论文部分内容阅读
酸性光亮镀铜溶液中少量的氯离子(20～80毫克·升~(-1))可在非水丙酮介质中,以银作指示电极,双盐桥甘汞电极作参比电极,硝酸银标准溶液直接滴定,终点电位突跃达200毫伏左右,响应速度较快,极适宜于自动电位滴定。大量的铜离子及硫酸根离子,少量的铁、铝、锌、镍离子,以及数种KG系列光亮添加剂均不干扰测定。试验对比了六种指示-参比电极组合,证明在镀铜溶液中以银/甘汞电极组合性能最优。分析准确度好,一个样品可在2～3分钟内完成测定。
A small amount of chloride ion (20-80 mg · L -1) in acid bright copper plating solution can be used in the non-aqueous acetone medium with silver as indicator electrode and double salt bridge calomel electrode as reference electrode. Silver nitrate Standard solution titration, the end potential suddenly jump up to 200 millivolts, fast response, very suitable for automatic potentiometric titration. A large number of copper ions and sulfate ions, a small amount of iron, aluminum, zinc, nickel ions, and several KG series of bright additives do not interfere with the determination. The experimental comparison of the six indicator - reference electrode combinations proved to be optimal in silver / calomel electrode combinations in copper plating solutions. Analytical accuracy, a sample can be completed within 2 to 3 minutes.