分光光度法快速测定工业废水中的镍含量

Rapid Spectrophotometric Determination of Nickel in Industrial Waste Water

通过试验确定了一种工业废水中镍含量的快速测定方法。先用过硫酸铵将废水中镍(Ⅱ)氧化为镍(Ⅳ)、铁(Ⅱ)氧化为铁(Ⅲ),再用柠檬酸铵掩蔽铁(Ⅲ)、铜(Ⅱ)离子,在pH=10条件下直接用丁二铜肟分光光度法测定工业废水中的镍含量。考察入射光波长、显色剂用量、溶液酸度等因素对吸光度的影响;在废水中加入镍标准溶液进行测定,结果表明加标回收率在98.3%-104.5%之间。此法不需沉淀与灼烧或萃取分离步骤,具有简便、快速、准确的特点。

The paper had a method of the rapid determination of nickel in industrial waste water. Firstly the nickel （ II ） in wastewater was oxide to the nickel （IV） by the ammonium sulfate , Fe （ II ） is oxidized to Fe （ III ）, then iron ammonium citrate （ In ）, Cu （ II ） ions were masked in the pH = 10 under the condition of the direct use of succinic Spectrophotometric determination of copper-oxime in the nickel in industrial waste water. Incident light wavelength, color reagent, acidity and other factors on the impact of absorbance were examined; nickel in wastewater by adding standard solution were measured, results show that the recovery is 98.3 % to 104.5%. This method without precipitation and burning or extraction steps is simple, rapid and accurate in characteristics.