▎ 摘　　要

NOVELTY - Graphene-sensitized optical fiber lactic acid sensor comprises an optical fiber and nickel plating layer, where graphene layer is grown at the polishing area of the optical fiber after melting and tapering. The nickel plating layer is coated at the graphene layer. USE - The graphene-sensitized optical fiber lactic acid sensor is used for detection of lactic acid concentration (claimed). ADVANTAGE - The nickel sensitive material and optical fiber are stably combined, so as to manufacture the optical fiber lactic acid sensor, which has good linear fitting degree and repeatability for the low concentration lactic acid measurement. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the sensor comprising melting and tapering the optical fiber, growing graphene at the polishing area, and oxidizing to obtain graphene oxide layer, preparing nickel plating solution by nickel sulfate solution and reducing agent solution, and soaking the graphene oxide layer of the optical fiber in the nickel plating solution.