NDLI: Determination of some trace elements in sea-water by atomic absorption spectrometry after concentration with modified silicas

Content Provider	Royal Society of Chemistry (RSC)
Author	Köklü, Ünel Ínce, Hürrem Akman, Süleyman
Copyright Year	1992
Abstract	Silica gels modified with 3-aminopropyltriethoxysilane or 3-mercaptopropyltrimethoxysilane groups have been developed for the preconcentration of copper and cadmium prior to their determination by flame atomic absorption spectrometry. The surface areas of the modified silica gels were determined by the Brunauer–Emmett–Teller (BET) method to be 290 m2 g–1 of the amino-modified silica and 410 m2 g–1 of the thiol-modified silica. Batch and column methods were used for the separation and concentration of copper and cadmium. These metals were quantitatively retained on both the modified gels in slightly acidic media. In the batch method, the effects of pH, shaking time and type of buffer on the adsorption of copper and cadmium were investigated. In the batch and column procedures both copper and cadmium adsorbed on the silicas were quantitatively recovered (relative standard deviation of 2–6%) using 2 mol dm–3 hydrochloric acid even in the presence of sodium chloride up to a concentration of 1.0%.
Starting Page	187
Ending Page	189
Page Count	3
File Format	PDF
ISSN	02679477
Volume Number	7
Issue Number	2
Journal	Journal of Analytical Atomic Spectrometry
DOI	10.1039/JA9920700187
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Emmett Copper Cadmium Absorption spectroscopy Silicon dioxide PH Adsorption Coefficient of variation Acid Sodium chloride
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Analytical Chemistry

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