Resumen

COUTINHO, Cláudia F. B. et al. Development of instrumentation for amperometric and coulometric detection using ultramicroelectrodes. J. Braz. Chem. Soc. [online]. 2008, vol.19, n.1, pp. 131-139. ISSN 0103-5053.  http://dx.doi.org/10.1590/S0103-50532008000100019.

In this work it is presented the development of a simple, portable and inexpensive instrumentation for amperometric and coulometric detection in different analytical instrumentation systems utilizing ultramicroelectrodes. The software, developed in LabVIEW 7.1^TM, is capable to carry out three main detection techniques (amperometric, pulsed amperometric and coulometric detection) and a voltammetric technique (cyclic voltammetry). The instrumentation was successfully evaluated using the following systems: cyclic voltammograms of metallic electrodes in alkaline solutions, flow electrochemical detection of glucose and glycine and direct determination of herbicide glyphosate (electrochemical detection coupled to HPLC).

Palabras llave : instrumentation; portable; electrochemical detection; ultramicroelectrodes; flow system.