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Electrochemical Characterization and Determination of Mercury Using Carbon Paste Electrodes Modified with Cyclodextrins
Author(s) -
RoaMorales Gabriela,
RamírezSilva M. T.,
González Rosendo López,
Galicia Laura,
RomeroRomo M.
Publication year - 2005
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.200403099
Subject(s) - carbon paste electrode , mercury (programming language) , electrode , electrochemistry , detection limit , materials science , chemistry , nuclear chemistry , chromatography , cyclic voltammetry , computer science , programming language
In this work the characterization and determination of mercury in HClO 4 media using carbon paste electrodes modified with α‐ and β‐cyclodextrins (CPE α‐CD and CPE β‐CD ) at E d =−0.7 V with a t d = 20 s and a potential scan v =20 mV s −1 is studied‥ The statistical results obtained indicate that the modified electrodes displayed a better analytical performance as compared to that obtained with the unmodified CPE. The detection limits for the CPE α‐CD and for the CPE β‐CD were 0.05 and 0.09 μM, respectively, while for the CPE it was 0.41 μM. The CPE β‐CD exhibited greater sensitivity as compared to that of the CPE α‐CD .