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Single Oil Drop Electrochemistry on a Screen‐Printed Electrode Surface
Author(s) -
Oliveira Etienne S.,
Fiorito Pablo A.,
Suffredini H. B.
Publication year - 2014
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201400213
Subject(s) - electrochemistry , drop (telecommunication) , electrode , aqueous two phase system , materials science , phase (matter) , limonene , chemical engineering , analytical chemistry (journal) , chemistry , chromatography , organic chemistry , computer science , telecommunications , essential oil , engineering
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.