▎ 摘　　要

NOVELTY - A graphene oxide-nano platinum composite material-based cysteine detecting method involves utilizing graphene oxide-nano platinum composite material to simulate the peroxidase activity and the developing process of catalytic hydrogen peroxide oxidized 3,3',5,5'-tetramethylbenzidine dihydrochloride. USE - Method for detecting graphene oxide-nano platinum composite material-based cysteine (claimed) and for determining cysteine capsule content. ADVANTAGE - The method enables detecting graphene oxide-nano platinum composite material-based cysteine with concentration of within 25-5000 nmole/l, linear correlation r of 0.998 and detection limit of 1.2 nmol/l.