Table 1.

Evaluation of the theophylline (THP) loading of the IPC and graft copolymers by the near infrared (NIR) method.

Sample	Polymeric Matrix (wt %)	Unknown Compound (wt %)	Drug Loading (%) Raported to Initial THP Amount
IPC 72/28-THP	98.32 ± 4.91	1.68 ± 0.08	42 ± 2.10
C25-THP	98.20 ± 4.90	1.80 ± 0.09	45 ± 2.25
C43-THP	98.47 ± 4.92	1.53 ± 0.07	39 ± 1.95
C68-THP	98.20 ± 4.90	1.80 ± 0.09	45 ± 2.25