Surface Characterization of Phenylpropanolamine Drug by Inverse Gas Chromatography

Table 2

The values of RT ln𝑉_𝑁 (kJ/mol) for the n-alkanes and polar solutes on PPA drug in the temperature range 318.15–333.15 K.

Solute	318.15 K	323.15 K	328.15 K	333.15 K
n-Hexane	2.01	2.77	1.94	1.77
n-Heptane	3.62	4.3	2.92	2.47
n-Octane	6.88	6.9	4.07	2.99
n-Nonane	8.70	9.24	8.16	6.68
DCM	2.78	2.87	2.05	1.77
TCM	4.18	4.12	3.09	2.74
AC	2.2	2.87	2.16	1.91
THF	4.13	4.06	2.67	2.35
EA	4.39	3.28	2.48	2.24