Thomas, R P and Ure, Alan M. and Davidson, C.M. and Littlejohn, David and Rauret, G and Rubio, R and López-Sánchez, J F (1994) Three-stage sequential extraction procedure for the determination of metals in river sediments. Analytica Chimica Acta, 286 (3). pp. 423-429. ISSN 0003-2670Full text not available in this repository. Request a copy from the Strathclyde author
A three-stage sequential extraction procedure, following a protocol proposed by a European working group coordinated and supported by the Community Bureau of Reference (BCR), has been applied to two river sediments from an industrial region of East Catalonia, Spain. The extractant solutions were: Step One, acetic acid (0.11 mol l(-1)); Step Two, hydroxylammonium chloride (0.1 mol l(-1), pH 2); Step Three, hydrogen peroxide (8.8 mol l(-1)) oxidation followed by extraction with ammonium acetate (1 mol l(-1), pH 2). The six elements determined in the extracts were Cd, Cr, Cu, Ni, Pb and Zn. Analysis of the extracts was carried out by flame atomic absorption spectrometry (FAAS). There were slight differences in analyte sensitivity between calibrants prepared in the extractant matrices and acidified aqueous calibrants. No significant matrix interferences were found except for Cr in the acetic acid and hydroxylammonium chloride extracts, which required determination by the standard additions method. The other elements (plus all the elements in the ammonium acetate extracts) were determined by direct calibration against calibrant solutions prepared in the same matrices as the samples.
|Keywords:||atomic absorption spectrometry, sequential extraction, river sediments, Chemistry, Biochemistry, Spectroscopy, Environmental Chemistry, Analytical Chemistry|
|Subjects:||Science > Chemistry|
|Department:||Faculty of Science > Pure and Applied Chemistry|
|Depositing user:||Pure Administrator|
|Date Deposited:||31 May 2012 14:42|
|Last modified:||21 Apr 2017 07:46|