工业废水中铬含量的电化学法检测

目的:研究微机控制—薄层流动计时库仑分析法在电镀工业废水中铬含量测定中的应用。方法:建立微机控制—流动计时库仑分析法,对水中Cr(VI)含量进行测定。结果:线性范围为3～24mg/L,相对标准偏差小于0.1％,回收率为98.0％～103.0％。结论:流动计时库仑分析法克服了电容电流及电极表面性质改变等噪声干扰,具有快速灵敏、准确、再现性好的优点。对水中Cr(VI)的测定,获得了满意结果。

Determination of chromium(Ⅵ) in industrial waste water by electrochemical method

Objective: We Studied on the application of computer-controlled chronocoulometry for flowing solution in the determination of chromium (Ⅵ) in the waste water of plating. Methods: Computer-controlled chronocoulometry for flowing solution was developed and applied to the determination of chromium (Ⅵ). Results: The linear range of chromium (Ⅵ) was 3～24mg/L, and the relative standard deviation was less than 0.1％. The recovery was 98％～103％ in the determination of chromium (Ⅵ) in waste water. Conclusion: Chronocoulometry for flowing solution overcomed noise disturbance resulting from capacity current and variety of property of electrode surface. This method was sensitive, accurate and well reproducible. It had been applied to determination of chromium (Ⅵ) in waste water with satisfactory results.