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Sensors 2002, 2(11), 447-454; doi:10.3390/s21100447

Study on pH Effect in Process of an Entero-gastric Fiber-optic Sensor Design

1,* , 1, 2 and 1
1 Department of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China 2 Department of Digestion, Second Hospital of Xi’an Jiaotong University, Xi’an 710004,China
* Author to whom correspondence should be addressed.
Received: 28 October 2002 / Accepted: 15 November 2002 / Published: 30 November 2002
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The pH effect on design of a fiber optic sensor newly developed for monitoring entero-gastric reflux is investigated. The research has been carried out by utilizing the sensor to measure characteristic absorption of bilirubin standard solution (used as a calibrator) at different pH values from about 1 to 8. The results show explicitly that the estimation error according to the calibration curves with pH <7 is significantly lower than that at alkaline pH values. Compared with the in vitro experimental data, the optimum pH range for entero-gastric reflux analysis is proposed to be between 5-6. The possible reasons for estimation error of the fiber optic sensor are given in detail.
Keywords: Fiber optic sensor; Bilirubin; pH; Entero-gastric reflux Fiber optic sensor; Bilirubin; pH; Entero-gastric reflux
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Guo-ping, C.; Rong-min, X.; Jun, G.; Wen-de, S. Study on pH Effect in Process of an Entero-gastric Fiber-optic Sensor Design. Sensors 2002, 2, 447-454.

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