【摘要】 以乙二醇为增溶剂,硝酸银作沉淀剂,采用氯化银比浊法,在不分离硫酸铜的条件下,直接测定酸性镀铜液中微量氯离子。测定波长为440 nm,线形范围为0~50μg/25 mL,其表观摩尔吸光系数ε=1.3×105,方法检出限为0.035μg/mL,该法用于测定酸性镀铜液中微量氯离子在不同水平的加标回收率为95.4%~104.5%。结果表明,该法准确,快速,简便,其它的常见离子无干扰。更多还原

【Abstract】 Microamounts of chloride ion in acidic copper electroplating solution was determined directly by the silver chloride turbidimetric method in the presence of the major component Cu2+ ion with glycol as solubilizing agent and silver nitrate as precipitating agent.The determination wave length is 440 nm,the linear range is 0～50 μg/25 mL,the apparent molar absorptivity is ε=1.3×105,and the limit of detection is 0.035 μg/mL.The recovery of chloride ion in different levels was measured in acidic copper electroplating solution,the result is 95.4%～104.5%.Moreover,no interference was found in the presence of other familiar coexisting ion.The method is rapid,accurate and simple.更多还原