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- W2067207910 abstract "Abstract Thin (5–15 μm) Polyvinylchloride membranes were cast from THF or cyclohexanone and characterized by infrared spectroscopy, micrometry and differential scanning calorimetry. The membranes were used in a diffusion cell whose donor compartment contained an organic salt and an electrode. The receptor compartment was a specially adapted UV cuvette used to measure, in situ, the amount of the organic ion that was transported electrochemically. This cuvette usually held aqueous 0.1 M sodium chloride and a second electrode. Using 4.0 M NaSal, the cathode in the donor compartment, and constant current pulses, which were typically 50 seconds in duration, the ionic flux was directly proportional to the current (0.1–0.5 mA). The efficiency (molecules Sal − /election) was 22%. There was no Sal − flux when no current was passed or when the direction of current flow was reversed. The cations dimethyldopaminium and methyl viologen were similarly transported when the anode was in the donor compartment. Current/voltage curves were recorded. When voltages of the magnitude used for the transport experiment (30 V) were applied, the membrane resistance was substantially lower than at low applied voltages. Measurement of efficiency and membrane resistance were made when plasticizers and salts (Me 4 NSal, LiClO 4 ) were added to the films, when the thickness and area of the film were changed and when solution compositions and concentrations were changed. It was determined that the membranes were weakly selective, and that the selectivity and resistance were not dependent, or very weakly dependent, on additives to the membrane. Sal − salts added to the membrane were not iontophoresed out. Comparison to a transport model from the literature is made." @default.
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- W2067207910 date "1990-12-01" @default.
- W2067207910 modified "2023-09-25" @default.
- W2067207910 title "Electrochemical transport of organic ions through Polyvinylchloride" @default.
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- W2067207910 doi "https://doi.org/10.1016/0022-0728(90)87239-g" @default.
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