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Organic sulfur oxidation to sulfate in soil samples for total sulfur determination by turbidimetry Rev. Bras. Ciênc. Solo
Rossete,Alexssandra Luiza Rodrigues Molina; Bendassolli,José Albertino; Trivelin,Paulo Cesar Ocheuze.
Sulfur in the soil occurs in two basic forms, organic and inorganic S. The organic form accounts for 95 % of S in most soils. The effectiveness of organic S to oxidate to sulfate was evaluated for total S determination in soil samples by wet (acid) and dry-ash (alkaline) oxidation methods. To evaluate the wet method and the possible use as a reference when evaluating the dry method proposed here, a reference standard from the US National Institute of Standards and Technology (NIST) was used (Montana Soil - NIST 2710). The dry-ash oxidation process with alkaline oxidizing agents is one of the simplest oxidation methods of organic S to the sulfate form and was compared with the wet process. The objective of the study was to develop a dry method that would be...
Tipo: Info:eu-repo/semantics/report Palavras-chave: Sample preparation; Turbidimetric method; Spectrophotometry.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832008000600031
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