Title Transcription | クウキ ネンショウホウ ニヨル ケロジェン イオウ ノウド ノ ソクテイ
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Title Alternative (English) | Measurement of kerogen sulphur concentration by combustion method in air
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File | |
language |
jpn
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Author |
Ichiba, Kenji
Suzuki, Noriyuki
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Description | Determination of total sulphur concentration of kerogen by combustion method in air is examined. The combustion of sample was carried out at 950℃ for 10 min under flowing air of 2500 ml/min. Most sulphurs in sample are oxidized to be SO_2 by combustion. The sulphur dioxide is further trapped by H_2O_2 solution (ca. 3.0%) and reacted with H_2O_2 to be H_2SO_4. The determination of [SO^(2-)_4] in H_2O_2 solution by ion chromatograph and pH meter are examined, respectively. The direct determination of [SO^(2-)_4]by ion chromatograph is one of the most useful and precise analytical methods. While, the determination of [SO^(2-)_4] by pH meter ls based on the possible liner relationship between [H^+] and [SO^(2-)_4] in H_2O_2 solution. Kerogen samples often contain significant amount of halogen anions such as Cl^- and F^- because HCl and HF are generally used for the kerogen extraction. Another halogen anion, Br^-, can be significantly present in kerogen sample when we adopt ZnBr_2 solution as heavy liquid to separate neoformed fluorides and silicate minerals from HF/HCl treated samples. Those halogen anions can induce significant H^+ and obstruct the determination of [SO^(2-)_4]. However, results of [SO^(2-)_4] determination by pH meter for sufficiently washed kerogens are consistent well with ones by ion chromatography. If we sufficiently remove those halogen anions from kerogen samples, the indirect measurement of [SO^(2-)_4] by pH meter can be a fast and useful method to determine kerogen sulphur concentration.
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Journal Title |
Geological reports of Shimane University
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Volume | 10
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Start Page | 75
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End Page | 80
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ISSN | 0287816X
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Published Date | 1991-07-30
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NCID | AN00054980
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DOI(SelfDOI) | |
Publisher | 島根大学理学部地質学教室
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Publisher Aalternative | Department of Geology, Faculty of Science, Shimane University
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NII Type |
Departmental Bulletin Paper
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Format |
PDF
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Text Version |
出版社版
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OAI-PMH Set |
Faculty of Science and Engineering
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Remark | 1-11 / 1982-1992
島田昱郎教授退官記念論誌集
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他の一覧 |