ASTM D1102-84(1995)e1
(Test Method)Standard Test Method for Ash in Wood
Standard Test Method for Ash in Wood
SCOPE
1.1 This test method covers the determination of ash, expressed as the percentage of residue remaining after dry oxidation (oxidation at 580 to 600°C), of wood or wood products.
1.2 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of whoever uses ths standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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e1
Designation: D 1102 – 84 (Reapproved 1995) Modification of
Technical Association of Pulp and Paper Industry
Standard Method T 211 OM-80
Standard Test Method for
Ash in Wood
This standard is issued under the fixed designation D 1102; 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.
e NOTE—Section 8 was added editorially in August 1995.
1. Scope determine the weight of crucible plus specimen, and place in
the drying oven at 100 to 105°C with the crucible cover
1.1 This test method covers the determination of ash,
removed. After 1 h, replace the cover on the crucible, cool in
expressed as the percentage of residue remaining after dry
a desiccator, and weigh. Repeat the drying and weighing until
oxidation (oxidation at 580 to 600°C), of wood or wood
the weight is constant to within 0.1 mg. During the cooling and
products.
weighing periods, keep the crucible covered to prevent absorp-
1.2 This standard does not purport to address all of the
tion of moisture from the air. Record the weight (crucible plus
safety problems, if any, associated with its use. It is the
specimen minus weight of crucible) as the weight of the
responsibility of whoever uses ths standard to consult and
oven-dry test specimen.
establish appropriate safety and health practices and deter-
5.2 Place the crucible and contents, with the cover removed,
mine the applicability of regulatory limitations prior to use.
in the muffle furnace and ignite until all the carbon is
2. Significance and Use eliminated. Heat slowly at the start to avoid flaming and protect
the crucible from strong drafts at all times to avoid mechanical
2.1 The ash content is an approximate measure of the
loss of test specimen. The recommended temperature of final
mineral content and other inorganic matter in wood.
ignition is 580 to 600°C. Avoid heating above this maximum.
3. Apparatus
5.3 Remove the crucible with its contents to a desiccator,
replace the cover loosely, cool, and weigh accurately. Repeat
3.1 Crucibles, with tightly fitting lids, having a capacity of
the heating for 30-min periods until the weight after cooling is
30 mL or more, shall be used. Platinum crucibles are preferred,
constant to within 0.2 mg.
but silica or porcelain crucibles may be used.
3.2 Muffle Furnace—An electric furnace is recommended
6. Calculations and Report
for igniting the wood sample. A furnace fitted with an indicat-
6.1 Calculate the percentage of ash, based on the weight of
ing pyrometer, so that the desired temperature can be main-
the moisture-free wood, as follows:
tained, is preferable.
3.3 Analytical Balance, sensi
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