Электрохимический мультисенсорный экспресс-анализ алкалоидов в формате "электронный язык"

Abstract

The paper presents a method of multisensor inversion voltammetry to detect and identify the alkaloids macro quantity in a test sample. In contrast to the existing multisensor systems using a set of indicating electrodes, the proposed method envisages a line of sensors formed on the surface of a single planar three-electrode system at introducing in the background electrolyte a number of transition metal ions and forming complexes with the sample toxic substances of the sample. Effect of each organic substance on the electrochemical behavior of the multisensor test system is different; therefore, it becomes possible to use the electrolyte solution containing a set of cations of various metals as the test system. The developed method advantage lies in obtaining reliable results with low labor intensity and in high efficiency of the analysis. Taking into account specifics of the substances under identification, composition of the electrochemical test system was optimized, and information parameters characterizing the alkaloids presence in the test sample were identified. Successful application of the proposed method in analytical studies leads to its implementation in the electronic tongue format. Based on the results of the research conducted, a method of analysis is proposed that with high reliability makes it possible to detect and identify alkaloids both in the laboratory and in the out-of-laboratory conditions