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Parameter Optimizations for Square-Wave Anodic Stripping Voltammetry for Cadmium Detection Using Boron-Doped Diamond Electrodes with Different Doping Levels

Published online by Cambridge University Press:  23 January 2017

André F. Sardinha ,
Lilian M. Silva  and
Neidenêi G. Ferreira
André F. Sardinha
Affiliation:
Associated Laboratory of Sensors and Materials, National Institute for Space Research, São José dos Campos, SP, 12227-010, Brazil. Federal University of São Paulo, São José dos Camos, SP, 12247-014, Brazil.
Lilian M. Silva*
Affiliation:
Associated Laboratory of Sensors and Materials, National Institute for Space Research, São José dos Campos, SP, 12227-010, Brazil.
Neidenêi G. Ferreira
Affiliation:
Associated Laboratory of Sensors and Materials, National Institute for Space Research, São José dos Campos, SP, 12227-010, Brazil.
*
*(Email: [email protected])
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Abstract

The parameter optimizations of square-wave anodic stripping voltammetry using boron doped diamond (BDD) electrodes with different doping levels for cadmium detection were studied. The optimized relation among the peak current with the pulse frequency, the amplitude, and the potential increment for highly (1019 cm-3) and heavily BDD (1021 cm-3) electrodes was considered. The peak currents were measured around -0.75 V vs. Ag/AgCl for Cd2+ concentration ranged from 1 to 20 ppb. Both BDD films provided detection limits lower than 5 ppb showing that these electrodes are suitable to use in a mercury-free method to determine cadmium trace levels in water.

Keywords

diamondCdchemical vapor deposition (CVD) (deposition)
Type
Articles
Information
MRS Advances , Volume 2 , Issue 41: Electronics, Magnetics and Photonics , 2017 , pp. 2223 - 2228
Copyright
Copyright © Materials Research Society 2017 

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