A study of the stripping voltammetric behavior of selected metal chelates and its application to automated analysis of river waters

TJ Maxwell, Franklin Smyth

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    The ASV and AdSV behavior of Zn2+, Cd2+, Pb2+, Cu2+, Ni2+ and Sn4+ in the presence of selected complexing/chelating agents has been studied. The presence of 2,5-dimercapto-1,3,4-thiadiazole (I) lowers the limit of detection (LOD) for the ASV determination of Zn2+, Cd2+ and Pb2+ in 5 x 10(-3) mol dm(-3) LiCl supporting electrolyte with a deposition time of 120 s to 0.82, 0.17 and 0.34 ppb, respectively, due to participation of the adsorbed complexing agent in the overall process. Similarly, Cd2+ can be determined in the presence of benzimidazole sulfoxides (II) and (III) by ASV in Britton-Robinson (BR) buffer pH 9, with 120s deposition with lower LODs of 0.12 and 0.06 ppb, respectively. AdSV can also be used to determine Cd2+ with (II), (III) and ammonium pyrrolidine dithiocarbamate (IV) with LODs of 0.70, 0.64 and 0.20 ppb, respectively and with Zn2+ having an AdSV LOD of 1.09 ppb using adsorption of its chelate with (IV) at -900 mV for 60 s in a supporting electrolyte of 5 x 10(-3) mol dm(-3) LiCl. Participation of the adsorbed complexing agent in the ASV process is also observed for Sn4+ and Cu2+ in an oxalate/ammonium chloride/HCl buffer with lowered LODs of 0.51 ppb and 0.76 ppb in the presence of p-methylene blue (V). The chelating agent 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (VII) can be used to determine Cd2+, Zn2+ and Pb2+ using the AdSV technique down to LODs of 9.3, 2.7 and 6.3 ppb, respectively. Several of these methods have been combined in the development of an automated method for the determination of trace Zn, Cd, Pb and Cu in an artificial river water matrix. The accuracy and precision of this procedure is discussed. Determination of Ni, Sn and As by this automated method and in such a matrix proved to be inaccurate.
    LanguageEnglish
    Pages795-802
    JournalElectroanalysis
    Volume8
    Issue number8-9
    Publication statusPublished - Aug 1996

    Fingerprint

    Chelating Agents
    Electrolytes
    Buffers
    Rivers
    Metals
    Sulfoxides
    Ammonium Chloride
    Water
    Methylene Blue
    Adsorption
    pyrrolidine dithiocarbamic acid
    2,5-dimercapto-1,3,4-thiadiazole
    benzimidazole
    2-(5-bromo-2-pyridylazo)-5-diethylaminophenol

    Cite this

    @article{dc8c6480f7fc47bfbe09cc08cde1331d,
    title = "A study of the stripping voltammetric behavior of selected metal chelates and its application to automated analysis of river waters",
    abstract = "The ASV and AdSV behavior of Zn2+, Cd2+, Pb2+, Cu2+, Ni2+ and Sn4+ in the presence of selected complexing/chelating agents has been studied. The presence of 2,5-dimercapto-1,3,4-thiadiazole (I) lowers the limit of detection (LOD) for the ASV determination of Zn2+, Cd2+ and Pb2+ in 5 x 10(-3) mol dm(-3) LiCl supporting electrolyte with a deposition time of 120 s to 0.82, 0.17 and 0.34 ppb, respectively, due to participation of the adsorbed complexing agent in the overall process. Similarly, Cd2+ can be determined in the presence of benzimidazole sulfoxides (II) and (III) by ASV in Britton-Robinson (BR) buffer pH 9, with 120s deposition with lower LODs of 0.12 and 0.06 ppb, respectively. AdSV can also be used to determine Cd2+ with (II), (III) and ammonium pyrrolidine dithiocarbamate (IV) with LODs of 0.70, 0.64 and 0.20 ppb, respectively and with Zn2+ having an AdSV LOD of 1.09 ppb using adsorption of its chelate with (IV) at -900 mV for 60 s in a supporting electrolyte of 5 x 10(-3) mol dm(-3) LiCl. Participation of the adsorbed complexing agent in the ASV process is also observed for Sn4+ and Cu2+ in an oxalate/ammonium chloride/HCl buffer with lowered LODs of 0.51 ppb and 0.76 ppb in the presence of p-methylene blue (V). The chelating agent 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (VII) can be used to determine Cd2+, Zn2+ and Pb2+ using the AdSV technique down to LODs of 9.3, 2.7 and 6.3 ppb, respectively. Several of these methods have been combined in the development of an automated method for the determination of trace Zn, Cd, Pb and Cu in an artificial river water matrix. The accuracy and precision of this procedure is discussed. Determination of Ni, Sn and As by this automated method and in such a matrix proved to be inaccurate.",
    author = "TJ Maxwell and Franklin Smyth",
    year = "1996",
    month = "8",
    language = "English",
    volume = "8",
    pages = "795--802",
    journal = "Electroanalysis",
    issn = "1040-0397",
    number = "8-9",

    }

    A study of the stripping voltammetric behavior of selected metal chelates and its application to automated analysis of river waters. / Maxwell, TJ; Smyth, Franklin.

    In: Electroanalysis, Vol. 8, No. 8-9, 08.1996, p. 795-802.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - A study of the stripping voltammetric behavior of selected metal chelates and its application to automated analysis of river waters

    AU - Maxwell, TJ

    AU - Smyth, Franklin

    PY - 1996/8

    Y1 - 1996/8

    N2 - The ASV and AdSV behavior of Zn2+, Cd2+, Pb2+, Cu2+, Ni2+ and Sn4+ in the presence of selected complexing/chelating agents has been studied. The presence of 2,5-dimercapto-1,3,4-thiadiazole (I) lowers the limit of detection (LOD) for the ASV determination of Zn2+, Cd2+ and Pb2+ in 5 x 10(-3) mol dm(-3) LiCl supporting electrolyte with a deposition time of 120 s to 0.82, 0.17 and 0.34 ppb, respectively, due to participation of the adsorbed complexing agent in the overall process. Similarly, Cd2+ can be determined in the presence of benzimidazole sulfoxides (II) and (III) by ASV in Britton-Robinson (BR) buffer pH 9, with 120s deposition with lower LODs of 0.12 and 0.06 ppb, respectively. AdSV can also be used to determine Cd2+ with (II), (III) and ammonium pyrrolidine dithiocarbamate (IV) with LODs of 0.70, 0.64 and 0.20 ppb, respectively and with Zn2+ having an AdSV LOD of 1.09 ppb using adsorption of its chelate with (IV) at -900 mV for 60 s in a supporting electrolyte of 5 x 10(-3) mol dm(-3) LiCl. Participation of the adsorbed complexing agent in the ASV process is also observed for Sn4+ and Cu2+ in an oxalate/ammonium chloride/HCl buffer with lowered LODs of 0.51 ppb and 0.76 ppb in the presence of p-methylene blue (V). The chelating agent 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (VII) can be used to determine Cd2+, Zn2+ and Pb2+ using the AdSV technique down to LODs of 9.3, 2.7 and 6.3 ppb, respectively. Several of these methods have been combined in the development of an automated method for the determination of trace Zn, Cd, Pb and Cu in an artificial river water matrix. The accuracy and precision of this procedure is discussed. Determination of Ni, Sn and As by this automated method and in such a matrix proved to be inaccurate.

    AB - The ASV and AdSV behavior of Zn2+, Cd2+, Pb2+, Cu2+, Ni2+ and Sn4+ in the presence of selected complexing/chelating agents has been studied. The presence of 2,5-dimercapto-1,3,4-thiadiazole (I) lowers the limit of detection (LOD) for the ASV determination of Zn2+, Cd2+ and Pb2+ in 5 x 10(-3) mol dm(-3) LiCl supporting electrolyte with a deposition time of 120 s to 0.82, 0.17 and 0.34 ppb, respectively, due to participation of the adsorbed complexing agent in the overall process. Similarly, Cd2+ can be determined in the presence of benzimidazole sulfoxides (II) and (III) by ASV in Britton-Robinson (BR) buffer pH 9, with 120s deposition with lower LODs of 0.12 and 0.06 ppb, respectively. AdSV can also be used to determine Cd2+ with (II), (III) and ammonium pyrrolidine dithiocarbamate (IV) with LODs of 0.70, 0.64 and 0.20 ppb, respectively and with Zn2+ having an AdSV LOD of 1.09 ppb using adsorption of its chelate with (IV) at -900 mV for 60 s in a supporting electrolyte of 5 x 10(-3) mol dm(-3) LiCl. Participation of the adsorbed complexing agent in the ASV process is also observed for Sn4+ and Cu2+ in an oxalate/ammonium chloride/HCl buffer with lowered LODs of 0.51 ppb and 0.76 ppb in the presence of p-methylene blue (V). The chelating agent 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (VII) can be used to determine Cd2+, Zn2+ and Pb2+ using the AdSV technique down to LODs of 9.3, 2.7 and 6.3 ppb, respectively. Several of these methods have been combined in the development of an automated method for the determination of trace Zn, Cd, Pb and Cu in an artificial river water matrix. The accuracy and precision of this procedure is discussed. Determination of Ni, Sn and As by this automated method and in such a matrix proved to be inaccurate.

    M3 - Article

    VL - 8

    SP - 795

    EP - 802

    JO - Electroanalysis

    T2 - Electroanalysis

    JF - Electroanalysis

    SN - 1040-0397

    IS - 8-9

    ER -