Graphite-epoxy composite as an alternative material to design mercury free working electrodes for stripping voltammetry

被引：32

作者：

Moreno-Baron, L ^{[1
]}

Merkoçi, A ^{[1
]}

Alegret, S ^{[1
]}

机构：

[1] Univ Autonoma Barcelona, Grp Sensors & Biosensors, Dept Quim, Bellaterra 08193, Catalonia, Spain

来源：

ELECTROCHIMICA ACTA | 2003年 / 48卷 / 18期

关键词：

mercury-free electrode; graphite-epoxy composite electrode; anodic stripping voltammetry; lead; copper; cadmium;

D O I：

10.1016/S0013-4686(03)00303-7

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The use of graphite-epoxy composite electrodes (GECE) as an alternative to mercury or modified electrodes for stripping voltammetry is presented. The effect of preconcentration time on the peak current was studied. It is shown, unlike traditional mercury electrodes, that the accumulation of lead using GECE does not yield a saturation current even at high preconcentration times of 30 min. A preconcentration time of 1 min was chosen as a compromise between analysis time and sensitivity. The peak current was increased by decreasing pH, the pH range 1-2 being the most sensitive. Concentrations as low as 1 ppb for lead and copper and 10 ppb for cadmium in standard solutions have been detected. Both analytical results and SEM characterisation confirm the behaviour of GECE as a complex microelectrode array at a rough surface. (C) 2003 Elsevier Science Ltd. All rights reserved.

引用

页码：2599 / 2605

页数：7

共 41 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] Rigid carbon - Polymer biocomposites for electrochemical sensing - A review [J].

Alegret, S .

ANALYST, 1996, 121 (12) :1751-1758

[3]

Alegret S, 1999, QUIM ANAL, V18, P23

[4] Gold electrodes from recordable CDs [J].

Angnes, L ;

Richter, EM ;

Augelli, MA ;

Kume, GH .

ANALYTICAL CHEMISTRY, 2000, 72 (21) :5503-5506

[5] RAPID ANODIC-STRIPPING ANALYSIS WITH ULTRAMICROELECTRODES [J].

BARANSKI, AS .

ANALYTICAL CHEMISTRY, 1987, 59 (04) :662-666

[6] Simultaneous determination of trace amounts of zinc, lead and copper in rum by anodic stripping voltammetry [J].

Barbeira, PJS ;

Stradiotto, NR .

TALANTA, 1997, 44 (02) :185-188

[7] An inexpensive and renewable pencil electrode for use in field-based stripping voltammetry [J].

Bond, AM ;

Mahon, PJ ;

Schiewe, J ;

VicenteBeckett, V .

ANALYTICA CHIMICA ACTA, 1997, 345 (1-3) :67-74

[8] Disposable thick film modified graphite electrodes for stripping voltammetry [J].

Brainina, KZ ;

Ivanova, AV ;

Malakhova, NA .

ANALYTICA CHIMICA ACTA, 1997, 349 (1-3) :85-91

[9] CHARACTERIZATION OF THICK-LAYER GRAPHITE DISPOSABLE VOLTAMMETRIC ELECTRODES [J].

BRAININA, KZ ;

BOND, AM .

ANALYTICAL CHEMISTRY, 1995, 67 (15) :2586-2591

[10] Poly(ester sulphonic acid) coated mercury thin film electrodes: characterization and application in batch injection analysis stripping voltammetry of heavy metal ions [J].

Brett, CMA ;

Fungaro, DA .

TALANTA, 2000, 50 (06) :1223-1231

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