Analysis of soil reference materials for vanadium(+5) species by electrothermal atomic absorption spectrometry.
Solid Certified Reference Materials (CRMs) with known vanadium(+5) content are currently not commercially available. Because of this, vanadium species have been determined in solid CRMs of soil, viz. CRM023-50, CRM024-50, CRM049-50, SQC001 and SQC0012. These CRMs are certified with only total vanadium content. Vanadium(+5) was extracted from soil reference materials with 0.1M Na(2)CO(3). The quantification of V(+5) was carried out by electrothermal atomic absorption spectrometry (ET-AAS). The concentration of V(+5) in the analyzed CRMs was found to be ranging between 3.60 and 86.0 microg g(-1). It was also found that SQC001 contains approximately 88% of vanadium as V(+5) species. Statistical evaluation of the results of the two methods by paired t-test was in good agreement at 95% level of confidence.
Department of Chemistry, Tshwane University of Technology, P.O. Box 56208, Arcadia, 0007, Pretoria, South Africa. MandiwanaKL@tut.ac.za
Khakhathi L
KL
Mandiwana
Nikolay
N
Panichev
D007202:Indicators and Reagents; D012015:Reference Standards; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*; D012995:Solubility; D013054:Spectrophotometry, Atomic; D017968:Vanadium Compounds / Q000032:analysis*
D007202:Indicators and Reagents; D012987:Soil; D012989:Soil Pollutants; D017968:Vanadium Compounds