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- Title
Determination of lead and cadmium using a polycyclodextrin-modified carbon paste electrode with anodic stripping voltammetry.
- Authors
Roa, Gabriela; Ramírez-Silva, M. T.; Romero-Romo, M. A.; Galicia, Laura
- Abstract
This work reports the use of α and β-cyclodextrin-modified carbon paste electrodes (CPEα-CD and CPEβ-CD) to determine simultaneously Pb(II) and Cd(II) by means of the electrochemical technique known as anodic stripping voltammetry (ASV). Both modified electrodes displayed good resolution of the oxidation peaks of the said metals. Statistic analysis of the results strongly suggests that the CPEβ-CD exhibited a better analytical response that the CPEα-CD, while the detection limits obtained for Pb(II) were 6.3×10-7 M for the CPEα-CD and 7.14×10-7 M for the CPEβ-CD, whereas for Cd(II) they were 2.51×10-6 M for the CPEα-CD and 2.03×10-6 M for the CPEβ-CD.
- Subjects
ELECTROCHEMICAL analysis; CARBON electrodes; LEAD; CADMIUM; ELECTROLYTIC oxidation; VOLTAMMETRY
- Publication
Analytical & Bioanalytical Chemistry, 2003, Vol 377, Issue 4, p763
- ISSN
1618-2642
- Publication type
Article
- DOI
10.1007/s00216-003-2126-4