Potentiometric stripping analysis and the speciation of heavy metals in environmental studies

Labar, C.

doi:10.1016/0013-4686(93)85037-y

Cited by 9 publications

(1 citation statement)

References 13 publications

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“…This SCP mode, as compared to CCSCP, appears to be more problematic, but it has also potential advantages: it is available in practically all commercial potentiostats and is less sensitive to the interference of dissolved oxygen. Although acceptable results had already been obtained in quite simple systems using the widespread oxidant Hg(II) [13], our main challenge is to find a suitable chemical oxidant that does not modify metal speciation in a significant way. This is why Hg(II) or the less popular Fe(III) or Ce(IV) [14,15] have not been considered (Hg-, Fe-and Ceions can displace the analyzed metal from their complexes).…”

Section: Introductionmentioning

confidence: 99%

Suitability of Stripping Chronopotentiometry for Heavy Metal Speciation Using Hydrogen Peroxide as Oxidant: Application to the Cd(II)-EDTA-PMA System

et al. 2005

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The possibilities of stripping chronopotentiometry (SCP) for heavy metal speciation have been tested in the modality of chemical oxidation using the model systems Cd(II)-polyacrylic acid (PMA), Cd(II)-EDTA and Cd(II)-PMA-EDTA. The use of 0.03% H 2 O 2 as a chemical oxidant provides reliable results from transition times, but peak potentials are dramatically affected by the presence of this reagent. The study suggests that chemical-oxidation SCP can be a technique complementary to other stripping modalities in the study of inert and macromolecular labile metal complexes.

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Section: Introductionmentioning

confidence: 99%

Suitability of Stripping Chronopotentiometry for Heavy Metal Speciation Using Hydrogen Peroxide as Oxidant: Application to the Cd(II)-EDTA-PMA System

et al. 2005

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The determination of copper at thin film electrodes by constant current stripping potentiometry

Bradshaw

Scollary

1997

Electroanalysis

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A comparison of the determination of copper by constant cunrent stripping potentiometry (CCSP) at mercury and gold films has been carried out. The preferred solution conditions for the mercury film study were determined to be 0.1M ammonium acetate at pH 4.5 and 0.1M HCl for the gold film study. The influence of chloride on the stripping signal was investigated and it was found that for the mercury film conditions, well-formed stripping signals could be obtained up to a chloride concentration of 0.5 M which permitted the ready determination of copper in seawater. With the gold film, high chloride concentrations affected both the film stability and the glassy carbon surface and repeatable results were difficult to obtain. The optimized CCSP methods were applied to various aqueous samples including tap water, seawater, TCLP (acetic acid) extracts as well as TCLP extracts using groundwater and ocean water. Based on the results obtained for these various matrices, it was concluded that there are several advantages favoring the mercury film. The interference from organic components in the sample matrix on the general applicability of CCSP for the determination of copper at either a mercury or gold film is discussed.

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Potentiometric stripping analysis and anodic stripping voltammetry for measurement of copper(II) and lead(II) complexation by fulvic acid: A comparative study

Town

1997

Electroanalysis

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The utility of potentiometric stripping analysis (PSA) for studying the interaction of fulvic acid with Cu" and Pb" at pH 1.8 and 4.8 was assessed. The impact of fulvic acid on both the deposition and stripping steps was considered. In contrast to results obtained by anodic stripping voltammetry, fulvic acid influenced both these steps in PSA, and to different degrees. Surface active substances have been claimed to have self-compensatory effects in PSA; this work shows that this is not valid for heterogenous natural complexants such as fulvic acid.

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Potentiometric stripping analysis and the speciation of heavy metals in environmental studies

Cited by 9 publications

References 13 publications

Suitability of Stripping Chronopotentiometry for Heavy Metal Speciation Using Hydrogen Peroxide as Oxidant: Application to the Cd(II)-EDTA-PMA System

Suitability of Stripping Chronopotentiometry for Heavy Metal Speciation Using Hydrogen Peroxide as Oxidant: Application to the Cd(II)-EDTA-PMA System

The determination of copper at thin film electrodes by constant current stripping potentiometry

Potentiometric stripping analysis and anodic stripping voltammetry for measurement of copper(II) and lead(II) complexation by fulvic acid: A comparative study

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