NDLI: Determination of gallium in coal and coal fly ash by electrothermal atomic absorption spectrometry using slurry sampling and nickel chemical modification

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Determination of gallium in coal and coal fly ash by electrothermal atomic absorption spectrometry using slurry sampling and nickel chemical modification

Content Provider	Royal Society of Chemistry (RSC)
Author	Wen, Wang Xiao-quan, Shan Bei, Wen
Copyright Year	1992
Abstract	A method was developed for the determination of gallium in coal and coal fly ash by electrothermal atomic absorption spectrometry using slurry sampling and nickel chemical modification. In the presence of nickel modifier the integrated absorbance for gallium was improved by a factor of 2.46 and matrix interferences with the absorption signals were eliminated, and hence similar atomization profiles were obtained for gallium in slurries and in aqueous standard solutions. Therefore, calibration using aqueous standards could be applied. The recommended method was applied to the determination of gallium in real samples. The data obtained by slurry sampling were in good agreement with the certified values or with those obtained after pressure attack of the samples. The relative standard deviations for ten replicate determinations were in the range 2.1–5.7% for gallium in coal and coal fly ash for gallium concentrations of 1.05–59.7%µg g–1.
Starting Page	761
Ending Page	764
Page Count	4
File Format	PDF
ISSN	02679477
Volume Number	7
Issue Number	5
Journal	Journal of Analytical Atomic Spectrometry
DOI	10.1039/JA9920700761
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Gallium Fly ash Absorption spectroscopy Nickel Positive-definite matrix
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Analytical Chemistry

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