| An analytical scheme for determining forms of sulphur in oil shales and associated rocks. | |
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MedLine Citation:
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PMID: 18964237 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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An analytical scheme for determining various forms of sulphur in oil shales and associated rocks is presented. Acid-soluble sulphate, sulphur contained in monosulphide and in disulphide minerals, and organically-bound sulphur are all quantitatively recovered as separate fractions. Finely-ground oil-shale samples are treated in an inert atmosphere with 6M hydrochloric acid to dissolve the acid-soluble sulphate minerals and form H(2)S from the decomposition of monosulphide minerals. The acid-soluble sulphate is precipitated as barium sulphate and the H(2)S is collected and weighed as silver sulphide. Disulphide minerals in the solid residue from the acid treatment are reduced by an acidified Cr(II) solution in an inert atmosphere, releasing the sulphide as H(2)S. The H(2)S is collected as silver sulphide. An Eschka fusion oxidizes and solubilizes all sulphur remaining within the Cr(II)-treated residue. This sulphate represents organically-bound sulphur and is collected as barium sulphate. The analytical procedures have been verified by using (57)Fe Mössbauer spectroscopy. Good agreement between the chemical and Mössbauer data substantiated the sequential removal of the forms of sulphur and also demonstrated the ability of Mössbauer spectroscopy to determine the absolute quantities of iron present in specific minerals. |
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Authors:
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M L Tuttle; M B Goldhaber; D L Williamson |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Talanta Volume: 33 ISSN: 0039-9140 ISO Abbreviation: Talanta Publication Date: 1986 Dec |
Date Detail:
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Created Date: 2008-10-30 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 2984816R Medline TA: Talanta Country: England |
Other Details:
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Languages: eng Pagination: 953-61 Citation Subset: - |
Affiliation:
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U.S. Geological Survey, MS 916, Box 25046, Denver Federal Center, Denver, CO 80225, U.S.A. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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