Improved Sample Pre-treatment for Determination of Caffeine in Tea Using a Cartridge Filled with Polyvinylpolypyrroridone (PVPP)

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概要

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• We have improved sample pre-treatment for the effective removal of polyphenols and simple analysis of caffeine in tea using a cartridge filled with polyvinylpolypyrroridone (PVPP). Nearly 100% of catechins were removed from the green tea sample and caffeine was completely recovered in the range of 98.2-101.3% by sample pre-treatment with a PVPP cartridge. Reproducibility of preparing PVPP pre-treatment cartridges was sufficient for quantitative analysis, because RSDs of analytical values for caffeine obtained by using three individual pre-treatment cartridges filled with 10-200 mg PVPP were 0.60-2.8%. The PVPP pre-treatment cartridge also removed polyphenols perfectly and recovered caffeine faultlessly from oolong and black tea samples. Comparison with the conventional method without sample pre-treatment indicated that the present pre-treatment method with a PVPP cartridge was useful for the simple and precise analysis of caffeine in green, oolong and black tea samples.

• 公益社団法人日本薬学会の論文
• 2007-09-01

著者

• YAMAUCHI Yuji

  Faculty of Pharmaceutical Sciences, Osaka University

• Yamauchi Yuji

  Graduate School Of Pharmaceutical Sciences Osaka University

• Yamauchi Yuji

  Faculty Of Pharmaceutical Sciences Doshisha Women's University

• NAKAMURA Akiko

  Faculty of Pharmaceutical Sciences, Doshisha Women's University

• KOHNO Iho

  Faculty of Pharmaceutical Sciences, Doshisha Women's University

• KITAI Miki

  Faculty of Pharmaceutical Sciences, Doshisha Women's University

• HATANAKA Kirara

  Faculty of Pharmaceutical Sciences, Doshisha Women's University

• TANIMOTO Tsuyoshi

  Faculty of Pharmaceutical Sciences, Doshisha Women's University

• Nakamura Akiko

  Faculty Of Pharmaceutical Sciences Doshisha Women's University

• Kohno Iho

  Faculty Of Pharmaceutical Sciences Doshisha Women's University

• Kitai Miki

  Faculty Of Pharmaceutical Sciences Doshisha Women's University

• Hatanaka Kirara

  Faculty Of Pharmaceutical Sciences Doshisha Women's University

• Nakamura A

  Faculty Of Pharmaceutical Sciences Doshisha Women's University

• Tanimoto Tsuyoshi

  Faculty Of Pharmaceutical Sciences Doshisha Women's University

• Nakamura Akiko

  Department Of Physics Kyoto University

• Nakamura Akiko

  Faculty Of Pharmaceutical Sciences And Research Institute Of Hypertension Kinki University

• Yamauchi Yuji

  Faculty Of Engineering Hokkaido University

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