Voltammetry — Cathodic Stripping.

Achterberg, Eric P. , Gledhill, Martha and Zhu, Kechen (2018) Voltammetry — Cathodic Stripping. In: Reference Module in Chemistry, Molecular Sciences and Chemical Engineering. , ed. by Reedijk, J.. Elsevier, Waltham, MA. DOI 10.1016/B978-0-12-409547-2.00553-9.

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Abstract

Cathodic stripping voltammetry (CSV) is an analytical technique used for the analysis of low levels of analytes (principally trace metals and sulfur containing organic compounds) in aqueous solutions, and is based on the measurement of a reductive current response as a function of a potential scan toward more negative potentials. The technique is highly sensitive (limits of detection of 10− 10–10− 12 mol L− 1) because of the application of a preconcentrations step prior to the stripping step. During the preconcentration the analyte is collected on the surface of the working electrode (typically a mercury drop), often in the presence of an added electro-active ligand. The CSV technique has been used for automated measurements of trace metals in marine waters, but a key strength of CSV is in its use in trace metal speciation measurements in natural waters, in particular dissolved iron in marine waters. Recently, iron ligand observations have been made extensively in the global oceans.

Document Type: Book chapter
Keywords: Automated metal analysis, Cathodic stripping voltammetry, GEOTRACES, Iron speciation, Iodide analysis, Ligand titrations, Marine waters, Mercury drop electrode, Natural waters, Stripping voltammetry, Sulfide analysis, Thiol analysis, Trace metal speciation, Trace metals
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-CH Chemical Oceanography
DOI etc.: 10.1016/B978-0-12-409547-2.00553-9
Date Deposited: 17 Jan 2019 08:09
Last Modified: 29 Jan 2020 10:03
URI: http://oceanrep.geomar.de/id/eprint/45408

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