流动注射在线稀释法测定制革用水和废水中钙离子  

On-line Diluting Determination of Calcium Ion in Operating Water and Tannery Wastewater by Flow Injection Analysis

作　　者：俞凌云[1,2,3] 董伟[1,2] 金晶[1,2] 吴孟茹 刘苏锐[1,2] 孙艳[1,2] 张新申[3] 

机构地区：[1]四川出入境检验检疫局 [2]柳钢技术中心,四川成都610041 [3]四川大学制革清洁技术国家工程实验室,四川成都610065

出　　处：《中国皮革》2012年第21期4-7,共4页China Leather

基　　金：国家863课题(2007AA092001-5)

摘　　要：建立了流动注射分析皮革废水中钙离子的方法。在 pH 值 2. 5 条件下,CPAⅢ与钙离子反应生成蓝色稳定络合物( 波长 605nm) 。通过在线稀释样品,实现样品的实时在线分析。方法的线性范围为 0. 1 ～ 50mg/L,相对标准偏差为1. 04% ( n = 10) ,样品加标回收率在 97. 0% ～ 98. 2% 之间,具有良好的重现性和准确性。此方法适合制革用水和制革废水中钙离子的检测。The method of FIA determination of calcium ion was established based on the reaction of Chlorophosphonazo III （CPA III） with calcium to form a blue complex in hydrochloric acid solution （pH 2. 5 ） at 605nm. The absorbance value of this compound is directly proportional to the concentration. The method of＇ on - line dilution samples is suitable for determination of dif- ferent concentrations of Caz＋ in tannery wastewater. Optimum conditions for determining Ca2＋ were investigated by univariate meth- od. Under the optimum conditions, a linear calibration graph is obtained over the range 0. 1 ～ 50mg/L, the relative standard devia- tion is 1.04% （n = 10） and the standard addition recovery is between 97.0% and 98.2%. The method has been satisfactorily ap- plied for the determination of Ca2＋ in tannery operating water and effluents.

关 键 词：流动注射 钙离子 在线稀释 制革用水 制革废水 

分 类 号：X832[环境科学与工程—环境工程]