Figure 2.

Fit of Flory–Huggins–Donnan–Langmuir (FRDL) model Equations (3)–(4) to fructose data in Figure 1a.

Fixed Parameters	Fitted Parameters: 95% CI
${\mathsf{\sigma }}_0$ = 0.553 mol/cm3	χ = 0.61 ± 0.01
${\mathsf{\phi }}_0$ = 0.242	${\mathsf{\rho }}_0$ = 7.26 ± 1.29 mmol/cm3
Csalt = 0.155 mol/L	pKa = 8.20 ± 0.10
	KS = 0.09 mmol/L