Electrolytical microcell for on-line preconcentration of trace metals in flow systems |
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Authors: | E. Beinrohr |
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Affiliation: | (1) Department of Analytical Chemistry, Slovak Technical University, Radlinského 9, CS-812 37 Bratislava, Czechoslovakia |
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Abstract: | Summary The separation of trace metals from solutions of electrolytes by electrodeposition in a 30 l 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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