Three electrode electrochemical microfluidic cell: construction and characterization

Journal of the Brazilian Chemical Society

Richter, Eduardo M.¹  Almeida, Edimar G. N. de¹  Silva, Rodrigo A. B. da¹  Rabelo, Adriano C.¹  Silva, Abílio T. C. da¹  Ferreira, Lucas F.¹  Universidade Federal de Uberlândia, Uberlândia, Brazil¹ 

关键词: microfluidic cell;    microchannels;    gold film;    graphite-epoxy composite;    silver-epoxy composite;    pseudo-reference;   

DOI  :  10.1590/S0103-50532009000700006

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

This work describes the construction and characterization of an electrochemical flow-through microcell with the three electrodes (working, pseudo-reference, and auxiliary) inserted in microchannels with thickness smaller than 20 µm. These microchannels were constructed between two stacked polycarbonate slides using one or more overlapped toner masks as spacer. This strategy allows the construction of microcells with a variable internal volume on the working electrode (0.6 to 2.4 µL). Three different materials were optimized as electrodes: gold film or graphite-epoxy composite as working electrode, silver-epoxy composite as pseudo-reference electrode and, graphite-epoxy composite as auxiliary electrode. The performance of the microfluidic cell was characterized by cyclic voltammetry, potentiometric stripping analysis at constant current, and square wave anodic stripping voltammetry using ferrocyanide and heavy metals (Cu2+, Hg2+, Pb2+, and Cd2+) as model analytes.

【 授权许可】

Unknown