Code Drug amount (mg) EC/HPMC
(w/w)
Temperature (oC) Stirring rate (rpm) Particle size (μm) Yield (%) DEE (%) Buoyancy (%) 12 h Cum. release (%)
F1 300 4:1 25 500 944 ± 7.0 88.2 ± 3.0 98.3 ± 0.9 54.1 ± 4.2 99.8 ± 5.2
F2 700 4:1 25 500 1017 ± 16.8 89.3 ± 2.1 96.5 ± 0.5 64.0 ± 3.5 62.9 ± 0.4
F3 1000 4:1 25 500 1092 ± 14.0 86.2 ± 3.3 93.9 ± 0.8 69.1 ± 1.9 56.2 ± 1.2
F4 300 1:1 25 500 718 ± 2.6 34.0 ± 2.9 86.2 ± 2.4 8.1 ± 1.4 99.9 ± 3.9
F5 300 4:1 25 500 944 ± 7.0 88.2 ± 3.0 98.3 ± 0.9 54.1 ± 4.2 99.8 ± 5.2
F6 300 7:1 25 500 1070 ± 6.7 89.4 ± 3.6 96.0 ± 1.3 61.0 ± 2.3 47.9 ± 2.2
F7 300 9:1 25 500 1090 ± 11.5 91.1 ± 2.2 98.4 ± 1.0 77.8 ± 1.9 41.3 ± 0.5
F8 300 4:1 20 500 924 ± 6.1 95.4 ± 2.9 98.4 ± 1.0 50.0 ± 3.8 100.9± 0.8
F9 300 4:1 25 500 944 ± 7.0 88.2 ± 3.0 98.3 ± 0.9 54.1 ± 4.2 99.8 ± 5.2
F10 300 4:1 30 500 976 ± 8.1 63.1 ± 3.8 86.2 ± 0.6 46.1 ± 1.4 95.6 ± 2.9
F11 300 4:1 25 500 944 ± 7.0 88.2 ± 3.0 98.3 ± 0.9 54.1 ± 4.2 99.8 ± 5.2
F12 300 4:1 25 900 791 ± 15.5 93.3 ± 1.3 97.2 ± 1.1 52.2 ± 2.5 100.9 ± 1.9
F13 300 4:1 25 1200 721 ± 9.5 91.5 ± 4.2 93.2 ± 1.9 49.3 ± 1.5 99.8 ± 3.4
Table 1: Evaluation of physicochemical characterstics of microspheres prepared at various levels of process and formulation variables.