通过电化学聚合制备的聚苯胺掺杂土霉素修饰铂电极可以作为一种广谱响应的电位传感器，对近二十种无机及有机阴离子，其电位—浓度对数值呈一定的线性关系。该全固态电极制备方便，响应速度快，稳定性及重现性好，内阻小。结合有关伏安曲线研究，表明掺杂的可能机理是土霉素参与苯胺的电化学聚合成为聚合物膜的一部分，并对电极的响应机理进行了初步探讨。 Polyaniline-doped oxytetracycline modified platinum electrode prepared by electrochemical polymerization can be used as a broad-spectrum response potential sensor, and its potential-concentration logarithm to a certain linear relationship for nearly twenty inorganic and organic anions. The solid-state electrode preparation is convenient, fast response, good stability and reproducibility, small internal resistance. Combined with the investigation of voltammetry, it is shown that the possible mechanism of doping is that oxytetracycline participates in the electrochemical polymerization of aniline into a part of the polymer film, and the response mechanism of the electrode is also discussed.