Analysis of solid wood surfaces by diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy

摘要: Abstract Comparison of infrared spectra wood taken by several methods indicated that the DRIFT spectrum a dispersion powder in KBr, expressed Kubelka-Munk units, agreed best with transmission FTIR solid sections; wood, was close second, while solid-wood absorbance units differed most. The depended to minor extent on grain orientation and choice late- vs early-wood. strongly, however, surface roughness rougher surfaces producing more transmission-like spectra. Depth penetration at 2242 cm-1 (90% loss intensity CN peak polyacrylonitrile placed under sections) varied between 37 138 μm an inverse linear relationship density. spectral analysis chemically treated increase carbonyl functional groups after chlorine or nitrogen dioxide ...