Surface Deposition and Coalescence and Coacervation Phase Separation Methods: In Vitro Study and Compatibility Analysis of Eudragit RS30D, Eudragit RL30D, and Carbopol-PLA Loaded Metronidazole Microspheres

Table 3

Functional group detection using wave number.

Functional group	Wave number in 1/cm
	Range	Formulation F26	Formulation F28
C-H alkenes	700–610	677.01–630.72	678.94–630.72
C-CI	735–702	723.31	717.52
C-N (bend)	1000–750	987.55–756.1	989.48–825.53
C-O (bend)	1300–1000	1294.24–1002.98	1290.38 –1033.85
C-N	1350–1000	1340.53–1002.98	1340.53–1033.85
N=O	1550–1350	1467.83–1357.89	1533.41–1354.03
-CHO	1720–1740
Aliphatic; C-H (stretch)	3100–2850	3099.61–2854.65	3099.61–2852
O-H	3400–3200	3375.43–3213.41	3213.41