硫堇褪色光度法测定镍-钴合金镀液中的钴  

Spectrophotometric Determination of Co^(2+) in Nickel-Cobalt Alloy Electroplating Bath with Fading Reaction of Thionine

作　　者：郭振良[1] 唐清华[1] 牟起娜 孙言志[1] 

机构地区：[1]烟台师范学院化学与材料科学学院,山东烟台264025 [2]烟台汽车工业学校,山东烟台265500

出　　处：《烟台师范学院学报（自然科学版）》2005年第4期284-286,共3页Yantai Teachers University journal(Natural Science Edition)

基　　金：烟台师范学院中青年基金资助项目(项目编号042911)

摘　　要：在沸水浴及HCl介质中,Co2+能强烈催化铋酸钠氧化硫堇褪色反应,据此建立了褪色光度法测定Co2+的新方法.Co2+在0—50μg/mL内遵守比尔定律,表观摩尔吸光系数为3.494×104L/(mol.cm)-1,检出限为0.05205μg/mL.该褪色反应用于镍-钴合金镀液中钴含量的测定,结果令人满意.It is investigated that Co^2＋ can catalyze the fading oxidation of thionine by NaBiO3 in HC1 medium at 100℃. The maximum absorption wavelength is 600 nm and the apparent molar absorptivity is 3. 494 × 10^4L/（mol.cm） - 1. The linear range is 0-50μg/mL of Co2＋. The detection limit for Co^2＋ is 0. 05205μg/ mL. The method has been applied to the determination of Co^2＋ in nickel-cobalt alloy electroplating bath with satisfactory results.

关 键 词：钴 硫堇 褪色光度法 

分 类 号：TG115.335[金属学及工艺—物理冶金] TQ153.14[金属学及工艺—金属学]