J ．　 Fac ．　 Agr． ，　 Kyushu　Univ． ，　 45　（1） ，　 163－169　（2000） Surface Characterization　of　Naturally　Degraded　Wood－Free　Papers by Near　lnfrared　Fourier－Transform　Raman　Spectroscopy

Near infrared excited Fourier－transform Raman spectroscopy （NIR－FTR ） was applied to non－destructive spectroscopic analysis of the naturally degraded papers ． The analytical results reveal that the color of papers was related closely to Raman intensities at 1600 cm一 ’ band that was assigned to lignin and paperrnaking additives in the papers ． The folding endurances of papers correlated with the intensities at 1097cm－i assigned to B－glycosidic 1inkages of ceilulose and hemicellulose and decreased with the increasing storage years ． The Raman spectra of the papers Mustrate that the a－glycosidic linkages at 1126 cm’i of hemicellulose and starch were hydrolyzed faster than B－glycosidic linkages during the storage