Table 1: N2 adsorption parameters.

Sample (m2/g) (cm3/g) (nm)

SiO2 1 : 44850.401.64
Ketorolac-SiO2 1 : 4260.206.95
SiO2 1 : 85320.261.64
Ketorolac-SiO2 1 : 8950.601.64