From Extraction to Ionometry

摘要

On the basis of existent data we have carried out a comparative analysis of equilibriums of formation and distribution of metal complexes in extraction and ionometry with liquid and plasticized ion-selective electrodes. We have shown that electrode-active compounds are practically identical to compounds formed via extraction, and hence common behavioural patterns and clas-sification of ionometric systems correspond to the patterns found in extraction systems. Distribution processes, which take place in the ion-sensitive membrane, may be considered as being common for bi-phase systems, primarily extrationary, whereby reactions of formation and distribution take place. This approach provides well-grounded explanation for an array of experimentally de-termined facts: for instance association between sensitivity and selectivity of ion-selective electrodes and resistance of complexes, utilized as electrode-active compounds; hydrophobicity of complex and ligands; as well as the nature of the membrane dissolving agent.