摘要
以丁二酮肟 (DMG)为显色剂与 Co2＋显色反应，生成二元有色络合物，在二元有色络合物基础上再与碘离子形成三元有色络合物，增大有色物质的对单色光吸收能力，提高显色反应的灵敏度.着重系统研究显色反应的影响因素（络合剂用量、温度、酸度、时间）对显色效果的影响，并确定最佳显色参数：λ max=347 nm，ε =1.4× 104 L× mol－ 1× cm－ 1， pH=5～ 7.线性范围 1.0～ 15 ug/mL，三元有色络合物组成为 Co(DMG)2I2.
Dimethylglyoxime, cobalt ion and iodide ion produce a complex Co(DMG)2I2. Many factor which influence color development reaction .eg. color reagent centration, temperature, time and pH have been studied and the optimum color－ reaction condition was obtained. The new determination method of Co2＋ has been set.λ max=347 nm,ε =1.4× 104L× mol－ 1× cm－ 1, pH=5～ 7. Beer's law is obeyed over the range of 1.0－ 15 ug/mL for cobalt. This method has been successfully applied to the determination of minute Co2＋ of waste water.
出处
《安徽机电学院学报》
2001年第3期24-27,共4页
Journal of Anhui Institute of Mechanical and Electrical Engineering
