▎ 摘　　要

NOVELTY - A carbon-based electrode is obtained by forming a yellow colored product using graphite, sulfuric acid, potassium persulfate, phosphorus pentoxide, potassium permanganate, sulfuric acid, pure water and hydrogen peroxide, filtering the yellow product from a mixture using filter paper, washing the resulting product using warm pure water, drying the resulting material to obtain graphene nanoribbons, mixing resulting nanoribbons with coal tar pitch, heating the resulting mixture in presence of nitrogen, and shaping the resulting material. USE - Carbon-based electrode is used for detection of biological species. ADVANTAGE - The carbon-based electrode accurately detects even very small quantities of biological species, and can be economically manufactured. DETAILED DESCRIPTION - A carbon-based electrode is obtained by mixing graphite and sulfuric acid in a magnetic stirrer, adding potassium persulfate and phosphorus pentoxide to the mixture, cooling the mixture to 1 degrees C in an ice bath, gradually adding potassium permanganate and sulfuric acid to the resulting mixture, gradually raising the temperature to 35 degrees C, and continuing mixing, adding the mixture to the ice bath, dripping in pure water and hydrogen peroxide until development of yellow color, mixing the resulting mixture, filtering the mixture using filter paper, washing the resulting product using warm pure water, drying the resulting material to obtain graphene nanoribbons, mixing resulting nanoribbons with coal tar pitch, heating the resulting mixture in presence of nitrogen, and shaping the resulting material.