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.
出处
《分析试验室》
CAS
CSCD
1999年第4期42-45,共4页
Chinese Journal of Analysis Laboratory
关键词
测定
光度法
铂合金
银合金
铕
钕
Platinum alloy
silver
alloy
spectrophotometry
Europium
Neodymium
