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Study on pH Effect in Process of an Entero-gastric Fiber-optic Sensor Design
Department of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
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
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
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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.
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(11):447-454.
Guo-ping, Chen; Rong-min, Xia; Jun, Gong; Wen-de, Shou. 2002. "Study on pH Effect in Process of an Entero-gastric Fiber-optic Sensor Design." Sensors 2, no. 11: 447-454.