METHOD OF MEASURING CONCENTRATION OF SUBSTANCE DISSOLVED IN LIQUID MEDIUM AND ANALYSER FOR REALISING SAID METHOD Russian patent published in 2011 - IPC G01N27/41 

FIELD: physics.

SUBSTANCE: method of measuring concentration of a substance dissolved in a liquid medium, based on measuring current of an amperometric primary transducer with a membrane which is permeable for the dissolved substance, placed in the analysed medium, comprises, with time averaging, measuring the distributed diffusion current using an assembly of microelectrodes, and geometric dimensions of the thickness of the membrane, diametre of the microelectrodes and distance between them is selected while ensuring quasi-spherical diffusion with a diffusion layer of the analysed substance without going beyond the outer surface of the membrane and without overlapping of diffusion layers of each of the microelectrodes. In the analyser of concentration measurements of the substance dissolved in the liquid medium, the measuring electrode of the amperometric primary transducer is in form of an assembly of microelectrodes. The thickness of the membrane and the distance between microelectrodes is not less than an order greater than the diametre of the microelectrodes.

EFFECT: faster and more accurate measurement.

3 cl, 5 dwg