Signal splitting in the stripping analysis of heavy metals using bismuth film electrodes:: Influence of concentration range and deposition parameters

被引:19
作者
Alberich, Nuria Serrano Aristides [1 ]
Diaz-Cruz, Jose Manuel [1 ]
Arino, Cristina [1 ]
Esteban, Miquel [1 ]
机构
[1] Univ Barcelona, Fac Quim, Dept Quim Analit, E-08028 Barcelona, Spain
关键词
stripping chronopotentiometry (SCP); anodic stripping voltammetry (ASV); bismuth film electrode (BiFE); signal splitting; multivariate curve resolution by alternating least squares (MCR-ALS);
D O I
10.1016/j.electacta.2008.04.055
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The stripping signals of Pb(II), Cd(II) and Zn(II) in a bismuth film electrode (BiFE) ex situ plated on glassy carbon support were studied by differential pulse anodic stripping voltammetry and constant-current stripping chronopotentiometry. Regular signals were measured for Pb(II), with a good linearity inside a wide concentration range. In contrast, Cd(II) and Zn(II) produce two overlapping signals, one predominating at low metal concentrations and the other at high metal concentrations. For the detailed study of such peak splitting, multivariate curve resolution by alternating least squares has been used concluding that the total area becomes linear with metal concentration in both situations. The reasons of the peak splitting seem to be related to the accumulation of the reduced metal on BiFE in different ways. Even with that complication, the fact that the linear relationship total area versus concentration is hold reinforces the applicability of BiFE for the determination of total concentrations of metal ions inside a wider concentration range than that initially expected. However, the coexistence of signals at different characteristic potentials anticipates important difficulties in the analysis of potential shifts caused by heavy metal complexation. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码:6616 / 6622
页数:7
相关论文
共 27 条
[1]   Stripping voltammetry for the determination of trace metal speciation and in-situ measurements of trace metal distributions in marine waters [J].
Achterberg, EP ;
Braungardt, C .
ANALYTICA CHIMICA ACTA, 1999, 400 :381-397
[2]   Potential shift correction in multivariate curve resolution of voltammetric data.: General formulation and application to some experimental systems [J].
Alberich, Aristides ;
Diaz-Cruz, Jose Manuel ;
Arino, Cristina ;
Esteban, Miquel .
ANALYST, 2008, 133 (01) :112-125
[3]  
[Anonymous], 1992, METALS HDB, V3
[4]   VOLTAMMETRIC DETERMINATION OF TRACE-METALS AND ORGANICS AFTER ACCUMULATION AT MODIFIED ELECTRODES [J].
ARRIGAN, DWM .
ANALYST, 1994, 119 (09) :1953-1966
[5]   Polarography and voltammetry at mercury electrodes [J].
Barek, J ;
Fogg, AG ;
Muck, A ;
Zima, J .
CRITICAL REVIEWS IN ANALYTICAL CHEMISTRY, 2001, 31 (04) :291-309
[6]   A study of pencil-lead bismuth-film electrodes for the determination of trace metals by anodic stripping voltammetry [J].
Demetriades, D ;
Economou, A ;
Voulgaropoulos, A .
ANALYTICA CHIMICA ACTA, 2004, 519 (02) :167-172
[7]   Bismuth-film electrodes: recent developments and potentialities for electroanalysis [J].
Economou, A .
TRAC-TRENDS IN ANALYTICAL CHEMISTRY, 2005, 24 (04) :334-340
[8]   Multivariate curve resolution with alternating least squares optimisation:: a soft-modelling approach to metal complexation studies by voltammetric techniques [J].
Esteban, M ;
Ariño, C ;
Díaz-Cruz, JM ;
Díaz-Cruz, MS ;
Tauler, R .
TRAC-TRENDS IN ANALYTICAL CHEMISTRY, 2000, 19 (01) :49-61
[9]   Chemometrics for the analysis of voltammetric data [J].
Esteban, M ;
Ariño, C ;
Díaz-Cruz, JM .
TRAC-TRENDS IN ANALYTICAL CHEMISTRY, 2006, 25 (01) :86-92
[10]   STRIPPING ELECTROANALYTICAL TECHNIQUES IN ENVIRONMENTAL-ANALYSIS [J].
ESTEBAN, M ;
CASASSAS, E .
TRAC-TRENDS IN ANALYTICAL CHEMISTRY, 1994, 13 (03) :110-117