▎ 摘　　要

NOVELTY - A screen printing electrode-based dihydroxybenzene isomer content detecting method involves stirring graphene in polyalkyl siloxane uniformly, treating ultrasonically for 1 hour to obtain a paste composite, printing a conductive silver paste on a polyester sheet by silk screen printing technology and drying. The resultant polyester sheet is printed with the paste composite by screen printing technique and dried at 90 degrees C for 30 minutes, followed by coating an insulating layer, drying at normal temperature for 30 minutes, carrying out electrochemical reduction process by using phosphate buffered saline solution under pH of 7 and drying again at normal temperature to obtain a modified screen printing electrode. The modified screen printing electrode is subjected to differential pulse voltammetry for measuring three isomerides of benzene, hydroquinone, catechol and resorcinol. USE - Method for detecting a screen printing electrode-based dihydroxybenzene isomer content. ADVANTAGE - The method enables detecting the screen printing electrode-based dihydroxybenzene isomer content with stable performance, better sensitivity and better accuracy, in a simple and cost-effective manner.