Research Article
Design and Characterization of Double Layered Mucoadhesive System Containing Bisphosphonate Derivative
Table 5
IR spectral studies.
| Sample | Wave number (cm−1) | Observation |
| Chitosan | 2840–3000 | C–H stretch | 1830–1870 | C=O | 3350–3310 | N–H stretch | 3420–3590 | O–H stretch | 1020–1275 | C–O–C |
| HPMC-4 KM | 3570–3200 | O–H stretching | 2980–2950 | Aliphatic C–H stretching |
| Risedronate sodium | 3080–3010 | Aromatic C-H stretch | 1600–1430 | C=C and C=N stretch | 3610–3330 | O-H stretch | 1150 | Aliphatic P=O Stretch | 1190 | Aromatic P=O stretch |
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