Consulta: subjectFacets:"Acid digestion"
Registros recuperados: 2
Data/hora: 12/06/2024 14:09:49

Improvements in Digestion Protocols for Trace Element and Isotope Determinations in Stream and Lake Sediment Reference Materials (JSd-1, JSd-2, JSd-3, JLk-1 and LKSD-1)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Revillon, Sidonie; Hureau Mazaudier, Daniele.
Total dissolution is a critical step in geochemical analysis. Despite the number of published protocols, this issue still draws attention for sediment samples, which are particularly difficult to dissolve due to the common occurrence and high abundance of refractory phases such as zircon. We present tests of different chemical digestion procedures carried out on reference materials (RM) of stream (JSd-1, JSd-2 and JSd-3) and lake (JLk-1 and LKSD-1) sediments from the Geological Survey of Japan (GSJ) and the Canadian Certified Reference Material Programme (CCRPM). We demonstrate that the fusion technique is not appropriate for our studies as not all elements of interest were recovered and blank levels were too high to permit further Sr and Pb isotopic...
Tipo: Text
Palavras-chave: Sediments; Fusion; Dissolution acide; HR ICP MS; Materiel de reference; Sediment; Fusion; Acid digestion; HR ICP MS; RM; Sédiments; Fusion; Dissolution acide; HR ICP MS; Matériel de référence.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6840.pdf

Fast assessment of mineral constituents in grass by inductively coupled plasma optical emission spectrometry
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Santos,Éder José dos; Baika,Loana Mara; Herrmann,Amanda Beatriz; Kulik,Suzete; Sato,Charyane Satie; Santos,Arlene Bispo dos; Curtius,Adilson José.
A method for evaluating inorganic constituents in the grass by ICP OES is proposed. The samples were digested with nitric acid plus hydrogen peroxide in a microwave system. Seventeen samples were collected in the metropolitan area of Curitiba and Castro in the Paraná State, Brazil. The following elements were studied: Al, As, Ba, Ca, Cd, Co, Cr, Cu, Fe, K, Mg, Mn, Mo, Na, Ni, P, Pb, Sb, Se and Zn. The linear coefficients of the curves were higher than 0.999 and the precision, expressed as the relative standard deviation, which was below 10%, being considered adequate. The accuracy was validated by using the recovery test (recoveries from 80 to 107%) and by the analysis of botanical certified materials. For one sample, two other digestion procedures, using...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: ICP OES; Inorganic constituents; Acid digestion; PCA.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000300017