The method has been successfully used for determination of co balt at the ppb level in authentic samples .

• 用2mL 1mol/L的HClO_4溶液淋洗钴亚硝基R盐的络合物直接进行比色测定,可以测定ppb级的痕量钴,并成功地将该方法应用于试样分析。