Premium
Towards Normalising Variability in Current Responses at Glassy Carbon Electrodes Using Double Layer Capacitance; a Case Study of Citrinin
Author(s) -
Niland Michael J.,
Fogel Ronen,
Flanagan Shane P.,
Limson Janice L.
Publication year - 2012
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.201100645
Subject(s) - glassy carbon , double layer capacitance , analyte , electrode , analytical chemistry (journal) , capacitance , double layer (biology) , faradaic current , chemistry , materials science , layer (electronics) , cyclic voltammetry , chromatography , electrode potential , electrochemistry , nanotechnology , dielectric spectroscopy
Heterogeneity in surface condition is a widely reported factor of carbonaceous electrodes that leads to irreproducibility in faradaic current response(s) ( I p ). As I p and double layer capacitances ( C dl ) are similarly influenced by surface associated parameters, we report on a method aimed at exploiting that interaction to normalise I p variability of adsorptive analytes across inconsistent electrode surface preparations. A linear correlation was observed between C dl and I p to citrinin and 1,2,4‐benzenetriol. By rendering I p a factor of C dl , the coefficient of variation of I p was reduced to a third of original responses on assessed surfaces permitting determination of analyte solution concentration.