摘要
由于铈（Ⅳ）对罗丹明Ｂ有褪色作用，进行分光光度法测定铈。实验表明，在ｐＨ０．５～１．５Ｈ２ＳＯ４介质中，有色溶液的最大吸收波长为５５４ｎｍ，铈量在４．８×１０－３～２ｍｇ／Ｌ范围内与有色溶液吸光度的减少值成线性关系。方法简单、快速、准确、选择性好。用于测定含稀土样品中的铈，结果令人满意。
The decolouring reaction which results from the oxidation of Rhodamine B by cerium (Ⅳ) in pH 0.5～ 1.5 (H 2SO 4) has been studied. The decrease in colour is directly proportional to amount of cerium. The maximum absorption is at 554 nm. Beer′s law is obeyed from 4.8×10 3 to 2 mg/L for cerium. The method has been used for determination of cerium in sample that contain rare earth with satisfactory results.
出处
《南京化工大学学报》
1998年第A12期56-58,共3页
Journal of Nanjing University of Chemical Technology(Natural Science Edition)
关键词
罗丹明B
褪色作用
分光光度法
铈
测定
rhodamine B decolouring reaction spectrophotometric cerium
