Volumetric and acoustic studies of cefazolin sodium and ceftriaxone sodium in aqueous ionic liquid, 1-octyl-3-methylimidazolium bromide at T= 298.15 K

The density (d) and speed of sound (u) for systems containing{cefazolin sodium+ ionic liquid (1-octyl-3-methyl imidazolium bromide, [OMIm] Br) + H2O} and {ceftriaxone sodium+ ionic liquid (1-octyl-3-methyl imidazolium bromide, [OMIm] Br) + H2O}have been measured at T = 298.15 K.The measured data have been applied to calculate,standardpartial molar volume( ),apparent molar isentropic compressibility (Kφ), transfer volume (∆_tr V_φ^0), transfer compressibility (∆_tr K_φ^0)and hydration number (nH), and used to discussvarious solute-solvent interactions. The transfer quantities are positive and increase with molalities of ionic liquid which indicate the dominance of hydrophilic-hydrophilic interactions between the ionic liquid and drugs molecules and dehydration effect of ionic liquid on the solutions.