▎ 摘　　要

NOVELTY - A carbon paste electrode comprises a carbon paste, an electrode tube, an electrode lead and a graphene oxide layer, where the electrode tube having a first end and a second end opposite to each other, the carbon paste is pressed into the electrode tube from the first end, the electrode lead is in contact with the carbon paste and leads from the second end, and the graphene oxide layer is formed on the surface of the first end. USE - Carbon paste electrode. ADVANTAGE - The carbon paste electrode can be prepared with long service life, better stability, high sensitivity, better reproducibility and better characteristics in simple and cost-effective manner. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following: (1) a method for preparing carbon paste electrode (2) a method for detecting hydroquinone.