火焰发射光谱法测定卤水中铷和铯  

A Flame Emission Spectrometry Method for Determination of Ru bidium and Cesium in Bittern

作　　者：何文鉴 赵海英 王慧 郑民奇[2] 

机构地区：[1]青海柴达木综合地质勘查大队实验室,青海格尔木816000 [2]西安地质矿产研究所,陕西西安710054

出　　处：《岩矿测试》2005年第2期148-150,共3页Rock and Mineral Analysis

摘　　要：选择LaCl3作电离缓冲剂,用火焰发射光谱法测定卤水中的Rb和Cs,有效地降低了基体干扰,提高了方法的灵敏度.方法的测定下限为:18 μg/L Rb,1.8 μg/L Cs;加标回收率在92.4%～105.0%.方法用于实际样品分析,结果与KCl电离缓冲剂原子吸收光谱法相吻合,且减少了预先测定K+的操作.对卤水样品中Rb和Cs 11次平行测定,计算方法的RSD分别为5.78%和8.11%.A method for determination of rubidium and cesium in b it tern by flame emission spectrometry was developed using LaCl 3 as the ionizati on buffer which effectively reduced the matrix interference and increase the sen sitivity. The detection limits are 18 μg/L for Rb and 1.8 μg/L for Cs. The rec overy with standard addition are 92.4%~105.0%.Applied to the real sample analysi s,the results obtained by this method were in conformity with those by using KCl ionization buffer-atomic absorption spectrometry method,without pre-analysis of K+.The precision were 5.78% for Rb and 8.11% for Cs RSD(n=11).

关 键 词：火焰发射光谱法 卤水 原子吸收光谱法 LACL3 加标回收率 基体干扰 测定下限 样品分析 计算方法 缓冲剂 铯 铷 灵敏度 KCl K^+ 水样品 RSD 电离 Rb 

分 类 号：O657.31[理学—分析化学] TS392[理学—化学]