Summary
The separation of trace metals from solutions of electrolytes by electrodeposition in a 30 μl electrolytical flow-through cell was studied. The working electrode of the flow cell was made from powdered spectral or glassy carbon. The electrodeposition is complete for Cu2+, Cd2+, Mn2+ and Pb2+, partial for Zn2+, Fe3+ and Ni2+. Mn2+ and Pb2+ can also be deposited by anodic oxidation on the working electrode. The deposition is complete up to sample flow rates of 3–4 ml/min. The deposited elements are dissolved by short-circuiting the electrodes and flushing the cell with diluted acid. The dissolved elements are determined on-line by flame AAS. Data evaluation through peak area measurement is discussed.
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Beinrohr, E. Electrolytical microcell for on-line preconcentration of trace metals in flow systems. Fresenius J Anal Chem 338, 735–737 (1990). https://doi.org/10.1007/BF00323417
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DOI: https://doi.org/10.1007/BF00323417