Decay detection in wood

Details Decay detection in wood Decay detection in wood

1991-05-20

1993-09-14

Housel, James C.

Chemistry: analytical and immunological testing

Nuclear magnetic resonance, electron spin resonance or other...

436 63, 436153, 422 681, 422 78, 422 80, 422 8202, 250282, 250287, 250288, E01N 3346

Patent

active

052448142

ABSTRACT:
The presence of decay is determined in wood by testing a sample. The wood tested may be standing timber, cut timber or when coated in building structures. The testing occurs in very short time intervals so that tests can be carried out on timber in mills and the like. The method of testing includes heating a portion of a wood sample at a temperature in the range of about 220.degree. to 350.degree. C. to evaporate analytes from the wood, conveying the analytes in a sample gas flow into an ionizing chamber of an ion mobility spectrometer detector, ionizing the analytes within the ionizing chamber at a temperature in the range of about 220.degree. to 350.degree. C., generating an ion drift time signature in the detector, and comparing the signature with predetermined signatures representing decay in wood.

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Obst, John R.; "Analytical Pyrolysis of Hardwood and Softwood Digmis and It's Use in Lignin-Type Determination of Hardwood Vessel Elements". J. of Wood Chemistry and Tech. 3(4), pp. 377-397 (1983).
Panstin, A. J. and Zeeuw, Carl de; Textbook of Wood Technology, Third edition, published by McGraw-Hill, pp. 419-421.

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