▎ 摘　　要

NOVELTY - Determining food cochineal content using graphene supported platinum atom-based composite material involves taking chloroplatinic acid solution, feeding to underwater arc discharge device, soaking pure graphite rod electrodes in water, adjusting current and voltage to 80 A and 30 V, controlling discharge time, cooling, collecting solution surface layer, vacuum drying, polishing glassy carbon electrode with alpha -alumina powder, cleaning, dispersing in high purity water, ultrasonic dispersing, and using modified glassy carbon electrode using as working electrode. USE - Method for determining food cochineal content using graphene supported platinum atom-based composite material (claimed). DETAILED DESCRIPTION - Determining food cochineal content using graphene supported platinum atom-based composite material comprises taking chloroplatinic acid solution, feeding to underwater arc discharge device, soaking pure graphite rod electrodes in water, adjusting current and voltage to 80 A and 30 V, controlling discharge time, cooling, collecting solution surface layer, vacuum drying, polishing glassy carbon electrode with alpha -alumina powder, cleaning, dispersing in high purity water, ultrasonic dispersing, using modified glassy carbon electrode using as working electrode, calomel electrode as reference electrode and platinum electrode as auxiliary electrode, placing in phosphate buffer solution, stirring, standing, cyclic voltammetry scanning, recording voltammetry curve, analyzing peak current, scanning, determining cochineal content, drawing standard curve, linear regressing, repeating method using actual samples, obtaining peaks, substituting data to regression equation, and calculating cochineal content.