溶剂萃取石墨炉原子吸收光谱测定盐卤中痕量锂的研究  

STUDY ON THE DETERMINATION OF TRACE LITHIUM IN BITTERN BY SOLVENT EXTRACTION AND GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY

作　　者：向立人[1] 张波[2] 

机构地区：[1]四川大学化学系 [2]川北医学院

出　　处：《四川大学学报（自然科学版）》1997年第5期663-667,共5页Journal of Sichuan University(Natural Science Edition)

摘　　要：采用石墨炉原子吸收光谱，研究在盐卤中锂的原子化行为和机理．建立了热解石墨管、Ａｌ（ＮＯ３）３基体改进剂、苏丹Ⅰ－三辛基甲基氯化铵－邻二氯苯萃取分离石墨炉原子吸收测定盐卤中锂的方法．用于测定盐卤中痕量锂，特征质量为１６×１０－１２ｇ／０．００４４Ａ，加标回收率９５％～１０４％，相对标准偏差（ｎ＝１３）５．４％．The atomization behavior of lithium in bittern and the mechanism were studied by graphite furnace atomic absorption spectrometry.A extraction separation GFAAS method for determining lithium in bittern has been established by pyrolytic graphite tube,Al(NO 3) 3 matrix modifier and Sodan I Tricapry methylammonium Chlorid O Dichlorobenzene extraction separation.The method exhibits high sensitivity and selectivity,it has been used for determination of trace Li in bittern.The characteristic mass is 16×10 -12 g/0.0044A.The added recovery is 95%～104% and the relative standard deviation ( n= 13) is 5.4%

关 键 词：溶剂萃取 石墨炉 原子吸收光谱法 锂 盐卤 测定 

分 类 号：TS392[轻工技术与工程]