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Hindi Journal of Diagnostic Techniques and Biomedical AnalysisISSN: 2469-5653
Takashi Kanehira Author
Subjects of specialization
Affiliation
Anthocyanins; Cotton swab; pH indicator; Saliva; Nasal secretion
Division of Preventive Dentistry, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
Biography
| Takashi Kanehira Division of Preventive Dentistry, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Hokkaido, Japan |
Publications
Research Article Subscription
Application Of Color Changes Of Anthocyanins In Red Wine And Red Currant Extract As A Clinical PH Indicator
Author(s): Wataru Sakamoto, Takashi Kanehira, Hirohisa Hongou, Akemi Matsuda, Masanori Mune and Kozo Asano
This study was performed to develop a novel colorimetric system using anthocyanins as a clinical pH indicator. Anthocyanins prepared from red wine and red currant extract were characterized by HPLC analysis, alcohol content, and pH. The stability of anthocyanins in aqueous solution and the solid phase was compared. Anthocyanin on a cotton swab was hardly affected by storage for 60 days at room temperature, but the anthocyanin strikingly decreased in aqueous solution. Cotton swabs in which anthocyanin was absorbed displayed a variety of color variations in the pH range from 5.5 to 8.0. Interestingly, it was shown that the color changes correlated with the color component of a* (redness), which was quantified using a chromometer. Measurements of pH in nasal se... view more»
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