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Significance and Use
2.1 Hot alkali extracts low molecular weight carbohydrates consisting mainly of hemicellulose and degraded cellulose in wood. This solubility of wood is an indication of the degree of fungal decay, or degradation by heat, light, oxidation, and so forth. The more decay or degradation, the higher the solubility.
1.1 This test method covers the determination of the solubility of wood in a hot dilute alkali solution. A1 % solution of sodium hydroxide (NaOH) is used. One application is in determining the degree of fungus decay that has taken place in a given wood sample. As the wood decays, the percentage of alkali-soluble material increases in proportion to the decrease in pulp yield caused by the decay.
ICS Number Code 79.040 (Wood, sawlogs and sawn timber)
UNSPSC Code 11121600(Wood)
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ASTM D1109-84(2013), Standard Test Method for 1 % Sodium Hydroxide Solubility of Wood, ASTM International, West Conshohocken, PA, 2013, www.astm.orgBack to Top