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.
出处
《中国皮革》
CAS
北大核心
2012年第21期4-7,共4页
China Leather
基金
国家863课题(2007AA092001-5)
关键词
流动注射
钙离子
在线稀释
制革用水
制革废水
flow injection analysis
calcium ion
on- line dilution
operating water
tannery wastewater
作者简介
俞凌云，女，1982年生，博士，工程师
通讯联系人
