AMPEROMETRIC METHOD FOR MEASURING THE CONTENT OF CARBON MONOXIDE IN INERT GASES Russian patent published in 2021 - IPC G01N27/406 G01N27/407 

FIELD: measuring equipment.

SUBSTANCE: invention relates to measuring equipment and can be used to measure the concentration of carbon monoxide in inert gases and other oxygen-free gaseous media. The amperometric method for measuring the concentration of carbon monoxide in inert gases is that an electrochemical cell with a cavity formed by two gas-tightly interconnected disks of oxygen-conducting solid electrolyte, between which there is a capillary, is placed into the flow of the analyzed gas mixture, on electrodes located on opposite surfaces of one from the disks, DC voltage is supplied within 0.5-1 V, with the connection of the positive pole to the outer electrode, whereby electrolysis of water vapor in the analyzed gas is carried out, and the oxygen obtained as a result of electrolysis is pumped from the flow of the analyzed gas into the sensor cavity along the electrochemical circuit: outer electrode - solid electrolyte - inner electrode, in the process of reaching a stationary state, when the diffusion flux of the interaction products of oxygen pumped into the cavity and carbon monoxide in the cavity becomes equal to the amount of carbon monoxide in the analyzed gas entering the cavity, the limiting current flowing through the sensor is measured and the value of the limiting current corresponding to the oxygen content spent on interaction with carbon monoxide, determine the concentration of carbon monoxide in the analyzed gas.

EFFECT: ability to measure the content of carbon monoxide in inert gases at temperatures of 500÷650°C and above, as well as improving the accuracy and reproducibility of measurements.

1 cl, 3 dwg