▎ 摘　　要

NOVELTY - The method comprises degreasing an electrode material, and coating the degreased electrode material with a liquid mixture. The mixture comprises a dispersion of a graphene-type material in an organic solvent. The graphene-type material comprises hydroxyl groups. The graphene-type material is made of humic acid using catalytic hydrogenation, where the humic acid is extracted from leonardite. The catalytic hydrogenation includes a catalyst, and is conducted in a Parr reactor at 160 degrees C. A reaction product of the catalytic hydrogenation is passed through an acidic ion exchange column. USE - The method is useful for forming an electrode, which is useful in a sensor (claimed) for identifying microbes and counting microbes and determining antimicrobial sensitivity. ADVANTAGE - The method allows rapid and economical formation of the electrode with high conductivity and sensitivity thus providing simple, automatic, accurate and rapid detection of microbes. DETAILED DESCRIPTION - The method comprises degreasing an electrode material, and coating the degreased electrode material with a liquid mixture. The mixture comprises a dispersion of a graphene-type material in an organic solvent. The graphene-type material comprises hydroxyl groups, and is made of humic acid using catalytic hydrogenation, where the humic acid is extracted from leonardite. The catalytic hydrogenation includes a catalyst, and is conducted in a Parr reactor at 160 degrees C. A reaction product of the catalytic hydrogenation is passed through an acidic ion exchange column. The electrode material includes a metal, a metal salt, or a metal oxide. The step of degreasing includes treating the electrode material with the organic solvent. The coating includes dip coating, spray coating, brush coating, stamp coating, lithographic coating and/or UV light lithographic coating. The graphene-type material is present in the dispersion at a concentration of less than 1.8-2.5 wt.% An INDEPENDENT CLAIM is included for a sensor.