METHOD FOR RAPID IDENTIFICATION OF WOOD SPECIES BY LASER INDUCED PLASMA SPECTROSCOPY

摘要

The method relates to a rapid identification of wood species by laser inducedplasmaspectroscopy. The method is used to identify the wood species of a woodsample,such as a lug, a lumber or any other form of wood that is to be identified.The maybe carried out by an apparatus comprising a pulsed laser beam which is focusedona wood sample to be analyzed. The laser pulse vaporizes a small volume of thesurface of the wood and produces a plasma. The optical emission of the plasmaissubsequently collected and sent to an spectrometer positioned to detect theemissionlines of the elements present in the samples by a multichannel detector, suchas aphotodiode array, a CCD, a CID, a CTD or an array of individual detectors. Theidentification of the wood species is then conducted by comparing the spectralinformation to typical spectral information of various wood species stored inadatabase of a computer. The method allow for rapid, virtually non-destructiveandon-line identification of various species of wood.