浊点萃取-石墨炉原子吸收光谱法测定环境样品中的镉  

Determination of Cadmiun In Environmental Samples by Graphite Furnace Atomic Absorption Spectrometry with Cloud Point Extraction

作　　者：宋雪洁[1,2] 刘欣丽[1] 段太成[1] 陈杭亭[1] 

机构地区：[1]中国科学院长春应用化学研究所,长春130022 [2]扬子江药业集团质量管理部,泰州225321

出　　处：《分析化学》2009年第6期893-896,共4页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金(Nos.20677057,20605021)资助

摘　　要：建立了浊点萃取分离富集石墨炉原子吸收光谱法测定环境样品中痕量镉的方法。浊点萃取选择8-羟基喹啉为螯合剂,Triton X-100为表面活性剂。在pH8～9、0.01%8-羟基喹啉和0.2%-Triton X-100、80℃水浴20 min的优化条件下,所建立方法的检出限为2.5 ng/L;加标回收率为94.6%～106.2%;对样品溶液进行富集的富集因子为17。利用该方法分别测定了2个实际水样和2个国家标准参考物质中的总镉含量,结果令人满意。A method for the determination of Cd in environmental samples by graphite furnace atomic absorp- tion spectrometry with cloud point extraction was established. The optimum extract conditions were pH 8 -9, 100 mg/L of 8-Oxine, 10% （v/v） of Triton X-100 and heating at 80℃ for 20 min. It is found that under optimal conditions, the established method could achieve a detection limit of 2.5 ng/L, with a preconcentra- tion factor of 17 ; while the recovery test results of 94.6% - 106.2% and the satisfactory analytical results for standard reference materials analysis indicated the accuracy of the method. For practical application, two water samples were analyzed with the established method.

关 键 词：浊点萃取 镉 环境样品 石墨炉原子吸收光谱法 

分 类 号：X830.2[环境科学与工程—环境工程]