冠醚交联壳聚糖在砷形态分析中的应用  

Application of crown ether crosslinked chitosan for arsenic speciation analysis

作　　者：张淑琴[1] 汪玉庭[2] 唐玉蓉[2] 

机构地区：[1]武汉科技大学资源与环境工程学院,湖北武汉430081 [2]武汉大学资源与环境工程学院,湖北武汉430072

出　　处：《武汉科技大学学报》2007年第6期636-639,共4页Journal of Wuhan University of Science and Technology

基　　金：教育部博士点基金资助项目(2000048615)

摘　　要：研究二苯并18-冠-6冠醚交联壳聚糖对砷的吸附行为，建立了石墨炉原子吸收法测定环境水中痕量砷的形态分析方法，探讨了最佳分析条件。该法用于分析实际环境水样富集倍数达50倍以上，用2mL0．40g·L^-1酒石酸洗脱可直接测定有机砷含量，用2mL 4mol·L^-1HCl洗脱可直接测定无机砷含量。该法用于环境水中超痕量砷的形态分析测定，回收率达94％～105％，检出限（3d）为0．20μg·L^-1，相对标准偏差为2．6％～3．2％。The adsorption of dibromodibenzo-18-crown-6 crosslinked chitosan （DCTS） for arsenic is studied, and graphite furnace atomic adsorption method is proposed for determining the speciation and concentration of organic/inorganic arsenic in various natural water samples. When the enrichment factor is above 50, the content of organic arsenic absorbed by DCTS can be determined directly after being eluted off with 0.40 g · L^-1 tartaric acid of 2 mL and that of inorganic arsenic with 4 mol· L^-1 HCl of 2 mL. When using the method for the detection of ultra-trace arsenic in natural water samples, the recovery is 94%-105%; the detection limit,0.20μg · L^-1 ;and the relative standard deviation,2. 6%-3.2%.

关 键 词：冠醚交联壳聚糖 砷 吸附 形态分析 

分 类 号：O636.1[理学—高分子化学]