Premium
Anodic Stripping Voltammetric Determination of Mercury in Water by Using a New Electrochemical Flow Through Cell
Author(s) -
Richter Pablo,
Toral M. Inés,
Abbott Bernardo
Publication year - 2002
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/1521-4109(200210)14:18<1288::aid-elan1288>3.0.co;2-5
Subject(s) - anodic stripping voltammetry , electrode , anode , detection limit , analyte , analytical chemistry (journal) , repeatability , working electrode , mercury (programming language) , dropping mercury electrode , volumetric flow rate , materials science , electrochemistry , stripping (fiber) , horizontal scan rate , chemistry , chromatography , cyclic voltammetry , composite material , physics , quantum mechanics , computer science , programming language
A flow through electrochemical cell was designed for the implementation of a simple, efficient, rapid and sensitive method for determination of mercury in water samples by anodic stripping voltammetry. A solid gold or a gold film electrode can be used as working electrode in a wall‐jet configuration of the cell. The analyte is electrolyzed on the electrode surface by pumping the liquid sample through a continuous flow manifold at a flow rate of 8 mL/min. Deposition efficiency increased by increasing the velocity at which the sample arrives to the cell. After deposition of the analyte, it was stripped from the electrode by using a linear anodic potential scan at 35 mV/s. Geometric and hydrodynamic variables of the system were studied in order to optimize the analytical response. A detection limit of 0.05 ng/mL was reached by using a preconcentration time of 540 s. The repeatability expressed as relative standard deviation was always less than 3%. The method shows a good selectively and was successfully applied to the determination of mercury in different water samples.