title: Determination of lead and cadmium using a polycyclodextrin-modified carbon paste electrode with anodic stripping voltammetry.
abstract: This work reports the use of alpha and beta-cyclodextrin-modified carbon paste electrodes (CPE(alpha-CD) and CPE(beta-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 CPE(beta-CD )exhibited a better analytical response that the CPE(alpha-CD), while the detection limits obtained for Pb(II) were 6.3 x 10(-7) M for the CPE(alpha-CD) and 7.14 x 10(-7) M for the CPE(beta-CD), whereas for Cd(II) they were 2.51 x 10(-6) M for the CPE(alpha-CD) and 2.03 x 10(-6) M for the CPE(beta-CD).
authors.affiliation: Depto. de Química, Universidad Autónoma Metropolitana-Iztapalapa, Apdo. Postal 55-532, 09340 México, D.F. Méxiko.
authors.forename: Gabriela
authors.initials: G
authors.lastname: Roa
authors.forename: M T
authors.initials: MT
authors.lastname: Ramírez-Silva
authors.forename: M A
authors.initials: MA
authors.lastname: Romero-Romo
authors.forename: Laura
authors.initials: L
authors.lastname: Galicia
mesh_terms: D002104:Cadmium / Q000032:analysis*; D002244:Carbon / Q000737:chemistry*; D003505:Cyclodextrins; D004563:Electrochemistry / Q000379:methods*; D004566:Electrodes; D004785:Environmental Pollutants / Q000032:analysis; D007854:Lead / Q000032:analysis*; D011108:Polymers; D011199:Potentiometry / Q000379:methods
chemical_list: D003505:Cyclodextrins; D004785:Environmental Pollutants; D011108:Polymers; D002104:Cadmium; D007854:Lead; D002244:Carbon