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This article in SSSAJ

  1. Vol. 34 No. 1, p. 62-65
    Received: July 25, 1969
    Accepted: Sept 15, 1969

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An Alkaline Oxidation Method for Determination of Total Sulfur in Soils1

  1. M. A. Tabatabai and
  2. J. M. Bremner2



A rapid and precise method of determining total sulfur in soils is described. The soil sample is heated with alkaline sodium hypobromite solution to oxidize soil sulfur compounds to sulfate, and the sulfate thus formed is reduced to hydrogen sulfide by a modified Johnson-Nishita procedure and determined colorimetrically as methylene blue. The method gives quantitative results with pure organic and inorganic sulfur compounds, including amino acids, sulfonic acids, organic sulfates, sulfoxides, thioureas, sulfates, sulfites, sulfides, and elemental sulfur. It gives quantitative recovery of organic and inorganic sulfur added to soils and soil extracts, and its results with soils agree closely with those obtained by other methods proposed for total sulfur analysis of soils.

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