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Quasi‐simultaneous Mapping of Local Current Density, pH and Dissolved O 2
Author(s) -
Taryba Maryna G.,
Montemor M. F.,
Lamaka S. V.
Publication year - 2015
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.201500286
Subject(s) - optode , amperometry , analytical chemistry (journal) , current (fluid) , electrode , current density , materials science , capillary action , microelectrode , chemistry , electrochemistry , chromatography , physics , membrane , composite material , quantum mechanics , thermodynamics , biochemistry
For the first time we report on quasi‐simultaneous mapping of local current density, pH and concentration of dissolved O 2 . The three micro‐probes were positioned 50 micron apart from each other and 50 to 100 µm above the cut‐edge metal coated steel sample. The vibrating probe recorded the local current density and glass‐capillary micro‐electrode measured local pH. Additionally, two different micro‐probes were used for DO measurements: either an amperometric micro‐probe or micro‐optode was coupled with the other two sensors using the triple head stage. The data on local distributions were acquired quasi‐simultaneously (within ≤ 2.8 s) and, hence, are correlated in space and time.