METHOD AND APPARATUS FOR DETERMINING O2 AND N2O IN GAS MIXTURES

摘要

A method for determining relative amounts of O2 and N2O in gas mixtures byquantitativeelectrochemical reaction including feeding a gas mixture containing O2 and N2Oto a zinc-air cellhaving electrodes connected to a circuit consisting of a plurality of diodesand resistors, which circuitis set to have an electrochemical working range corresponding to each of theO2 and N2O; andmeasuring current flowing in the respective working range to determine therelative proportions ofO2 and N2O in the gas mixture.An electrochemical cell including a casing capable of containing a gasmixture, including O2and N2O a zinc-air cell in the casing, and a circuit connected to electrodesof the zinc-air cell, thecircuit containing a plurality of diodes, resistors and tap points; means formeasuring current todetermine the relative proportions of O2 and N2O in the gas mixture.