PAN加吐温80直接比色法测定电镀废水中的镉-《电镀与精饰》

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

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00.6 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。

Abstract:: 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 μg/ml,the concentration 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.