Figure 7.

Relationship between the salt concentration and pH for triethanolamine (TEA) buffer and citrate buffer (CA) are shown. The salts used in the study were tetramethylammonium chloride (▷), choline chloride (◇), cesium chloride (○), potassium chloride (▽) sodium chloride (□), and lithium chloride (△). Solid lines are predictions based upon extended Debye–Huckel equation using ionic size parameter 4 × 10^–10 m. Reproduced with permission from ref (85). Copyright 2006 American Chemical Society.