ASTM D1105-96

Standard Test Method for Preparation of Extractive-Free Wood

SCOPE
1.1 This method covers the preparation of extractive-free wood and is applicable to all North American woods. Extractives in wood consist of materials that are soluble in neutral solvents and that are not a part of the wood.  
1.2  This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 4.2.

General Information

• Status: Historical
• Publication Date: 09-Apr-1996
• Technical Committee: D07 - Wood
• Drafting Committee: D07.01 - Fundamental Test Methods and Properties

Relations

• Replaced By: ASTM D1105-96(2001) - Standard Test Method for Preparation of Extractive-Free Wood
• Effective Date: 10-Sep-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 1105 – 96 Technical Association of Pulp and Paper Industry
Standard Method T 12 os-75
Standard Test Method for
Preparation of Extractive-Free Wood
This standard is issued under the fixed designation D 1105; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4.2 Ethanol-Toluene Mixture—Mix 1.0 absolute ethanol and
427 mL toluene.
1.1 This test method covers the preparation of extractive-
free wood and is applicable to all North American woods.
NOTE 1—Caution: Avoid inhalation of vapors and contact with skin.
Extractives in wood consist of materials that are soluble in
5. Sample
neutral solvents and that are not a part of the wood.
1.2 This standard does not purport to address all of the
5.1 The sample shall consist of air-dry sawdust that has
safety concerns, if any, associated with its use. It is the
been reduced by means of a Wiley mill so as to pass through
responsibility of the user oi this standard to establish appro-
a 250-μm sieve and be retained on a 180-μm sieve.
priate safety and health practices and determine the applica-
6. Procedure
bility of regulatory limitations prior to use. Specific precau-
tionary statements are given in Section 4.2.1. 6.1 Place a suitable quantity of the sample in the extraction
thimble, being certain that the wood does not extend above the
2. Significance and Use
level of the top of the siphon tube. Extract for 4 h with
2.1 Extractives are materials soluble in neutral solvents.
ethanol-toluene mixture in the Soxhlet extraction apparatus.
They are not generally considered part of the wood polymer
Transfer the wood to a Büchner funnel, remove the excess
structure. These materials should be removed before any
solvent with suction, and wash the thimble and wood with
chemical analysis of the wood. Ethanol-benzene extracts
alcohol to remove the toluene. Return the wood to the extractor
waxes, fats, some resins, and portions of wood gums. Hot
and continue the extraction with ethanol for 4 h, or longer if
water extracts tannins, gums, sugars, starches, and coloring
necessary, until the ethanol siphons over colorless.
matter.
6.2 If the thimble is nearly full, a Gooch crucible of suitable
size may be placed in the rim of the thimble to keep the sample
3. Apparatus
together. Extraction with each solvent should be carried out at
3.1 Soxhlet Extraction Apparatus—A glass Soxhlet extrac-
a rate of not less than four siphonings per hour. Remove the
tion apparatus of suitable size for containing the sample, and
wood from the thimble, spread it out in a thin layer, and allow
fritted-glass or Alundum extraction thimbles of medium to
it to dry in the air until free of alcohol. Tra
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