Métodos potenciométricos y conductimétricos de bajo costo: una revisión

Abstract

Potentiometry and conductometry are the most common electroanalytical methods in laboratories. One of the advantages of electrochemical methods is the possibility to construct low-cost, non-commercial instrumentation since the physical interaction and the physico-chemical response of the system are electrical in nature. Low-cost, non-commercial instrumentation provides access to methods for both research and teaching; it also allows adaptation to experimental designs or processes with specific requirements such as real-time monitoring. Several authors have worked on the development of low-cost potentiometric and conductometric instrumentation, implementing systems that contemplate from the electrodes to the measuring instrument. In this work, a review of low-cost, non-commercial potentiometric and conductometric methods is presented, starting from quite simple instrumentation to more advanced electronic circuits. The works discussed demonstrates that it is possible to construct potentiometric and conductometric instrumentation with analytical results within the requirements for chemical analysis.