用电热原子吸收光谱法分析土壤参比物质中的五价钒。
Analysis of soil reference materials for vanadium(+5) species by electrothermal atomic absorption spectrometry.
机构信息
Department of Chemistry, Tshwane University of Technology, P.O. Box 56208, Arcadia, 0007, Pretoria, South Africa.
出版信息
J Hazard Mater. 2010 Jun 15;178(1-3):1106-8. doi: 10.1016/j.jhazmat.2010.01.082. Epub 2010 Jan 22.
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.
目前市场上没有已知五价钒含量的固态认证参考物质（CRM）。因此，土壤固态 CRM（CRM023-50、CRM024-50、CRM049-50、SQC001 和 SQC0012）中五价钒的形态已经确定。这些 CRM 仅对总钒含量进行了认证。采用 0.1M Na2CO3从土壤标准物质中提取五价钒。采用电热原子吸收光谱法（ET-AAS）对 V（+5）进行定量。分析得出，所分析 CRM 中的 V（+5）浓度在 3.60 至 86.0μg/g 之间。还发现 SQC001 中约有 88%的钒以 V（+5）形态存在。通过配对 t 检验对两种方法的结果进行统计学评估，在 95%置信水平下结果一致。
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