测定碱式氯化铝中总铬,文献介绍的方法必须经过处理,操作烦琐。改进后的方法,对样品无需处理,可直接进行分析,测定简便。现介绍如下。1 材料与方法1.1 主要仪器和试剂721型分光光度计。1mol/L氢氧化钠溶液:称取4g氢氧化钠,溶于去离子水中,并稀释至100ml;5%高锰酸钾溶液;称取5g高锰酸钾,溶于去离子水中,稀释至100ml;0.5%二苯碳酰二肼丙酮溶液: Determination of total chromium in basic aluminum chloride, the literature describes the method must be processed, cumbersome operation. The improved method, the sample without treatment, can be directly analyzed, the determination of simple. Now introduced as follows. 1 Materials and Methods 1.1 The main instruments and reagents 721 spectrophotometer. 1mol / L sodium hydroxide solution: Weigh 4g sodium hydroxide, dissolved in deionized water and diluted to 100ml; 5% potassium permanganate solution; Weigh 5g potassium permanganate, dissolved in deionized water, diluted to 100ml; 0.5% diphenylcarbazide acetone solution: