ASTM D4278-02

Standard Practice for Wet Ashing Procedure for Preparing Wood Samples for Inorganic Chemical Analysis (Withdrawn 2006)

SCOPE
1.1 This practice consists of a procedure for decomposition of wood as an initial step for analysis for the constituents arsenic, chromium, copper, phosphate, and zinc, all of which may then be analyzed in accordance with Test Methods D 1326, D 1627, D 1628 and D 5584.
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 7.
WITHDRAWN RATIONALE
This practice consists of a procedure for decomposition of wood as an initial step for analysis for the constituents arsenic, chromium, copper, phosphate, and zinc.
Formerly under the jurisdiction of Committee D07 on Wood, this practice was withdrawn without replacement in July 2006.

General Information

• Status: Withdrawn
• Publication Date: 09-Sep-2002
• Withdrawal Date: 11-Jul-2006
• ICS: 79.040 - Wood, sawlogs and sawn timber
• Technical Committee: D07 - Wood
• Drafting Committee: D07.06 - Treatments for Wood Products

Relations

• Replaces: ASTM D4278-95 - Standard Test Method for Wet Ashing Procedure for Preparing Wood Samples for Inorganic Chemical Analysis
• Effective Date: 10-Sep-2002

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the latest information.
Designation:D4278–02
Standard Practice for
Wet Ashing Procedure for Preparing Wood Samples for
1
Inorganic Chemical Analysis
This standard is issued under the fixed designation D 4278; 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 solutions in the absence of organic matter. This practice
provides a means for the preparation of a dilute aqueous
1.1 This practice consists of a procedure for decomposition
solution of the inorganic materials which are in wood by
of wood as an initial step for analysis for the constituents
simultaneouslydecomposingthewoodsampleandsolubilizing
arsenic, chromium, copper, phosphate, and zinc, all of which
the inorganic materials. The aqueous solution may then be
may then be analyzed in accordance with Test Methods
analyzedforitsinorganicconstituentsbyapplicableASTMtest
D 1326, D 1627, D 1628 and D 5584.
methods.
1.2 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5. Apparatus
responsibility of the user of this standard to establish appro-
5.1 For each digestion to be run simultaneously, the follow-
priate safety and health practices and determine the applica-
ing apparatus is required:
bility of regulatory limitations prior to use. Specific precau-
5.1.1 Kjeldahl Flask, 800 mL, with 24/40 ground glass top.
tionary statements are given in Section 7.
5.1.2 Ground Glass Stopper, 24/40.
2. Referenced Documents 5.1.3 Kjeldahl Flask Heater, rheostat-controlled.
3
5.1.4 Tubing, ⁄8-in. TFE-fluorocarbon.
2.1 ASTM Standards:
5.1.5 Glass Beads.
D 1326 Methods for Chemical Analysis of Ammoniacal
2
5.2 For each group of digestions, the following apparatus is
Copper Arsenate
required:
D 1627 Methods for Chemical Analysis of Acid Copper
3
2
5.2.1 Tube Connectors, Y-form, glass, ⁄8-in.
Chromate
5.2.2 Aspirator, TFE-fluorocarbon.
D 1628 Test Methods for Chemical Analysis of Chromated
2
5.3 The apparatus is assembled as shown schematically in
Copper Arsenate
Fig.1.Uptosixsamplescanbehandledwithasingleaspirator.
D 5584 Test Methods for Chemical Analysis of Ammonia-
2
During digestion, clamps may be used on the tubing to balance
cal Copper Quat, Type B (ACQ-B)
the rate of aspiration between flasks. It may occasionally be
1
3. Summary of Test Method
necessary to enlarge the aspirator hole to about ⁄16 in. to
optimize aspiration, either because of extraneous plastic in a
3.1 A small (up to 5 g) sample of chopped or ground wood
new aspirator, or because of build-up during use.
(usually treated) is oxidized and solubilized by an initial
5.4 A syringe is also required for the introduction of acid
digestion in hot concentrated nitric acid. This is followed by
during digestion. Care should be taken to keep the bulb free of
further digestion after the addition of a solution of aqueous
acid oxidant and the syringe should be rinsed after use.
perchloric acid in concentrated sulfuric acid. The cooled
5.5 Grinding Mill.
solution of metal salts is then diluted and is suitable for
analysis by the appropriate method.
6. Reagents
4. Significance and Use
6.1 Nitric Acid, concentrated (sp gr 1.42).
6.2 Sulfuric Acid, concentrated (sp gr 1.84).
4.1 Manywoodpreservativesconsistofinorganicmaterials.
6.3 Perchloric Acid,70%.
Thesematerialsareoftenpreferablyanalyzedindiluteaqueous
6.4 Acid Oxidant—Add 185 volumes of perchloric acid
(70 %) to 100 volumes of distilled water and then add slowly
1
This test method is under the jurisdiction of ASTM Committee D07 on Wood
with mixing 270 volumes of concentrated sulfuric acid.
and is the direct responsibility of Subcommittee D07.06 on Wood Preservatives.
Current edition approved Sept. 10, 2002. Published November 2002. Originally
published as D 4278 – 83. Last previous edition D 4278 – 95.
2
Annual Book of ASTM Standards, Vol 04.10.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the latest information.
D4278–02
FIG. 1 Schematic Sketch of Setup of Digestion Apparatus
7. Safety Precautions or ceramic tray; not in contact with wood or plastic. Do not
increase the amounts in the procedure.
7.1 Although several thousand wood analyses have been
7.5 Clean up all spills with large volumes of water. Do not
carried out by this method without accident, the improper or
use sawdust, rags, or other organic material to mop up acid.
careless use of per
...