Excipients GBP-NIN GBP-DDQ GBP-TCNE GBP-MO GBP-PA % Recovery Pyrrolidone 99.31 100.26 101.62 99.14 99.41 Lactose 100.34 101.60 100.45 99.36 99.73 Talc 99.00 99.08 99.12 101.14 99.01 Magnesium stearate 99.43 99.48 99.40 100.37 100.23 Starch 100.69 99.96 99.49 99.48 99.84

Table 4: Recovery of ibuprofen in presence of different excipients.