▎ 摘　　要

NOVELTY - Nanocomposite based electrochemical detection sensor of etidronic acid comprises gold printed circuit board substrate and reduced graphene oxide-silver-silicon dioxide nanocomposite formed on the gold printed circuit board substrate. USE - The nanocomposite based electrochemical detection sensor of etidronic acid is useful as chemical detection sensor. ADVANTAGE - The electrochemical detection sensor has excellent stability, repeatability and reproducibility. DETAILED DESCRIPTION - An INDEPENDENT claim is also included for manufacturing the nanocomposite based electrochemical detection sensor of etidronic acid, comprising (a) preparing a silver-silicon dioxide nanocomposite, (b) preparing reduced graphene oxide, (c) preparing a reduced graphene oxide-silver-silicon dioxide nanocomposite by mixing silver-silicon dioxide and reduced graphene oxide, and (d) forming a layer including the reduced graphene oxide-silver-silicon dioxide nanocomposite on the gold printed circuit board substrate.