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Two-Phase Aqueous Extraction of Chromium and its Application to Speciation Analysis of Chromium in Plasma

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Abstract.

 This work proposes a new extraction method for chromium based on the two-phase aqueous system isopropyl alcohol-ammonium sulfate-ammonium thiocyanate (i-PrOH-(NH4)2SO4-NH4SCN), and the related experimental conditions are optimized. The results show that chromium (III) can be quantitatively extracted under the selected conditions: 4 mL of i-PrOH, 200 μL of 2 mol/L sulfuric acid, 1 mL of 4 mol/L NH4SCN and 3 mL of saturated (NH4)2SO4 solution (Vtotal=10 mL). Application of the proposed method to speciation analysis of plasma chromium was also investigated and satisfactory results were obtained.

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Authors and Affiliations

  1. Center for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS) Beijing 100080, China, , , , , , CN

    Zhi-Hua Wang, Ming Song, Quan-Li Ma, Hui-Min Ma & Shu-Chuan Liang

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  1. Zhi-Hua Wang
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  2. Ming Song
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  3. Quan-Li Ma
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  4. Hui-Min Ma
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  5. Shu-Chuan Liang
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Received May 22, 1999. Revision November 8, 1999.

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Wang, ZH., Song, M., Ma, QL. et al. Two-Phase Aqueous Extraction of Chromium and its Application to Speciation Analysis of Chromium in Plasma. Mikrochim Acta 134, 95–99 (2000). https://doi.org/10.1007/s006040070060

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  • DOI: https://doi.org/10.1007/s006040070060

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