▎ 摘　　要

NOVELTY - A noble metal composition comprises 10-20 wt.%. noble metal, 40-60 wt.%. modified polylactic acid and polycarbonate copolymer and 20-50 wt.%. oxidation graphene. The noble metal comprises gold, silver, platinum, palladium, osmium, iridium and alloy. USE - Noble metal composition for use in electrochemical sensor (claimed). ADVANTAGE - The composition has better electric conductivity and low resistance, and improves precision of electrochemical sensor. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a noble metal composition preparation method involves obtaining particle diameter at 10-5o00nm by using a V type mixer, obtaining molecular weight of polylactic acid modified polycarbonate copolymer at 10, 000-800, 000 %, emitting high frequency induction heat plasma device to plasma atmosphere under argon atmosphere by using mixed powder, recovering fine powder product, obtaining composite particle under lower argon atmosphere, adding the composite particle in the oxidation graphene, obtaing mixed powder by using planetary mill full mixing process, performing mixed powder dring process at 500-950 ?0C and heating at 0.5-2.5 hours, reducing obtained temperature, filling argon gas continously and placing electrode carrier in exit position part for preparing electrode.