gas chromatograph with electron capture detector.The linear response of the proposed method are in the range of(1-1 000)μg/L(DMP、DEP)and 0.2-100μg/L(DBP、DEHP).The correlation coefficients of the linear regression equations are 0.997 0-1.000 0.The detection limit is(0.02-0.4)μg/L.The recoveries of the 4 PAEs are(69%-117%) and the relative standard deviations are(2.5%-9.5%).更多还原