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

Heritage Science

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

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