Determination of Silicon in Biological Tissue by Electrothermal Atomic Absorption Spectrometry Using Sampling of Original and Pre-ashed Samples

Autor:	V. Krivan, M. Hornung
Rok vydání:	1997
Předmět:	inorganic chemicals Detection limit Silicon Analytical chemistry chemistry.chemical_element Analytical Chemistry law.invention Matrix (chemical analysis) Magnesium nitrate chemistry.chemical_compound chemistry Ashing law Slurry Sample preparation Atomic absorption spectroscopy Spectroscopy
Zdroj:	Journal of Analytical Atomic Spectrometry. 12:1123-1130
ISSN:	1364-5544 0267-9477
DOI:	10.1039/a701313b
Popis:	Two methods for the determination of silicon in biological tissue by electrothermal atomic absorption spectrometry using the slurry sampling technique are described. In one of them, a slurry of the tissue and, in the second, a slurry of the ash obtained by separate thermal pre-treatment in an ashing furnace was introduced into the graphite furnace. The second method proved to be superior regarding the elimination of matrix interferences. Optimum sensitivity was obtained by using a mixture of palladium nitrate and magnesium nitrate as modifier. The silicon contents determined were between about 3 and 14 µg g–1 and they were compared with results obtained by other methods and laboratories. The limits of detection of the direct method and the method involving pre-ashing were found to be 0.2 and 0.03 µg g–1, respectively.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1a33823c2f8be792bda01f1e1c0f68f5 https://doi.org/10.1039/a701313b Zobrazit plný text záznamu