Three electrode electrochemical microfluidic cell: construction and characterization (original) (raw)

2009, Journal of The Brazilian Chemical Society

Recebido em 6/10/09; aceito em 25/1/10; publicado na web em 3/5/10 DEVELOPMENT, CHARACTERIZATION AND ELECTROANALYTICAL APPLICATION OF A FLUID COMPOSITE MADE OF EPOXY ADHESIVE, GRAPHITE, AND CICLOHEXANONE. A fluid conducting composite material prepared from graphite powder, commercial epoxy resin Araldite ® , and cyclohexanone has been developed. The composition was optimized considering the mechanical properties as conductivity and adhesiveness using response surface methodology. This work employed cyclic voltammetry and amperometry to investigate the characteristics of such composite electrodes without and with the insertion of Prussian blue in the electrode body (bulk modified electrode). The composite electrodes were also successfully used for the amperometric detection of hydrogen peroxide at 0.0V vs Ag/AgCl. Figura 1S. Etapas de construção dos eletrodos à base de compósito de grafite. (1) Fixação de um fio de cobre (f ≈ 1,5 mm) no interior de uma ponteira de micropipeta de polietileno (10-100 mL); (2) introdução do compósito, ainda fluido, na cavidade inferior; (3) após o tempo de cura (24 h), polimento do conjunto até que o compósito apresente o mesmo nível da ponteira