Use of rapid a.c. polarography for the evaluation of complexes of sparingly soluble salts. Application to lead(II)-fluoride and lead(II)-chloride-fluouide systems

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Abstract

Rapid a.c. polarographic methods possess certain advantages in studies of complex ions of sparingly soluble systems involving reversible electrode processes. The sparingly soluble lead(II)-fluoride system, studied previously, was re-examined in detail by the rapid a.c. method; excellent agreement was obtained with earlier values. The mixed complex system lead(II)/3-chloride/3-fluoride was then evaluated. The complex PbClF was detected and a stability constant of 525 was obtained at an ionic strength of 1.0 and 25°. The general need for eliminating oxygen in a.c. polarography is discussed.

Original languageEnglish
Pages (from-to)159-167
Number of pages9
JournalAnalytica Chimica Acta
Volume53
Issue number1
DOIs
Publication statusPublished - Jan 1971
Externally publishedYes

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