▎ 摘　　要

NOVELTY - The apparatus has an electrochemical sensor apparatus that facilitates an electrochemical reaction of a liquid sample. The electrochemical sensor apparatus comprises an electrode system. The electrode system comprises a working electrode, a reference electrode and a counter electrode. The working electrode comprises the graphene ink. The reference electrode comprises the silver chloride. The counter electrode comprises the carbon. USE - Apparatus for measuring ascorbate concentration in liquid sample.