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

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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Abstract

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 3.0).

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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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