Using a segmented voltage sweep mode and a Gaussien curve fitting method to improve heavy metal measurement system performance

• Autorzy: Dias Pereira J. M. , Postolache O. , Silva Girao P.
• Języki publikacji: PL

Abstrakty

EN

This paper presents a voltammetric segmented voltage sweep mode that can be used to identify and measure heavy metals' concentrations. The proposed sweep mode covers a set of voltage ranges that are centered around the redox potentials of the metals that are under analysis. The heavy metal measurement system can take advantage of the historical database of measurements to identify the metals with higher concentrations in a given geographical area, and perform a segmented sweep around predefined voltage ranges or, alternatively, the system can perform a fast linear voltage sweep to identify the voltammetric current peaks and then perform a segmented voltage sweep around the set of voltages that are associated with the voltammetric current peaks. The paper also includes the presentation of two auto-calibration modes that can be used to improve system's reliability and proposes the usage of a Gaussian curve fitting of voltammetric data to identify heavy metals and to evaluate their concentrations. Several simulation and experimental results, that validate the theoretical expectations, are also presented in the paper.

Słowa kluczowe

EN

heavy metals measurement; electrochemical analysis; voltammetry; auto-calibration and curve fitting

• Wydawca: Komitet Metrologii i Aparatury Naukowej PAN
• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2012
• Tom: Vol. 19, nr 2
• Strony: 381--394
• Opis fizyczny: Bibliogr. 34 poz., rys., wykr., wzory

Twórcy

autor

Dias Pereira J. M.

autor

Postolache O.

autor

Silva Girao P.

• Escola Superior de Tecnologia de Setúbal (LabIM), Instituto Politécnico de Setúbal, Rua do Vale de Chaves, Estefanilha, 2910-761 Setúbal, Portugal,

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