Surface Characterization of Phenylpropanolamine Drug by Inverse Gas Chromatography

Table 1

The properties of the solutes.

Solute	𝑎(𝛾^𝑑𝑙)^0.5×10^−16; cm^2(mJ/cm^2)^0.5	𝑎; (nm^2)	AN*; (kJ/mol)	DN; (kJ/mol)
n-Hexane	2.21	0.515	—	—
n-Heptane	2.57	0.570	—	—
n-Octane	2.91	0.630	—	—
n-Nonane	3.29	0.690	—	—
DCM	1.65	0.315	16.4	0
TCM	2.24	0.440	22.7	0
AC	1.73	0.425	10.5	71.4
EA	1.95	0.480	6.3	71.8
THF	2.13	0.450	2.1	84.4

∗Gutamann parameter.