冠醚交联壳聚糖在Cr(Ⅲ、Ⅵ)分析中的应用  

Study on Application of Crown Ether Cross-linked Chitosan to Analysis of Chrome (III、VI)

作　　者：张淑琴[1] 汪玉庭[1] 唐玉蓉[1] 

机构地区：[1]武汉大学资源与环境科学学院,武汉430072

出　　处：《上海环境科学》2003年第1期39-41,56,共4页Shanghai Environmental Sciences

基　　金：国家教育部博士点基金资助项目编号2000048615

摘　　要：研究冠醚交联壳聚糖(DCTS)对铬的吸附行为,建立了DCTS富集分离测定环境水样中痕量铬Cr(Ⅲ、Ⅵ)的新方法。在pH=7.5的溶液中,DCTS对铬的吸附率为100%,富集倍数可达50倍以上,用0.20g/L酒石酸2mL溶液可定量解吸总铬,用0.20g/L柠檬酸溶液2mL可定量解吸Cr(Ⅲ)。本法用于配置的南极水样中超痕量Cr(Ⅲ、Ⅵ)的测定,回收率98%～112%,变异系数1.8%,检出限0.004μg/L。The adsorption behaviors of a novel type of crownether cross-linked chitosan for chrome (III, VI) analy-sis in natural water samples have been studied, and anew method for determination of ultra-trace Cr andCr speciation in water by GFAAS was developed. Theresults indicated that adsorption efficiency was 100%at pH7.5, the enrichment factor was above 50, theadsorbed total Cr was quantitatively desorbed with2ml of 0.20g/L tartaric acid and for Cr(III) with 2ml of 0.20g/L citric acid. The recovery rate was 98～112%, detection limit 0.004μg/L and coefficient ofvariation was 1.8% while detecting ultra-trace Cr (III)and Cr (VI) in Antarctic water samples.

关 键 词：CR 冠醚交联壳聚糖 吸附率 铬 超痕量 富集分离 环境监测 价态分析 

分 类 号：X132[环境科学与工程—环境科学]