偶氮氯膦Ⅲ褪色光度法测定球墨铸铁中铈  

Spectrophotometric determination of cerium in nodular cast iron by decoloration of chlorophosphonazoⅢ

作　　者：邹本义[1] 李晶[1] 王日朝 程慧静 

机构地区：[1]鞍山钢铁学院应化系,辽宁鞍山114002

出　　处：《冶金分析》2002年第5期47-48,共2页Metallurgical Analysis

摘　　要：在H2SO4介质中,偶氮氯膦Ⅲ(CPAⅢ)与铈 发生氧化褪色反应。该反应的表观摩尔吸光系数ε550=2 94×104,Ce 量在0～20μg/25mL范围内与试剂褪色程度呈线性关系。本法用于稀土球墨铸铁中铈量的测定,结果满意。In this paper,the oxidation reaction of cerium *$ with chlorophosphonazoⅢ in the medium of sulfuric acid was studiedIn the λmax at 550nm,the apparent molar absorptivity is 294×104L·mol·cm-1The linearity range is in the concentration of 0-20μg/25mL for Ce4+.The method has been applied to the determination of cerium*$in nodular cast iron with satisfactory results

关 键 词：偶氮氯膦Ⅲ 褪色光度法 测定 球墨铸铁 铈 

分 类 号：TG115.3[金属学及工艺—物理冶金]