AMPEROMETRIC METHOD OF MEASUREMENT OF NITROUS OXIDE CONCENTRATION IN GAS MIXTURES Russian patent published in 2017 - IPC G01N27/48 

FIELD: measuring equipment.

SUBSTANCE: electrochemical cell with a cavity, formed by two discs of an oxygen-conducting solid electrolyte of 0.9 ZrO₂+0.1Y₂O₃, on the opposite surfaces of one of which the electrodes are located. It is placed in the flow of the analyzed gas mixture, electrodes are supplied with a DC voltage in the range from 1 to 2 V connecting the positive pole to the electrode located on the outer side of the disc, and the negative pole to the inner surface, whereby free oxygen and oxygen, obtained after decomposition of nitrous oxide from the cell cavity, are pumped out into the stream of the analyzed gas mixture at the working temperature of the cell, and upon reaching stationary state when the amount of the oxygen, pumped out from the cavity cell, would be equal to the amount of the oxygen, supplied to it. The limiting current, flowing through the cell, is measured. The concentration of nitrous oxide in the analyzed gas mixture is determined by the limiting current value of the oxygen amount, pumped out of the electrochemical cell cavity.

EFFECT: ability of amperometrical measurement of the concentration of nitrous oxide in a gas mixture with the aid of an easy-to-manufacture and easy-to-operate measuring device based on an oxygen-conducting solid electrolyte.

6 dwg