VAPORIZATION MECHANISMS FOR GOLD AND FOR GOLD IN THE PRESENCE OF VANADIUM IN A GRAPHITE ATOMIZER

被引：11
作者：
ALLER, AJ
机构：
[1] Department of Biochemistry and Molecular Biology, University of León
来源：
ANALYTICA CHIMICA ACTA | 1994年 / 292卷 / 03期
关键词：
ATOMIC ABSORPTION SPECTROMETRY; ATOMIZATION KINETICS; GOLD ATOMIZATION; MODIFIERS; VANADYL CHLORIDE;
D O I：
10.1016/0003-2670(94)00070-0
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Time resolved absorbance profiles, the influence of gold concentration and the effect of vanadyl chloride have been established for graphite furnace atomic absorption signals of gold. Conventional furnace operating procedures with both wall and platform atomization modes showed similar results for the orders of reaction, but a few differences were noted in the activation energy values. On account of both the relatively narrow half widths and uniform peak profiles, gold-graphite interactions appear to be very strong for low gold concentrations, where the order of gold release is near to unity. However, gold-graphite interactions decrease for higher concentrations of gold, where the order of gold release deviates from unity. Absorbance profiles were found to be sensitive to the mass of the vanadium present showing larger integrated absorbances when the vanadium mass increases.
引用
收藏
页码：317 / 324
页数：8
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