本法是根据铝与错合剂Ⅲ(Ⅰ)作用生成络合物的原理。将O.1—0.2克合金样品以水润湿,然后慢慢加入比重1.16的HCl 10毫升,待剧烈的作用停止后,将溶液煮沸数分钟,并稀释至250毫升。加入1克NH_4Cl,1毫升90%的硫醇基乙酸溶液,20毫升10%的醋酸铵溶液及20毫升10%的苯甲酸铵溶液。将所得带有沉淀的溶液加热到80°,加入HCl,使沉淀完全溶解,然后慢慢地加入NH_4OH(1:1),使苯甲酸铝又重新析出。煮沸2分 This law is based on the principle of aluminum and complexing agent Ⅲ (Ⅰ) the role of complex formation. O.1-0.2 g of the alloy sample was wetted with water and then 10 ml of HCl with a specific gravity of 1.16 was slowly added. After stopping the vigorous action, the solution was boiled for a few minutes and diluted to 250 ml. Add 1 g of NH 4 Cl, 1 ml of 90% mercaptoacetic acid solution, 20 ml of 10% ammonium acetate solution and 20 ml of 10% ammonium benzoate solution. The resulting solution with a precipitate was heated to 80 ° C, HCl was added to completely dissolve the precipitate, and NH₄OH (1: 1) was added slowly to re-precipitate the aluminum benzoate. Boil 2 points