PAN加吐温80直接比色法测定电镀废水中的镉  

Determination of Trace Cadmium in Electroplating Wastewater by PAN Plus Twain 80 Direct Colorimetric Method

作　　者：孔令海[1] 杨春[2] 刘定富[1] 徐萌飞[1] 沈岳军 施力匀 

机构地区：[1]贵州大学化学与化工学院,贵州贵阳550025 [2]贵州理工学院化工学院,贵州贵阳550003

出　　处：《电镀与精饰》2017年第6期44-46,共3页Plating & Finishing

基　　金：基金项目:黔科合GZ字(2015)3032

摘　　要：采用PAN加吐温80直接比色法,借助吐温80的增色增溶作用,测定废水中的镉。在0~0.6 mg/L范围内,镉质量浓度与吸光度线性相关,相关系数为0.999。方法的相对标准偏差为2.3%(n=5),样品加标回收率为98.75%~100.92%。该法相较于GB 7471-1987双硫腙分光光度法操作更简便、无毒性,适用于电镀废水中镉的测定。Twain80 has the effect on increasing the color and solubility. PAN and Twain 80 were used to determine cadmium in wastewate by direct colorimetry method. In the range of 0 - 0.6 p,g/ml, the concen- tration of Cd^2＋ was linearly related to the absorbance with correlation coefficient of 0. 999. The relative standard deviation of this method was 2.3% （ n = 5 ） and sample recovery rate was 98.75% - 100.92%. This method was simple and non-toxic compare to the GB 7471-1987 dithizone spectrophotometry. This method was suitable to determine of cadmium in the wastewater produced by electroplating.

关 键 词：显色剂 光度法 电镀废水 镉 

分 类 号：TG115.335[金属学及工艺—物理冶金]