Durch elektrisch geladene Ionophore induzierter Ionentransport in Modellmembranen mit Selektivität für Magnesium und Calcium
✍ Scribed by Daniel Erne; Werner E. Morf; Spyridon Arvanitis; Zvjezdana Cimerman; Daniel Ammann; Wilhelm Simon
- Publisher
- John Wiley and Sons
- Year
- 1979
- Tongue
- German
- Weight
- 652 KB
- Volume
- 62
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Different lipophilic β‐diketones have been prepared. Some preferably transport Mg^2+^ and Ca^2+^ through PVC‐based liquid membranes when a pH‐gradient is applied across the membrane. A theoretical model is presented that allows a description of potentiometrically determined ion selectivities as well as transport selectivities obtained under zero current and electrodialytic conditions, respectively. The expectations based on this model are in agreement with the experimental evidence presented. Some membrane systems have potentiality for their application in the measurement of water hardness.