▎ 摘　　要

NOVELTY - Electrochemical sensor electrode comprises screen-printed carbon electrodes, whose surface is modified with a cross-linked polymer of bovine serum albumin and aminated graphene oxide, where flower-shaped bismuth tungstate material is supported on the cross-linked polymer. The bovine serum albumin, laminated graphene oxide,mixture of glutaraldehyde are dripped on the screen printing carbon electrode surface polymerization by in-situ cross-linking polymerization method. USE - The electrode is useful for fast and simultaneously detecting lead ion and cadmium ion (claimed). ADVANTAGE - The electrochemical sensor electrode has high sensitivity, accurate result, simple operation, easy to carry, recyclable use and can realize fast quantitative analysis and detection of heavy metal lead and cadmium in the water without pre-processing. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparation method of electrochemical sensor electrode; and (2) fast and simultaneously detecting lead ion and cadmium ion.