Palladium-kyselina citronová-fluorid amonný jako chemický modifikátor pro odstranění interference matrice při stanovení Sn v lučavkových výluzích vzorků životního prostředí metodou D2-ETAAS

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F09%3A00007800" target="_blank" >RIV/00216275:25310/09:00007800 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Palladium-Citric Acid-Ammonium Fluoride as a Matrix Modifier for Overcoming of Interferences Occurring During the Direct Determination of Sn in Aqua Regia Extracts From Environmental Samples by D2-ETAAS

Popis výsledku v původním jazyce

When tin is to be determined in such a complex matrix like aqua regia extracts of environmental samples by electrothermal atomic absorption spectrometry (ETAAS), spectral interferences occur when deuterium lamp (D2) background correction is used, even using high pyrolysis temperature of 1400 °C achieved with palladium with citric acid chemical modifier. We have found that the further addition of NH4F to palladium with citric acid chemical modifier is essential for overcoming the above-mentioned problemsfor which aluminium oxide is most probably responsible. It is supposed, that NH4F enables volatilization of the alumina matrix formed by hydrolysis from the chloride salt and interfering in a gas phase via the formation of AlF3 which could be, in contrast to aluminium oxide, removed from the graphite furnace during the pyrolysis stage. Using the proposed chemical modifier, the direct and accurate determination of Sn in aqua regia extracts from rocks, soils and sediments is possible even

Název v anglickém jazyce

Palladium-Citric Acid-Ammonium Fluoride as a Matrix Modifier for Overcoming of Interferences Occurring During the Direct Determination of Sn in Aqua Regia Extracts From Environmental Samples by D2-ETAAS

Popis výsledku anglicky

When tin is to be determined in such a complex matrix like aqua regia extracts of environmental samples by electrothermal atomic absorption spectrometry (ETAAS), spectral interferences occur when deuterium lamp (D2) background correction is used, even using high pyrolysis temperature of 1400 °C achieved with palladium with citric acid chemical modifier. We have found that the further addition of NH4F to palladium with citric acid chemical modifier is essential for overcoming the above-mentioned problemsfor which aluminium oxide is most probably responsible. It is supposed, that NH4F enables volatilization of the alumina matrix formed by hydrolysis from the chloride salt and interfering in a gas phase via the formation of AlF3 which could be, in contrast to aluminium oxide, removed from the graphite furnace during the pyrolysis stage. Using the proposed chemical modifier, the direct and accurate determination of Sn in aqua regia extracts from rocks, soils and sediments is possible even

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CB - Analytická chemie, separace

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2009

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Talanta

ISSN

0039-9140

e-ISSN

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Svazek periodika

77

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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