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Ionic Liquid‐Carbon Nanotube Modified Screen‐Printed Electrodes and Their Potential for Adsorptive Stripping Voltammetry
Author(s) -
Gan Patrick,
Foord John S.,
Compton Richard G.
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.201400214
Subject(s) - ionic liquid , hexafluorophosphate , electrode , adsorptive stripping voltammetry , carbon nanotube , stripping (fiber) , anodic stripping voltammetry , voltammetry , pyridinium , cyclic voltammetry , materials science , ionic bonding , chemistry , inorganic chemistry , chemical engineering , electrochemistry , nanotechnology , organic chemistry , ion , composite material , catalysis , engineering
Compared with paraffin oil, the use of ionic liquids as a binder in carbon paste type electrodes was shown to greatly enhance the accumulation of analytes, as illustrated with 17α‐ethynylestradiol as a model. The ionic “liquid” n ‐octyl‐pyridinium hexafluorophosphate [C 8 py][PF 6 ] was most efficient among several ionic liquids investigated. Such preconcentration allowed a [C 8 py][PF 6 ]‐multiwalled carbon nanotubes (MWCNTs) (95 : 5 w/w) composite electrode to be useful for adsorptive stripping voltammetry. Screen‐printed electrodes modified with [C 8 py][PF 6 ]‐MWCNTs were developed and were able to achieve high sensitivity during adsorptive stripping voltammetric measurements under optimised conditions.