Construction and evaluation of a carbon paste electrode modified with polyaniline-co-poly(dithiodianiline) for enhanced stripping voltammetric determination of metal ions
ČlánekOtevřený přístuppeer-reviewedpublishedDatum publikování
2014
Vedoucí práce
Oponent
Název časopisu
Název svazku
Vydavatel
Univerzita Pardubice
Abstrakt
A modified carbon paste electrodes (MCPE) have been prepared in this study as an alternative “mercury-free” electrochemical sensor for the determination of Pb2+ and Cd2+ metal ions in aqueous solutions. CPE containing a conducting copolymer of polyaniline-co-poly(2,2'-
dithiodianiline) (PANI-co-PDTDA) was used as a modified substrate transducer to achieve enhanced selectivity in stripping voltammetric analysis. The experimental conditions optimised included the supporting electrolyte pH, deposition potential (Ed) and time (td), set at −0.6 V vs.
ref. for Pb2+ and −0.8 V for Cd2+; both kept for td = 120 s. The results with the CPE/PANI-co-
PDTDA sensor have revealed the linear range within the range of 0.15 – 0.5 μg/L for Pb2+ and
the same interval for Cd2+. Finally, the electrode of interest, CPE/PANI-co-PDTDA, can be
characterised by the LODs of 0.03 and 0.09 μg/L for Pb2+ and Cd2+ respectively.
Rozsah stran
p. 143-154
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Zdrojový dokument
Sensing in Electroanalysis. (K. Kalcher, R. Metelka, I. Švancara, K. Vytřas; Eds.). 2013/2014, Volume 8.
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open access
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ISBN
978-80-7395-782-7 (print)
978-80-7395-783-4 (pdf)
978-80-7395-783-4 (pdf)
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Klíčová slova
carbon paste electrode, PANI-co-PDTDA, differential pulse anodic stripping voltammetry, lead and cadmium, determination