Using the determined activity coefficient values, the transmembrane osmotic pressure differential was calculated through Eq. 15, which allows for consideration of solvent nonideality, and compared to Van't Hoff predictions of 𝛥𝛱 in Figure . The results show that the simplified Van't Hoff description does indeed yield an overestimate of 𝛥𝛱 by 2 -7% compared to Eq. 15. This is a small but notable discrepancy, such that the correction for solvent nonideality was included in the calculation of osmotic pressure throughout further analysis.