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Krommenhoek, E.E., Leeuwen, M.V., Gardeniers, H., Gulik, W.M.V., Berg, A.V.D., Li, X.N., Ottens, M., et al. (2008) Lab-Scale Fermentation Tests of Microchip with Integrated Electrochemical Sensors for pH, Temperature, Dissolved Oxygen and Viable Biomass Concentration. Biotechnology and Bioengineering, 99, 884-892.
https://doi.org/10.1002/bit.21661

has been cited by the following article:

• TITLE: An Optical Fiber Sensor for Simultaneous Measurement of pO2 and pH

  AUTHORS: Baorong Fu, Xianwen Zhang, Huimin Cao, Zhushanying Zhang

  KEYWORDS: Optical Fiber Sensor, Oxygen, pH, Fluorescence

  JOURNAL NAME: Open Journal of Applied Sciences, Vol.13 No.4, April 28, 2023

  ABSTRACT: Whether in the monitoring of critically ill patients such as shock, respiratory failure, brain injury, or in major anesthesia surgeries, it is necessary to evaluate the patient’s pO2 and pH. An optical fiber sensor presented is capable of monitoring the presence of oxygen partial pressure (pO2) and pH in the real-time. The sensor is based on fluorescence sensing of polymer immobilized in the oxygen/pH-sensitive membranes and covalently attached to the optical fiber probe. The design of this sensor uses LED as light source, which is an excitation light source, inducing specific wavelengths of fluorescence on the oxygen/pH-sensitive membrane. The intensity and lifetime of fluorescence are related to the pO2 and pH. So the pO2 and pH can be measured by the relationship between the pO2/pH values and the intensity and lifetime of fluorescence. The signal conditioning system based on DSP and STM32 was used to store and process data, and display test values. The response of the sensor for pO2 and pH monitoring with nitrogen (N2) as a balancing gas in the laboratory was performed. Finally, the oxygen/pH sensing scheme presented in this work is intended for using in biological, medical and environmental applications.