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| Content Provider | Springer Nature Link |
|---|---|
| Author | Yoo, Wook Jae Heo, Ji Yeon Jang, Kyoung Won Seo, Jeong Ki Moon, Jin Soo Park, Jang Yeon Park, Byung Gi Cho, Seunghyun Lee, Bongsoo |
| Copyright Year | 2011 |
| Abstract | In this study, we have fabricated a fiber-optic pH sensor, which is composed of a light source, a pH-sensing probe, plastic optical fibers and a spectrometer, for determining the degree of infection by Helicobacter pylori in the stomach. As pH indicators, phenol red and m-cresol purple are used, and pH liquid solutions are prepared by mixing phenol red or m-cresol purple solutions and various kinds of pH buffer solutions. The light emitted by a light source is guided by plastic optical fibers to the pH liquid solution, and the optical characteristic of a reflected light is changed according to the color variations of the pH indicator in the pH-sensing probe. Therefore, we have measured the intensities and wavelength shifts of the reflected lights, which change according to the color variations of indicators at different pH values, by using a spectrometer for spectral analysis. Also, the relationships between the pH values of liquid solutions and the optical properties of the modulated lights are obtained on the basis of the changes of the colors of indicators. |
| Starting Page | 139 |
| Ending Page | 143 |
| Page Count | 5 |
| File Format | |
| ISSN | 13406000 |
| Journal | Optical Review |
| Volume Number | 18 |
| Issue Number | 1 |
| e-ISSN | 13499432 |
| Language | English |
| Publisher | Optical Society of Japan |
| Publisher Date | 2011-02-11 |
| Publisher Place | Japan |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | fiber-optic sensor m-cresol purple phenol red plastic optical fiber pH sensor Physics |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atomic and Molecular Physics, and Optics |
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