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Use of sodium polytungstate in the granulo-densimetric fractionation of soil material

  • Soil Chemistry
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Abstract

A solution of sodium polytungstate (SPT) is used as a heavy liquid in global soil studies. This reagent has found wide use because it is nontoxic, incombustible, well soluble, environmentally safe, and of low viscosity. There is a relatively simple and accessible method for its regeneration. The reagent contains no carbon compounds, which is important for studying organic matter with the use of carbon isotopes. However, some chemical properties of SPT should be taken into consideration to ensure the obtainment of incoherent and sorbed solid-phase forms of organic matter. A modification of granulodensimetric fractionation is described that allows separating the solid-phase fractions of soils without changes in the content and isotope composition of the organic carbon and organic nitrogen in the separated material.

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Authors and Affiliations

  1. Faculty of Soil Science, Moscow State University, Moscow, 119199, Russia

    E. G. Morgun & M. I. Makarov

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  1. E. G. Morgun
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  2. M. I. Makarov
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Correspondence to E. G. Morgun.

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Original Russian Text © E.G. Morgun, M.I. Makarov, 2011, published in Pochvovedenie, 2011, No. 4, pp. 433–438.

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Morgun, E.G., Makarov, M.I. Use of sodium polytungstate in the granulo-densimetric fractionation of soil material. Eurasian Soil Sc. 44, 394–398 (2011). https://doi.org/10.1134/S1064229311040077

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  • DOI: https://doi.org/10.1134/S1064229311040077

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