阳离子交换树脂分离-分光光度法测定水中痕量铜  

Spectrophotometric Determination of Trace Copper in Water After Separation with Cation Exchange Resin

作　　者：徐琼[1] 蒋冬杰[1] 

机构地区：[1]东华理工大学化学生物与材料科学学院,抚州344000

出　　处：《理化检验（化学分册）》2010年第12期1410-1412,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：江西省教育厅赣教高字[2010]2号-GJJ10506

摘　　要：采用静态法研究了HD-8阳离子交换树脂对铜的吸附速率、吸附温度和吸附量等性能。试验结果表明:在0.1～0.5mol·L^(-1)盐酸溶液介质中铜的吸附率在95%以上,用3mol·L^(-1)盐酸溶液3mL可将吸附于柱上的铜(Ⅱ)完全洗脱下来。在优化的试验条件下,该HD-8阳离子交换树脂微柱对铜的富集限为2μg/200mL,富集倍数为67倍。在此基础上提出了一种阳离子交换树脂分离分光光度法测定水样中痕量铜的方法。该方法用于测定鄱阳湖水中痕量铜,测得平均回收率为101.5%之间,相对标准偏差(n=5)为1.82%。Properties（i.e.adsorption rate,adsorption temperature and adsorption capacity） of Cu^（2＋） ion on HD-8 cation exchange resin were studied by static method.It was found that in 0.1—0.5 mol·L^（-1） hydrochloric acid solution,the adsorption rate of Cu^（2＋） was more than 95%,and Cu^（2＋） was completely eluted from resin with 3 mL of 3 mol·L^（-1） hydrochloric acid as eluent.Under the optimized experimental conditions,enrichment limit of 2μg/200 mL and enrichment factor of 67 were obtained by using HD-8 cation exchange resin micro-column.Based on these facts,a method of separation of Cu^（2＋） ion by the cation exchange resin and its determination by spectrohpotometry in water was proposed.Water samples from Poyang lake was analyzed by the proposed method, giving values of average recovery of 101.5%,and value of RSD（n=5） 1.82%.

关 键 词：HD-8阳离子交换树脂 分离 铜 水 

分 类 号：O657.3[理学—分析化学]