Single Oil Drop Electrochemistry on a Screen-Printed Electrode Surface

E. S. OLIVEIRA; P. A. FIORITO; H.B. SUFFREDINI

ELECTROANALYSIS

WILEY-V C H VERLAG GMBH

Lugar: Weinheim; Año: 2014 p. 1660 - 1663

1040-0397

The use of a contaminated single oil drop on a screen-printed carbon electrode is described for the first time here. The simple methodology developed herein opens the possibility of conducting such measurements. R-(+)-limonene oil, some samples of which were contaminated with 4-nitrophenol (4-NP), was used as the oil phase, and BrittonRobinson (BR) buffer was used as the aqueous phase. An oxidation peak at approximately 0.8 V vs. Ag was obtained when the system comprised an oil/water interface. The charge transfer resistance decreased by a factor of approximately 7.1 when an interfacial system composed of two immiscible liquids was used as an electrochemical tool.