Microencapsulation of Ruellia tuberosa L. Aqueous Root Extracts Using Chitosan-Sodium Tripolyphosphate and Their In Vitro Biological Activities

Table 2

Assignment of the FTIR spectra.

Peak number	Assignment for R. tuberosa L. extract [31, 32]	Assignment for microcapsules of R. tuberosa L. extract [31–33]
1	3408.75 cm^−1 for O-H alcohol	3246.2 cm^−1 for O-H alcohol
2	2963.22 cm^−1 for C-H aliphatic	1556.55 cm^−1 for C=C aromatics
3	1588.07 cm^−1 for C=C aromatics	1415.75 cm^−1 for C-H alkanes
4	1414.49 cm^−1 for C-C aromatics	1207.44 cm^−1 for N-H amines; 1118.71 cm^−1 for P=O
5	1096.25 cm^−1 for C-O-C ether