Determination of Leachable Vanadium (V) in Sediment
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 fromthe 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.
KEYWORDS Certified reference materials, vanadium(+5) speciation, electrothermal atomic absorption spectrometry.
Copyright for articles published in this journal is retained by the journal.
SAJChem applies the Creative Commons Attribution (CC BY) license to manuscripts we publish. This license was developed to facilitate open access – namely, free immediate access to, and unrestricted reuse of, original works of all types. Under this license, authors agree to make articles legally available for reuse, without permission or fees, for virtually any purpose. Anyone may copy, distribute or reuse these articles, as long as the author and original source are properly cited.