摘要
本文评述了电热石墨炉分子吸收光谱法(MAS)及其在分析化学上测定卤素的近期进展,讨论了MAS测定卤素的基本原理。介绍了碱金属、碱土金属、第Ⅲ主族元素和一些重金属元素的双原子分子卤化物的分子吸收光谱MX(X=F,Cl,Br,I)。指出当用MX的吸收光谱测定卤素时,谱带宽度,背景吸收和共存离子干扰影响MAS法的应用。比较了原子吸收光谱法(AAS)和MAS在原理和应用两个方面的区别。介绍了利用双原子分子卤化物吸收光谱测定卤素的一些实际应用的领域:(1)海水和饮用水分析,(2)尿和血浆的分析,(3)在半导体或盐AgBr中测定Cl^-,(4)在环保中果树叶的分析,(5)化学试剂。
The advance of determination of trace halides by using diatomic molecular absorption spectrometry (MAS) have been reviewed. The principles of MAS bave been discussed. Molecular absorption spectra of monohalides MX (X=F, Cl, Br, I and M=metal) of alkali,alkaline earth, some havy metals and the Ⅲ Pt group elements have been described, where the monohalides were produced in the electrothermal graphite furnace. In the spectra some characteristic band structures have been identified for each metal halide. Generally, the spectral bandwith, background absorptions and co-existing cations influenced the determination of monohalides by using MAS. Principle and analytical application of AAS and MAS are also compared. Some applications of MAS to the analysis of trace balides are reviewed from following aspects: (1)the analysis of drinking water and sea water, (2)the analysis of urine and blood serum samples, (3)the determination of Cl in AgBr or in Cl-doped Se semiconductor, (4)the determination of I in Orchard leaves, (5)the analysis of chemical regents or materials.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
1992年第6期81-90,121,共11页
Spectroscopy and Spectral Analysis
关键词
分子吸收光谱
ⅦA族元素
EGF-MAS method
Determination of halides
Application
