Fig. 2

The apparent molar volumes \({V_\varphi }\)(m5 mol−1) of gabapentin versus its molality, m (mol kg−1) in aqueous betaine solutions with varying molalities: ▲, 0.0500; ◆, 0.0300; ▪, 0.0100 at T = 298 K.

The apparent molar volumes \({V_\varphi }\)(m5 mol−1) of gabapentin versus its molality, m (mol kg−1) in aqueous betaine solutions with varying molalities: ▲, 0.0500; ◆, 0.0300; ▪, 0.0100 at T = 298 K.