Figure 4.

Dependence of the mobility of ss26, plotted as a function of binding ion concentration in solutions containing different replacement ion pairs. (A), Li⁺ replacing the tetraalkylammonium ions: (○), TMA⁺; (△), TEA⁺; (◇), TPA⁺; and (□), TBA⁺. (B), TPA⁺ replaced by: (o), Li⁺; (▽), Na⁺; (□), K⁺; (◇), NH₄⁺; and (△), Tris⁺. The total cation concentration was always 300 mM. The straight lines were drawn by linear regression, with correlation coefficients, R² = 0.99.