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.
出处
《电镀与精饰》
CAS
北大核心
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
关键词
显色剂
光度法
电镀废水
镉
chromogenie agent
photometry
electroplating wastewater
cadmium
