Table 1.
FT-IR spectra analysis of dried herbal plant extracts.
| Herbs | Sample code | Absorption spectrum, wavenumber (cm−1) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| 3375–3260 | 2940–2925 | 1785–1640 | 1640–1600 | 1600–1300 | 1450–1050 | 1080–620 | 935–710 | ||
| Pandan | H1 | 3301.78 | 2931.09 | 1756.52 | 1599.01 | 1452.01 | 1237.54 | 774.67 | |
| 1333.02 | 1114.71 | ||||||||
| Stevia | H2 | 3351.2 | 2926.54 | 1717.87 | 1606.33 | 1518.87 | 1306.28 | 1079.71 | |
| 1407.78 | 1281.64 | 925.60 | 814.96 | ||||||
| 897.27 | 779.64 | ||||||||
| Lemongrass | H3 | 3319.53 | 2939.88 | 1145.48 | 926.48 | 828.39 | |||
| Asiatic pennywort | H4 | 3314.97 | 2940.28 | 1624.03 | 1429.08 | 1241.51 | 1082.88 | 773.67 | |
| Jiaogulan | H5 | 3280.13 | 2929.93 | 1587.31 | 1434.92 | 1079.36 | |||
| 1269.84 | |||||||||
| Kariyat | H6 | 3312.38 | 2932.07 | 1734.36 | 1612.44 | 1400.28 | 1110.87 | 826.11 | 766.98 |
| Mulberry leave | H7 | 3291.10 | 1585.83 | 1435.96 | 996.4 | 745.55 | |||
| 1157.43 | 935.91 | ||||||||
| Cat’s whiskers | H8 | 3346.06 | 2938.26 | 1603.68 | 1526.73 | 1272.58 | 1073 | 871.88 | |
| 1411.74 | 1146.35 | 925.08 | 780.43 | ||||||
| Bamboo grass | H9 | 3291.99 | 2933.11 | 1595.13 | 1438.92 | 1082.15 | |||
| Sea holly | H10 | 3318.02 | 2936.3 | 1598.23 | 1425.13 | 1079.36 | 773.67 | ||
| Stonebreaker | H11 | 3304.03 | 1713.45 | 1602.8 | 1396.16 | 1227.28 | Stonebreaker | ||
| Jewel vine | H12 | 3318.74 | 2936.3 | 1609.53 | 1431.74 | 1146.01 | |||
| Safflower | H13 | 3314.74 | 2932.54 | 1600.03 | 1515.55 | 1075.79 | 768.45 | ||
| 1423.98 | |||||||||
| Chrysanthemum | H14 | 3374.35 | 2924.58 | 1733.45 | 1438.13 | 1247.09 | |||
| Roselle | H15 | 3280.23 | 1784.12 | 1415.87 | 1219.94 | 1101.58 | |||
| Butterfly pea | H16 | 3320.10 | 2936.36 | 1606.34 | 1409.53 | 1060.34 | |||
| Beal fruit | H17 | 3328.08 | 2931.62 | 1604.13 | 1518.94 | 1434.55 | 1085.86 | ||
| 1269.15 | 893.32 | ||||||||
| Indian gooseberry | H18 | 3294.73 | 1726.16 | 1609.27 | 1333.02 | 1114.71 | 774.67 | ||
| 1237.54 | |||||||||
| Bitter gourd | H19 | 3261.34 | 1587.3 | 1400.9 | 1107 | ||||
| Siamese senna | H20 | 3313.62 | 1602.87 | 1524.28 | 1270.31 | ||||
| 1412.47 | |||||||||
| Chinese liquorice | H21 | 3330.44 | 2936.5 | 1604.31 | 1515.86 | 1073.02 | 945.76 | 935.91 | |
| 1419.76 | |||||||||
| Alexandria senna | H22 | 3317.81 | 2941.55 | 1596.14 | 1431.37 | 1120.03 | 744.11 | ||
| Ginger | H23 | 3291.36 | 2931.56 | 1638.76 | 1403.96 | 1051.53 | 929.12 | 782.17 | |
| Ginkgo | H24 | 3307.89 | 2936.41 | 1702.13 | 1598.92 | 1250.42 | 768.3 | ||
| 1435.24 | 1111.98 | ||||||||
| Black galingale | H25 | 3334.17 | 2932.54 | 1636.87 | 1515.85 | 1420.00 | 1079.81 | 935.91 | |