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Antimony film electrode for electrochemical stripping analysis.
Anal Chem. 2007 Nov 15; 79(22):8639-43.AC

Abstract

In this work, an antimony film electrode (SbFE) is reported for the first time as a possible alternative for electrochemical stripping analysis of trace heavy metals. The SbFE was prepared in situ on a glassy carbon substrate electrode and employed in combination with either anodic stripping voltammetry or stripping chronopotentiometry in nondeaerated solutions of 0.01 M hydrochloric acid (pH 2). Several key operational parameters influencing the electroanalytical response of SbFE were examined and optimized, such as deposition potential, deposition time, and composition of the measurement solution. The SbFE exhibited well-defined and separated stripping signals for both model metal ions, Cd(II) and Pb(II), surrounded with low background contribution and a relatively large negative potential range. The electrode revealed good linear behavior in the examined concentration range from 20 to 140 microg L-1 for both test metal ions, with a limit of detection (3sigma) of 0.7 microg L-1 for Cd(II) and 0.9 microg L-1 for Pb(II) obtained after a 120 s deposition step, and good reproducibility, with a relative standard deviation (RSD) of +/-3.6% for Cd(II) and +/-6.2% for Pb(II) (60 microg L-1, n = 12). When comparing the SbFE with the commonly used mercury film electrode and recently introduced bismuth film electrode, the newly proposed electrode offers a remarkable performance in more acidic solutions (pH < or = 2), which can be advantageous in electrochemical analysis of trace heavy metals, hence contributing to the wider applicability of electrochemical stripping techniques in connection with "mercury-free" electrodes.

Authors+Show Affiliations

Analytical Chemistry Laboratory, National Institute of Chemistry, P.O. Box 660, SI-1001 Ljubljana, Slovenia. samo.hocevar@ki.siNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17949057

Citation

Hocevar, Samo B., et al. "Antimony Film Electrode for Electrochemical Stripping Analysis." Analytical Chemistry, vol. 79, no. 22, 2007, pp. 8639-43.
Hocevar SB, Svancara I, Ogorevc B, et al. Antimony film electrode for electrochemical stripping analysis. Anal Chem. 2007;79(22):8639-43.
Hocevar, S. B., Svancara, I., Ogorevc, B., & Vytras, K. (2007). Antimony film electrode for electrochemical stripping analysis. Analytical Chemistry, 79(22), 8639-43.
Hocevar SB, et al. Antimony Film Electrode for Electrochemical Stripping Analysis. Anal Chem. 2007 Nov 15;79(22):8639-43. PubMed PMID: 17949057.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Antimony film electrode for electrochemical stripping analysis. AU - Hocevar,Samo B, AU - Svancara,Ivan, AU - Ogorevc,Bozidar, AU - Vytras,Karel, Y1 - 2007/10/20/ PY - 2007/10/24/pubmed PY - 2007/10/24/medline PY - 2007/10/24/entrez SP - 8639 EP - 43 JF - Analytical chemistry JO - Anal Chem VL - 79 IS - 22 N2 - In this work, an antimony film electrode (SbFE) is reported for the first time as a possible alternative for electrochemical stripping analysis of trace heavy metals. The SbFE was prepared in situ on a glassy carbon substrate electrode and employed in combination with either anodic stripping voltammetry or stripping chronopotentiometry in nondeaerated solutions of 0.01 M hydrochloric acid (pH 2). Several key operational parameters influencing the electroanalytical response of SbFE were examined and optimized, such as deposition potential, deposition time, and composition of the measurement solution. The SbFE exhibited well-defined and separated stripping signals for both model metal ions, Cd(II) and Pb(II), surrounded with low background contribution and a relatively large negative potential range. The electrode revealed good linear behavior in the examined concentration range from 20 to 140 microg L-1 for both test metal ions, with a limit of detection (3sigma) of 0.7 microg L-1 for Cd(II) and 0.9 microg L-1 for Pb(II) obtained after a 120 s deposition step, and good reproducibility, with a relative standard deviation (RSD) of +/-3.6% for Cd(II) and +/-6.2% for Pb(II) (60 microg L-1, n = 12). When comparing the SbFE with the commonly used mercury film electrode and recently introduced bismuth film electrode, the newly proposed electrode offers a remarkable performance in more acidic solutions (pH < or = 2), which can be advantageous in electrochemical analysis of trace heavy metals, hence contributing to the wider applicability of electrochemical stripping techniques in connection with "mercury-free" electrodes. SN - 0003-2700 UR - https://www.unboundmedicine.com/medline/citation/17949057/Antimony_film_electrode_for_electrochemical_stripping_analysis_ L2 - https://doi.org/10.1021/ac070478m DB - PRIME DP - Unbound Medicine ER -
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