光度法测定铂合金及银合金中的铕和钕  

Spectrophotometric Determination of Europium and Neodymium in Platinum and Silver Alloy

作　　者：金娅秋[1] 吴瑞林[1] 

机构地区：[1]昆明贵金属研究所

出　　处：《分析试验室》1999年第4期42-45,共4页Chinese Journal of Analysis Laboratory

摘　　要：研究了新显色剂二溴羧基偶氮氯膦与稀土元素铕及钕的显色反应体系，生成蓝色络合物的λｍａｘ为６５０ｎｍ，灵敏度高，摩尔吸光系数分别为１．０６×１０５及１．０４×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，铕与钕含量在０～４０μｇ／２５ｍＬ浓度范围内符合比尔定律。方法选择性好，在磷酸介质中测定有较宽的适用性，适用于铂合金（王水溶样）和银合金（硝酸溶样）的样品分析。he colour reaction system of Europium or Neodymium with a new chromogenic reagent dibromoocarboxychlorophoshonazo was studied.Europium or neodymium reacts with the reagent to form a blue complex which has an absorption maximum at 650nmwith the apparent molar abosrptivities 1.06105 or 1.04105Lmol-1cm-1 respectively.Beer's law is obeyed in the range of 040g/25mL for Europium or Neodymium.The coloration sensitive and selective.In phosphoric acid is medium,the method has been applied to the determination of Europium,Neodymium in platinum and silver alloy.

关 键 词：测定 光度法 铂合金 银合金 铕 钕 

分 类 号：TG146.32[一般工业技术—材料科学与工程] TG146.33[金属学及工艺—金属材料]