▎ 摘　　要

NOVELTY - Preparing dopamine-sensitive sensor comprises preparing solution comprising graphene oxide (GO), 3,4-ethylenedioxythiophene (EDOT), and polystyrene sulfonate (PSS), and immersing, in the solution, electrodes having a reference electrode, a counter electrode, and a working electrode formed on a support, and applying current to the working electrode to selectively deposit GO/PEDOT:PSS, where the solution comprises 0.0003-0.0015 mol EDOT relative to 1 g of GO, and the molar ratio of EDOT and PSS is 1:7-13. USE - The method is useful for: preparing dopamine-sensitive sensor useful for diagnosing an abnormal dopamine secretion-related disease e.g. depression, schizophrenia, attention deficit/hyperactivity disorder (ADHD), psychosis, or Parkinson's disease (all claimed). ADVANTAGE - The method provides quantitative analysis of dopamine at excellent selectivity and high linearity with concentrations even in the presence of interfering substances. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) dopamine-sensitive sensor equipped with electrodes having a reference electrode, a counter electrode, and a working electrode formed on a support, the working electrode comprising a selectively deposited GO/PEDOT:PSS layer, where the GO/PEDOT:PSS layer comprises 0.0003-0.0015 mol EDOT relative to 1 g of GO, and the molar ratio of EDOT and PSS is 1:7-13; (2) detecting dopamine, comprising bringing the electrodes of the sensor into contact with dopamine-containing sample to perform differential pulse voltammetry (DPV); and (3) providing information for diagnosing an abnormal dopamine secretion-related disease, comprising quantitatively analyzing a sample by using the method for detecting dopamine, the sample being isolated from a subject suspected of abnormal dopamine secretion.