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