Studies on the Non-aqueous Electrochemistry of Bases in Foods : Part I. Non-aqueous Electrochemical Analysis of Caffeine
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- Matsumoto Kiyoshi
- Laboratory of Food Analysis, Faculty of Agriculture, Kyushu University
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- Tateishi Riyoko
- Laboratory of Food Analysis, Faculty of Agriculture, Kyushu University
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- Osajima Yutaka
- Laboratory of Food Analysis, Faculty of Agriculture, Kyushu University
Bibliographic Information
- Other Title
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- 食品中の塩基成分の非水電気化学に関する研究 : Ⅰ.カフェインの非水電気化学分析
- 食品中の塩基成分の非水電気化学に関する研究-1-カフェインの非水電気化学分析
- ショクヒンチュウ ノ エンキ セイブン ノ ヒスイ デンキ カガク ニカンスル
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Abstract
A practical method has been studied for the determination of caffeine in foods. A non-aqueous electrochemical technique was introduced for this purpose. Use of chloroform, acetic anhydride and benzene in 1 : 2 : 4 vol. proportions gave the most precise potentiometric curve with perchloric acid/glacial acetic acid titrant. Use of chloroform, acetic anhydride in 23 : 5 or 3 : 1 vol. proportions gave well defined conductometric curve. The lower limit of caffeine determiantion was about 0. 2 mg. Conductometric titration curves suggested that the conductance of the solution in the presence of a certain excess of titrant would have high correlation with caffeine content.
Journal
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- 九州大學農學部學藝雜誌
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九州大學農學部學藝雜誌 32 (4), 153-159, 1978-03-30
Faculty of Agriculture, Kyushu University
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Details 詳細情報について
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- CRID
- 1390853649767930752
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- NII Article ID
- 110001790532
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- NII Book ID
- AN0005519X
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- ISSN
- 03686264
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- DOI
- 10.15017/23258
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- HANDLE
- 2324/23258
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- NDL BIB ID
- 1932334
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- Text Lang
- ja
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- Data Source
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- JaLC
- IRDB
- NDL
- CiNii Articles