Optimization of a Wet Digestion Method for the Determination of Mercury in Coal Samples by Cold Vapor Atomic Absorption Spectrometry (CVAAS)

Autor:	R. Dama, P. Verbiest, R. Dumarey
Rok vydání:	2010
Předmět:	Detection limit Reproducibility Chromatography business.industry Analytical chemistry chemistry.chemical_element General Chemistry Mass spectrometry Mercury (element) chemistry Wet digestion Coal Cold vapour atomic fluorescence spectroscopy business
Zdroj:	Bulletin des Sociétés Chimiques Belges. 94:351-357
ISSN:	0037-9646
DOI:	10.1002/bscb.19850940507
Popis:	A comparative study is reported on different wet-digestion mixtures and reaction vessels for the reduction-aeration/amalgamation/CVAAS determination of mercury in coal samples. A 100% recovery is obtained when performing the digestion in HNO3/HCIO4/(NH4)2S2O8 at 250–300°C using the Bethge apparatus. Total reaction time is about 30 min. No interference is found by undissolved silicates which are eliminated by filtration. The digests are stable for 24 h. The detection limit is 0.2 ng Hg ml−1 for a 5ml-fraction analysis, corresponding to 0.08 ppm in the coal. The reproducibility of the entire method is better than 2% above 0.5 ng ml−1. Results are given for the analysis of standard reference coal samples showing a good agreement with the certified value
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e704f1b58096053514293196a5ca7307 https://doi.org/10.1002/bscb.19850940507 Zobrazit plný text záznamu