镉镍电池正极物质中钴的测定

DETERMINATION OF COBALT IN ANODIC MATERIALS OF Ni Cd BATTERIES

在酸性介质中,Co^(2+)与H_2O形成络合离子[Co(H_2O)_6]^(2+),呈粉红色,在515nm处有最大吸收。采用光度法测定镉镍电池正极物质中添加剂钴,钴含量在0～20mg/100mL范围内符合比尔定律。此法干扰元素少,易操作。

Cobalt forms a red complex-ion with H2O in acidic solution.Its maximum absorbance is at 515 nm.The addition agent of cobalt in anodic materials of Ni-Cd batteries is determined with spectrophotometry with cobalt concentration ranging in 0 ~ 20 mg/100 mL,Beer's Law is obeyed and this method is proved as an accurate,easy and quick method.