Determination of leachable vanadium (V) in sediment.
Mampuru, Lekgala A. Panichev, Nikolay A. Ngobeni, Prince Mandiwana, Khakhathi L. Kalumba, Makonga M.
Mampuru, Lekgala A.
Panichev, Nikolay A.
Ngobeni, Prince
Mandiwana, Khakhathi L.
Kalumba, Makonga M.
Citations
Altmetric:
Abstract
A method for speciation of vanadium in solid samples was developed for quantification of vanadium(+5) in solid samples of sediment Certified Reference Materials (CRM) PACS-2 and MESS-3 (Trace Elements in Sediments) of known total vanadium content. The method relies on a classical analytical chemistry procedure based on leaching water-insoluble vanadium(+5) compounds from the solid state into solution using Na2CO3 followed by electrothermal atomic absorption spectrometry (ET-AAS) detection. The total amount content of vanadium was determined after complete digestion of the CRMs and found to be 132 ± 5 and 245 ± 12 µg g–1 in PACS-2 and MESS-3, respectively, in good agreement with the certified values of 133 ± 6 µg g–1 and 243 ± 12 µg g–1. The concentrations of vanadium(+5) were determined to be 25 ± 3 µg g–1 and 13 ± 2 µg g–1 in PACS-2 and MESS-3, respectively. These results were verified by the method of standard additions for which quantitative recoveries (100 ± 2 and 97 ± 3 %, one standard deviation, n = 3) were obtained for spikes added to PACS-2 and MESS-3, respectively. Approximately 18.8 % of the total vanadium content of PACS-2 and 5.3 % in MESS-3 is in the form of vanadium(+5) species.
Description
Date
2015-02-04
Journal Title
Journal ISSN
Volume Title
Publisher
South African Chemical Institute
Collections
Research Projects
Organizational Units
Journal Issue
Keywords
Certified reference materials, Vanadium(+5) speciation, Electrothermal atomic absorption spectrometry