铜基合金中微量铈及铈组稀土分光光度测定  

Spectrophotometric Determination of Trace Cerium and Ce Group Rare Earths in Copper-Based Alloys

作　　者：金伟[1] 杨润兴 

机构地区：[1]上海钢铁研究所测试中心,上海200940

出　　处：《分析试验室》1992年第4期40-41,共2页Chinese Journal of Analysis Laboratory

摘　　要：本文提出在氯化铵存在下,以铁作载体,用氨水先将铁、铈共沉淀与基体铜分离。在0.29mol/L H_2SO_4介质中,用草酸掩蔽铁,CPA-PN与铈显色,借此可测定铜基合金中0.002%～0.02%铈及铈组稀土。In the presence of ammonium chloride, cerium is coprecipitated after adding Fe(Ⅲ) and ammonia solution and separated from matrix copper. Cerium and cerium group rare earths are spectrophotometrically determined in 0.29mol/L H_2SO_4 with p-nitrochlorophosphonazo as chromogenic agent and oxalic acid as masking agent. The method is used for the determination of cerium and Ce group rare earths with concentrations ranging between 0.002%～0.02% in copper based alloys.

关 键 词：铜基合金 分光光度法 铈 铈组稀土 

分 类 号：TG146.11[一般工业技术—材料科学与工程]