Being existence of oxidizing agent,rose-red complex compound in ammoniacal solution,which is the reactive resultant of Ni and butanedionedioxime,can be taken for spectrophotometry determination of Ni.

• 当有氧化剂存在时，在氨性溶液中，镍与丁二酮肟生成酒红色的络合物。借此可作镍的比色测定。