▎ 摘　　要

NOVELTY - The method involves synthesizing copper aluminum oxide (CuAlO2)/reduction graphene-tetraethylenepentaammonia (rGO-TEPA) composite material by solvent thermal method. The CuAlO2/rGO-TEPA composite material is taken as electrode substrate material. Electrodepositing precess of gold-platinum nanoparticles (AuPtNPs) is performed. A dopamine-dopamine (DA) electrochemical sensor is prepared by using a DNA aptamer. Bovine serum albumin (BSA) is used to seal an active site of a non-adsorbed adenosine aptamer on a working electrode for preparing the DA electrochemical sensor. USE - Method for preparing an electrochemical sensor based on DNA aptamer for dopamine detection. ADVANTAGE - The method enables preparing the electrochemical sensor with high sensitivity and strong anti-interference detection of DA in human body liquid, thus specifically recognizing the DA, widening the detection range, and improving the sensitivity of detection. DESCRIPTION OF DRAWING(S) - The drawing shows a flow diagram illustrating an electrochemical sensor preparation method for dopamine detection based on DNA aptamer. (Drawing includes non-English language text).