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Table 1 Shifts in band assignments for the cellulosic reference samples as detected by the application of FTIR at different modes

From: The application of FTIR microspectroscopy in a non-invasive and non-destructive way to the study and conservation of mineralised excavated textiles

Band assignment Wavenumber (cm−1) FTIR-ATR, literature Wavenumber (cm−1) FTIR transmission Wavenumber (cm−1) FTIR reflectance
ν(C–H) bond, indicative of polysaccharides 2900 2900 2900
ν(C=O) ester (only in hemp and sparto) 1735 1735 1752
Indicative of adsorbed water within the fibre 1635 1635 1635
ν(C=C) aromatic in-plane, indicative of lignin (only in hemp and sparto) 1595 1595 1586
δ(C–H) bond in cellulose 1365 1365 1365
δ(CH2) bond in cellulose 1335 1335 1335
ν(C–C) ring breathing, indicative of polysaccharides in cellulose 1155 1155 1173
ν(C–O–C) glycosidic ether band, indicative of polysaccharides in cellulose 1105 1124 1124
ν(C–OH) bond in cellulose 1025 1041 1041
ν(C–O–C) bond in cellulose 895 892 889