▎ 摘　　要

NOVELTY - A graphene-porphyrin organic nanomaterial modified electrode is prepared by taking substrate electrode, polishing and cleaning, adding graphene-porphyrin organic nanomaterial dispersion liquid, and modifying; where graphene-porphyrin organic nanomaterial is prepared by taking oxidized graphene water solution, and adding porphyrin organic compounds and strong alkali. USE - Method for preparing graphene-porphyrin organic nanomaterial modified electrode used for detecting lead ion (claimed). ADVANTAGE - The product has good electrochemical performance, wide detection range and has small interference.