Surface Characterization of Phenylpropanolamine Drug by Inverse Gas Chromatography

Table 3

Dispersive surface free energy, 𝛾^𝑑_𝑆, of PPA surface in the temperature range 318.15–333.15 K.

𝑇/K	318.15 K	323.15 K	328.15 K	333.15 K
𝛾^𝑑𝑆 (mJm^−2)	26.63±3.86	26.01±0.40	21.90±5.25	17.14±4.79