流动注射-固相萃取-光度法测定环境水样中的Cr（Ⅵ）

摘要

A spectrophotometric method for determining Cr（Ⅵ） in environmental water samples based on flow injection combined with a solid phase extraction column using cigarette filter as extraction material was proposed.Under the optimized condition,the linear calibration ranges were 0.1～4.0 μg/L,the relative standard deviation of 11 measurements was 4.3% for 1.0 μg/L Cr（Ⅵ）,and the detection limit of the method was estimated to be 0.02 μg/L.The method was successfully applied to the determination of Cr（Ⅵ） in actual environmental wastewater samples with the adding standard recovery in the range of 94%～110%.%用香烟过滤嘴制为材料自制了固相萃取柱,结合流动注射,建立了环境水样中Cr（Ⅵ）光度测定方法.对该方法进行优化,在Cr（Ⅵ）浓度0.1～4.0μg/L范围内具有较好的线性关系,1.0μg/L的Cr（Ⅵ）标样经11次测量,相对标准偏差为4.3%,方法检出限为0.02μg/L.对实际水样进行检测,加标回收率在94%～110%之间.