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Production of single superphosphate labeled with 34S Scientia Agricola
Rossete,Alexssandra Luiza Rodrigues Molina; Carneiro,Josiane Meire Toloti; Bendassolli,José Albertino; Tavares,Claudineia Raquel Oliveira; Sant'Ana Filho,Carlos Roberto.
Single superphosphate is currently one of the mostly used fertilizers as an alternative source for phosphorus and sulphur. Sulphur presents four stable isotopes (32S, 33S, 34S, and 36S) with natural abundances of 95.00; 0.76; 4.22; and 0.014% in atoms, respectively. Single superphosphate labeled with the 34S isotope was obtained from a chemical reaction in stoichiometric amounts between Ca(H2PO4)2 and Ca34SO4.2H2O. Calcium sulphate (Ca34SO4.2H2O) was enriched with 5.85 ± 0.01 atoms % of 34S. The Ca(H2PO4)2 reagent was obtained from a reaction between CaCl2.2H2O and H3PO4. The reaction between the Ca(H2PO4)2 thus produced and the labeled Ca34SO4.2H2O compound was then performed to obtain the 34S-labeled single surperphosphate. The thermal decomposition of...
Palavras-chave: Isotopic determinations; Sulphur; Stable isotopes; Mass spectrometry; Labeled compounds.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000100013
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