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    • 61. 发明专利
    • SOLID STATE SENSOR FOR ANHYDRIDES
    • CA1045205A
    • 1978-12-26
    • CA305134
    • 1978-06-09
    • HYDRO QUEBEC
    • CHAMBERLAND ANDRE MGAUTHIER MICHEL
    • G01N27/407G01N27/62
    • This invention relates to a method of and a system for detecting the activity of gaseous anhydrides in an oxygen-bearing gas. A solid state electrolyte element has oxy-anions of the element forming the anhydride to be detected. A reference electrode is in contact with the electrolyte element and a detection electrode is remote from the reference electrode but also in contact with the electrolyte element, the electrolyte and detection electrode being arranged such that they are free to come into contact with the anhydrous gas, whereas the reference and detection electrodes are arranged such that a difference of potential occurs therebetween when a sample of the anhydride to be detected is contacted with the detection electrode and with the electrolyte element. The electrolyte element is heated to a temperature such that a logarithmic variation in the concentration of the anhydride to be detected causes a proportional and substantially linear variation in the difference of potential, the temperature being below the fusion temperature of the electrolyte element. Finally, oxygen content variations in the gas being measured are compensated. A potentiometric measurement device is connected to the electrodes for measuring the activity of the anhydride by measuring the difference of potential.