摘要
制定了快速测定铜-镍合金镀液中铜和镍的分光光度法。在强碱性条件下三异丙醇胺与铜离子生成稳定的蓝色配合物,与镍离子生成稳定的橙黄色配合物。用光度法在波长430nm处测定镍,铜配离子对测定无影响,可以直接得到镀液中镍的质量浓度。在波长680nm处测定铜和镍的总吸光度,利用已测得的镍的质量浓度用差减法计算铜的质量浓度。镀液中的铁杂质与三异丙醇胺生成无色配离子,不干扰铜和镍的测定,镀液中的配位剂焦磷酸钾及其它组分对测定无影响。实验表明,本法测定铜和镍的相对平均偏差分别为0.85%和1.0%,回收率分别为100.7%和98.3%。本法简练,快速而准确,优于其他方法。
Abstract： Spectrophotometry for rapid determination of copper and nickel in a Cu-Ni alloy plating bath was established. Triisopropanolamine reacts with copper to form stable blue coordination compound and reacts with nickel to form stable orange-yellow coordination compound under the strong alkaline condi- tion. When spectrophotometry is used to determine nickel at wavelength 430 nm, the copper complex ions nearly have no influence on the determination, therefore the nickel mass concentration can be immediately obtained. The total absorbance of copper and nickel is measured at wavelength 680 nm, and then, accord- ing to the measured nickel mass concentration, copper mass concentration can be obtained by subtration. Iron impurity in the plating bath will react with triisopropanolamine to form colourless complex ions, but these complex ions do not disturb the determination of copper and nickel, and potassium pyrophosphate complex agent and other constituents in the plating bath all have no impact on the determination. The tests showed that the relative average deviations of copper and nickel using this method were 0.85% and 1.0%, respectively, and the rate of recovery were 100.7% and 98.3 %, respectively. The method is sim- ple, rapid, and superior to other methods.
出处
《电镀与精饰》
CAS
北大核心
2014年第2期36-39,共4页
Plating & Finishing
关键词
铜-镍合金镀液
铜质量浓度
镍质量浓度
三异丙醇胺
显色剂
分光光度法
Cu-Ni alloy plating solution
copper mass concentration
nickel concentration
Triisopro-panolamine
color developing agent
spectrophotometry
