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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
Title Alternative
Measurement of kerogen sulphur concentration by combustion method in air
File
language
jpn
Author
Ichiba, Kenji
Suzuki, Noriyuki
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.
Journal Title
Geological reports of Shimane University
Volume
10
Start Page
75
End Page
80
ISSN
0287816X
Published Date
1991-07-30
NCID
AN00054980
Publisher
島根大学理学部地質学教室
Publisher Aalternative
Department of Geology, Faculty of Science, Shimane University
NII Type
Departmental Bulletin Paper
Format
PDF
Text Version
出版社版
OAI-PMH Set
Shimane University
Remark
1-11 / 1982-1992
島田昱郎教授退官記念論誌集
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