Estado da arte sobre “a construção de potenciostatos de baixo custo” para o ensino de química

Abstract

Cyclic voltammetry is a thriving field in novelties and different analysis methods are employed in the qualitative and quantitative determination of analytes in studies, such as the detection of toxic metals and product adulteration. The potentiostat used in cyclic voltammetry is composed of 03 electrodes, a working electrode; reference electrode and counter electrode/auxiliary electrode. What impacts the acquisition of devices, thus limiting research and use in laboratories in practical classes of Chemistry discipline. Thus, this project aims to carry out state-of-the-art research on the construction of low-cost potentiostats in course completion works, dissertations and theses, in different database platforms in Brazil. Twenty platforms were selected to carry out the research of the keywords, “potentiostat” and “development of a potentiostat” in order to find course conclusion works, dissertations and theses that presented the development of low-cost and portable potentiostats for use in specific searches. Then, some problem-questions were defined to support the discussions and interpretations of the works, such as: “Which/what were/is the justification/s of the work?”; “What/what were/is the objective/s of the work?” “How was the methodology and materials used defined?” and “What were the results and conclusions of the research?”. It was found and discussed 6 works, being 4 dissertations; 1 thesis and 1 course conclusion work, in 2007; 2013; 2016; 2019 and 2021, in the Southeast regions (4 works); north (1 job) and midwest (1 job). One can dare to say that the construction of a potentiostat is not easy to perform, some of these authors found were important to mention their mistakes, demonstrating that such research needs a lot of theoretical foundation and interdisciplinary knowledge in the areas of Physics, Electronics and Chemistry. It is possible to express that the study of the State of the Art allows the researcher to go into the “intimate” of the works he is verifying, based on the problem-questions to structure their paths and carry out an interpretation according to their objectives.