Voltammetric, potentiometric and amperometric studies with a rotated aluminum wire electrode: The R.Al.E. as indicator electrode in potentiometric and amperometric acid-base titrations

✍ Scribed by I.M. Kolthoff; C.J. Sambucetti

• Publisher: Elsevier Science
• Year: 1959
• Tongue: English
• Weight: 894 KB
• Volume: 21
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(59)80157-4

✦ Synopsis

In the first paper of this series 1 it WLS shown that the rotated aluminum clcctrotlc (KA1.E.)

dots not function as a pa c!lcctrodc in acid medium but behaves as a ~OII electrode at a plr greater than about 9. Even tracts of fluoriclc ion depolarize the electrode in acid solutions and tllc elcctrodc potential then becomes consiclcrably more negative than in the absence of fluoride. In or&r to know the limitations of the R.Al.E. as indicator clcctroclc in potcntiomctric acid-base titrations in aqueous medium, both in the abscncc and prcscnce of fluoride in the solution, potential mcnsuremcnts have been made in acid buffer solutions containing Vilrvillg concentrations of fluoride. Morcovcr voltammograms wcrc run and mcasurdmcnts of the stationary potential (zero-current potential) of the electrode were made in buffer solutions of various composition in the pli range between C, and II, both in the presence and absence of fluoride. No ampcrornctric titrations of acids with a strong base llavc been dcscribcd in the litcraturc. Since hydrosyl Referemes p. 165 WIL. 21 (1959) STUDIES WITII r\ ROT.-\TED A~-ELECTRODE 157 'I'AL3LE 1 (continuctl) -.._