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Suitability of Stripping Chronopotentiometry for Heavy Metal Speciation Using Hydrogen Peroxide as Oxidant: Application to the Cd(II)‐EDTA‐PMA System
Abstract: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% H2O2 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.
Keywords:Stripping chronopotentiometry (SCP)  Potentiometric stripping analysis (PSA)  Heavy metal speciation  Oxygen peroxide  Cadmium
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