Vehicle | Asymmetric C-H stretching | Symmetric C-H stretching | Amide I stretching vibration | Amide II bending vibration | ||||
Peak height | % decrease in peak height | Peak height | % decrease in peak height | Peak height | % decrease in peak height | Peak height | % decrease in peak height | |
Untreated | 0.4149 | - | 0.5223 | - | 0.5403 | - | 0.4255 | - |
Ethanol-water 70:30 v/v | 0.2943 | 29.07 | 0.3898 | 25.37 | 0.2546 | 52.88 | 0.2214 | 47.97 |
Mea | 0.1381 | 66.71 | 0.1824 | 65.08 | 0.1245 | 76.96 | 0.1231 | 71.07 |