进行了用PAR分光光度法同时测定钴和镍的研究。在pH=5的NaAc-HAc缓冲溶液中,钴和镍可与显色剂4-(2-吡啶偶氮)间苯二酚(PAR)的溶液形成稳定的络合物,络合物的吸收光谱重叠相互干扰,经过实验确定以508.0、568.0nm作为钴(Ⅱ)、镍(Ⅱ)的测量波长,应用双波长线性回归法可同时测定。方法简单、快速、灵敏度高。 The simultaneous determination of cobalt and nickel by PAR spectrophotometry was carried out. In NaAc-HAc buffer solution at pH = 5, cobalt and nickel can form stable complexes with the solution of 4- (2-pyridylazo) resorcinol (PAR), a developer. The absorption of the complexes Spectral overlap and mutual interference, through experiments to determine 508.0,568.0nm as the cobalt (Ⅱ), nickel (Ⅱ) measuring wavelength, the application of dual-wavelength linear regression method can be simultaneously measured. Method is simple, fast, high sensitivity.