SELECTIVE DETECTION OF ACETYLENE GAS EXTRACTED FROM ISOLATION OIL BY AN ELECTROCHEMICAL SENSOR USING A GOLD ELECTRODE

The selective detection of acetylene in gases extracted from isolation oils has been studied to develop an electrochemical sensor for the diagnostic monitoring of the condition of in-service electrical instruments. Effects of coexisting gases (CH4, C2H6, C2H4, H-2 and CO) on the oxidation current of C2H2 were tested using gas-permeable gold-coated and platinum-black electrodes as the sensor. The gold-coated electrode showed good behaviour for the selective current detection of acetylene under potentiostatic conditions (-0.1 V/Pt-black reference electrode) in 10 M H2SO4 electrolyte solution.