Abstract
Very little data are available on the stability constants of metal ion complexes of sparingly soluble salts. Normal methods of obtaining these data cannot be applied to most of these systems because the concentration of metal ion or ligand or both remaining in solution after precipitation is insufficient to detect complex formation. The recent extensive development of ion-selective electrodes has provided a means of accurately detecting very low concentrations of ions and offers the possibility of examining complex formation occurring below the level of precipitation. In this work the possible use of ion-selective electrodes for this purpose has been investigated and results are reported on the lead (II)-fluoride system using a fluoride ion selective electrode. The system was also investigated polarographically and the results obtained are in good agreement.
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