Similarity of Salt Influences on the pH of Buffers, Polyelectrolytes, and Proteins

DOI to cite this document:: 10.5283/epub.24

Voinescu, Alina ; Bauduin, Pierre ; Pinna, M. Cristina ; Touraud, Didier ; Ninham, Barry W.

; Kunz, Werner

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Date of publication of this fulltext: 05 Aug 2009 13:21

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Abstract

Changes in pH induced by the addition of electrolytes to buffers, polyelectrolytes (a polycarboxy polymethylene and a polyethyleneimine), and proteins (casein, whey, and lysozyme) solutions are explored systematically. The two buffer systems are triethanolamine/triethanolammonium chloride and citric acid/sodium citrate. These are chosen because of the similarity of their acid-base equilibria with ...