摘要
采用墨炉原子吸收光谱法（ＧＦＡＡＳ）研究盐卤中铯原子化行为和机理，建立了热解石墨管、ＫＮＯ３－ＮＨ４ＮＯ３基体改进剂、１８－冠－６、溴百里香酚蓝、氯仿萃取分离－ＧＦＡＡＳ测定盐卤中铯的方法。用于测定盐卤中痕量铯，特征质量１．４×１０－１０ｇ／０．００４４Ａ；加标回收率８９％～１０５％；相对标准偏差４．１３％。
The atomizatiom behavior of Cs in bittern and the mechanism were studied by graphite furnace atomic absorption spectrometry.Interferences of inorganic acid from the bittern on absorption signal of Cs were examined.It is shown that there are gaseous interferences and molecular absorption interferences and ionization interferences with regard to the interference of chlorides on absorption signal of Cs.The effects of 3 crown ethers,5 big anion reagents and chlorides on extractability Cs have been compared.A extraction separation GFAAS method for determining Cs in bittern has been established by pyrolytic graphite tube,KNO 3 NH 4NO 3 matrix modifier and 18 C 6,bromothymol blue,chloroform extraction separation.The method exhibits high sensitivity and selectivity,it has been used for the determination of trace Cs in bittern.The characteristic mass is 1 4×10 -10 g/0 004 4 A .The adding recovery is 89% 105% and the relative standard deviation is 4 13% ( n=13 ).
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
1999年第4期619-621,共3页
Spectroscopy and Spectral Analysis
