【摘要】 探讨了铬盐生产的副产品———铝泥在含三价铬较多时铝的测定方法 ,该方法采用含量为 2 0 %的稀硫酸溶样 ,经过加热、冷却 ,在用 2 0 %的氢氧化钠溶液调节pH =14的条件下 ,加过量的过氧化氢把三价铬氧化为四价铬 ,然后再采用络合返滴定法测定其中的铝成分的含量 ,方便、快速、准确更多还原

【Abstract】 A determination method of aluminum(Ⅲ) in aluminium residue-the by-product of chromium production has been developed when much chromium(Ⅲ) existed. In the process, the sample is treated by 20% sulphuric acid, heated and cooled. The pH is adjusted to 14 with 20% sodium hydroxide solution, and chromium(Ⅲ) is oxided to chromium(Ⅵ)by excess H 2O 2. Then aluminum(Ⅲ) is determined by chelated retitration. The method is simple, fast and accurate.更多还原