皮革废渣渗漏液中铬的测定

A study on determination of chrome in tannery waste leakage solution

对皮革废渣(蓝皮屑)渗漏液中铬的二笨碳酰二肼分光光度测定法进行了研究,结果表明此方法的线性范围0～0.400mg/L,吸光度A对浓度c(mg/L)关系回归方程为:A=0.779c-0.0005,线性相关系数为0.9993,检出限为0.007mg/L,相对标准偏差小于3％,加标回收率为100％～105％,用此法对废渣渗漏液中铬的测定表明铬的形态为三价铬,因此,测定总铬时需先加H2SO4-HNO3进行消解,再以KMnO4氧化,二苯碳酰二肼显色,分光光度法测定.

Spectrophotometric determination of chrome in tannery waste leakage solution is studied in this paper. The results indicate that linear range is 0~0.400mg/L, linear correlation coefficient is 0.9993, regression equation is: A=0.779c-0.0005, limit of detection is 0.007mg/L, relative standard deviation is smaller than 3%, rate of recovery is 100%~105%. The form of chrome is trivalence in seepage solution.