【摘要】 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。更多还原

【Abstract】 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(Ⅲ),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.更多还原