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分光光度法测定钴,高灵敏的选择性的显色剂是具有亚硝基和羟基的有机试剂。如:亚硝基—R盐、1—亚硝基—2—萘酚、2—亚硝基—1—萘酚。亚硝基—R盐法是国内外测定钴的常用方法,不足的是大量的Cu(Ⅱ)需加掩蔽剂或电解除铜。高含量的钴可以用硫氢酸盐法和铁氰化钾法,可是,Fe(Ⅲ)、Cu(Ⅱ)、Bi(Ⅲ)等有严重干扰,需要萃取分离、加入掩蔽剂。 EDTA法,可用在高含量钴的测定(2％
Spectrophotometric determination of cobalt, highly sensitive and selective developer is a nitroso and hydroxyl organic reagents. Such as: nitroso-R salt, 1-nitroso-2-naphthol, 2-nitroso-1-naphthol. Nitroso-R salt method is the common method for the determination of cobalt at home and abroad, the lack of large amounts of Cu (Ⅱ) plus masking agent or electrolytic copper removal. High content of cobalt can be used hydrogen sulphate and potassium ferricyanide, however, Fe (Ⅲ), Cu (Ⅱ), Bi (Ⅲ) and other serious interference, the need for extraction and separation, adding masking agent. EDTA method can be used in the determination of high levels of cobalt (2%