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Acidity scales in aqueous 50 weight methanol

E. Kozáková and B. Cséfalvayová

Fac. Nat. Sci., Komensky-Univ., Bratislava

 

Abstract: Buffers and stds. in aq. 50 wt.% MeOH were measured on the working pH* scale using various potentiometric bridged cells. The calibration of a std. cell vs. pH* stds. prepd. in the mixed solvent was compared with the calibration vs. pH std. in water. The values extd. from the working pH* scales were compared with pH* values obtained from the concn. acidity scale. The most accurate results of acidity measurements can be obtained from the working pH* scale of a cell, the ref. electrode of which is sepd. from the soln. under investigation by a salt bridge prepd. in the resp. solvent. The std. cell can be calibrated using a pH* std. in the same solvent.

Full paper in Portable Document Format: 345a610.pdf (in German)

 

Chemical Papers 34 (5) 610–617 (1980)

Thursday, October 21, 2021

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