▎ 摘　　要

NOVELTY - A graphene/polydiacetylene composite film preparation method involves preparing a graphene film, preparing a chloroformic solution of 10,12-diacetylenic acid, dipping the graphene film in the chloroformic solution of 10,12- diacetylenic acid for reacting in dark conditions and irradiating by using an UV lamp. USE - Method for preparing a graphene/polydiacetylene composite film that is utilized for detecting an organic gas (claimed). ADVANTAGE - The method enables preparing the film with better dispersity, high sensitivity and high transmittance, and providing a substrate material with high quality for preparing a grapheme/polydiacetylene film sensor. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for quantitatively detecting an organic gas by applying the composite film.