催化剂中还原镍的测定,属于物相分析,最好的方法是X-射线衍射分析,或热重分析(TGA),但需一套仪器设备。我们用化学方法分离出还原镍,然后用EDTA络合滴定法测定之。目前分离方法有:溴甲醇溶解法(动态室温反应,溴甲醇磁力搅拌法;静态加温反应,溴甲醇甘油浴法);羰基镍法;氨浸法和氯化汞(Ⅱ)法等。实验证明,溴甲醇磁力搅拌法分离还原镍较合适. Determination of nickel reduction in the catalyst, belonging to the phase analysis, the best method is X-ray diffraction analysis, or thermal gravimetric analysis (TGA), but need a set of equipment. We chemically reduced nickel and measured it by EDTA complexometric titration. Currently, the separation methods are as follows: methyl bromide dissolution method (dynamic room temperature reaction, methyl bromide magnetic stirring method; static warming reaction, bromine methanol glycerol bath method); nickel carbonyl method; ammonia leaching method and mercuric chloride (II) method. Experiments show that bromine methanol magnetic separation method is more appropriate separation of nickel.