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Table 2 FTIR absorption peaks and characteristic bonds and biomass component [30, 53, 54]

From: Comparison of steam-assisted versus microwave-assisted treatments for the fractionation of sweet sorghum bagasse

Biomass component

Absorption peak

 

Wavenumber (cm−1)

Characteristic bond and movement

 

Hemicellulose

1737

C=O stretching

1056

C–O stretch

1235

C–O stretch

1375

C–H deformation

Lignin

1636

C=O stretching

1516

Phenyl ring stretching

1218

C–O of guaiacyl ring

1268

C–O of guaiacyl ring

1315

C–O of syringyl ring

1329

Guaiacyl and syringyl condensed

1502–1600

Aromatic skeletal vibration

1235

C–O stretch

Cellulose

1158

C–O–C stretching

900–901

Amorphous cellulose

1033

C–O stretching at C6

1061

C–C stretching

1114

C–O stretching at C3

1056

C–O stretch

1428

Crystalline cellulose