wavelenght

functional group

plant

3300~3500

N-H in amines and amides

Vetiver
Sunflower

3400~3200

-OH stretch from –COOH and –COH

Vetiver
Sunflower

1600~1650

Aromatic –C=C vibration, -C=O stretch from H-binded conjugated ketones, and –COO- asymmetric stretch1,2

Vetiver
Sunflower

1000~1200

C-O stretch of polysaccharides

Vetiver
Sunflower

1080

Si-O bending

The soil

Table 5: The FTIR analysis results of the soil and the root of sunflower and vetiver