ASTM D1627-94(2000)
(Test Method)Standard Test Methods for Chemical Analysis of Acid Copper Chromate (Withdrawn 2006)
Standard Test Methods for Chemical Analysis of Acid Copper Chromate (Withdrawn 2006)
SCOPE
1.1 These test methods cover the chemical analysis of solid acid copper chromate and solutions of this material.
1.1.1 Test Method D38 covers the sampling of wood preservatives prior to testing.
1.2 The analytical procedures appear in the following order: Sections Copper (calculated as CuO) 7 to 10 Hexavalent chromium (calculated as CrO ) 11 to 13 pH of solution 14
1.3 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.
WITHDRAWN RATIONALE
These test methods cover the chemical analysis of solid acid copper chromate and solutions of this material.
Formerly under the jurisdiction of Committee D07 on Wood, this specification was withdrawn without replacement in July 2006.
General Information
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D1627–94 (Reapproved 2000)
Standard Test Methods for
Chemical Analysis of Acid Copper Chromate
This standard is issued under the fixed designation D 1627; 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 2.2 Other Standard:
AWPA A2 Standard Methods for Analysis of Waterborne
1.1 These test methods cover the chemical analysis of solid
Preservatives and Fire-Retardant Formulations
acid copper chromate and solutions of this material.
1.1.1 Test Method D 38 covers the sampling of wood
3. Summary of Test Methods
preservatives prior to testing.
3.1 Copper—A measured sample is reacted with Hydro-
1.2 The analytical procedures appear in the following order:
chloric Acid and Potassium Iodide to complex the copper ion.
Sections
The solution is then titrated with a standard solution of Sodium
Copper (calculated as CuO) 7 to 10
Hexavalent chromium (calculated as CrO ) 11to13
Thiosulfate. The Copper is calculated as CuO.
pH of solution 14
3.2 Chromium—A diluted and chemically treated sample is
1.3 This standard does not purport to address all of the reacted with an excess of Ferrous Ammonium Sulfate. The
safety concerns, if any, associated with its use. It is the unreacted Ferrous Ammonium Sulfate is titrated with a stan-
responsibility of the user of this standard to establish appro- dard solution of Potassium Dichromate to determine the
priate safety and health practices and determine the applica- consumed chromium. Hexavalent Chromium is calculated as
bility of regulatory limitations prior to use. CrO .
3.3 pH—The solution is measured for pH with a glass
2. Referenced Documents
electrode.
2.1 ASTM Standards:
4. Significance and Use
D 38 Test Methods for Sampling Wood Preservatives Prior
to Testing 4.1 Acid copper chromate for use in the preservative treat-
D 1003 Test Method for Haze and Luminous Transmittance ment of wood must conform with Specification D 1624.
of Transparent Plastics
5. Purity of Reagents
D 1035 Test Methods for Chemical Analysis of Fluor-
5.1 Purity of Reagents—Reagent grade chemicals shall be
Chrome-Arsenate-Phenol
D 1193 Specification for Reagent Water used in all tests. Unless otherwise indicated, it is intended that
all reagents shall conform to the specifications of the Commit-
D 1326 Methods for Chemical Analysis of Ammoniacal
Copper Arsenate tee onAnalytical Reagents of theAmerican Chemical Society,
2 7
where such specifications are available. Other grades may be
D 1624 Specification for Acid Copper Chromate
D 1628 Test Methods for Chemical Analysis of Chromated used, provided it is first ascertained that the reagent is of
sufficiently high purity to permit its use without lessening the
Copper Arsenate
E 70 Test Method for pH of Aqueous Solutions with the accuracy of the determination.
5.2 PurityofWater—Unless otherwise indicated, references
Glass Electrode
to water shall be understood to mean reagent water conforming
to Specification D 1193.
These test methods are under the jurisdiction of ASTM Committee D-7 on
Wood and are the direct responsibility of Subcommittee D07.06 on Treatments for
6. Sampling
Wood Products.
6.1 When the material to be sampled is a water solution, it
Current edition approved July 15, 1994. Published September 1994. Originally
published as D 1627 – 59. Last previous edition D 1627 – 87. shall be mixed to ensure uniformity and the sample shall be at
The analytical methods and sampling procedures are substantially the same as
those given in the American Wood-Preservers’ Association Standard Methods for
Analysis of Water-Borne Preservatives and Fire-Retardant Formulations (A2 – 84).
Acknowledgment is made to the American Wood-Preservers’ Association for its Available from American Wood-Preservers’ Assn., P.O. Box 286, Woodstock,
development of the subject matter covered in this standard. MD 21163-0286.
2 7
Annual Book of ASTM Standards, Vol 04.10. “Reagent Chemicals,American Chemical Society Specifications,”Am. Chemi-
Annual Book of ASTM Standards, Vol 08.01. cal Soc., Washington, DC. For suggestions on the testing of reagents not listed by
Annual Book of ASTM Standards, Vol 11.01. the American Chemical Society, see “Analar Standards for Laboratory U.K.
Annual Book of ASTM Standards, Vol 15.05. Chemicals,” BDH Ltd., Poole, Dorset, and the “United States Pharmacopeia.”
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D1627
least a pint and preferably a quart. The sample shall be solution and mix thoroughly by rotating the flask with the
representative and taken by a “thief” or other device. The stopper in place. Titrate with the Na ·S O solution, adding 2
2 2 3
sample shall be collected and stored in properly closed
mL of starch solution just before the brownish color of the
containers of glass or other suitable material.
iodine disappears. Stop the titration when the color first
6.2 When the material to be sampled consists of solids, a
changes from deep blue to green. Disregard any reappearance
sample at least 5 lb (2.3 kg) in weight shall be taken from
of the blue color.
various points in the container or containers so that a repre-
7.8.2 Calculate the normality of the thiosulfate solution as
sentative sample is obtained. It shall be kept in an airtight
follows:
container to prevent changes in composition by reason of
Normality 5 2.039/mL of Na S O solution (1)
2 2 3
moisture absorption or loss or chemical action of the air.
6.3 The analytical procedures given in these methods
7.9 StarchIndicatorSolution (10 g/L)—Make a paste of 1 g
specify samples containing between 0.1 and 1.0 g of the
of soluble starch in about 5 mLof water, dilute to 100 mL, and
ingredient to be determined. If the sample is solid, unless it is
boilfor1minwithstirring.Coolandadd1dropofchloroform.
dry and finely pulverized, it is preferable to weigh a larger
This solution is subject to decomposition, and fresh solution
sample than specified and dissolve this in a definite quantity of
should be prepared if a dark blue color is not produced with a
water from which aliquots containing the specified quantity
drop of tincture of iodine in 100 mLwater on addition of a few
may be taken for analysis. Prepared samples or solutions
drops of the starch indicator solution.
having a content of 10 to 20 g of solid preservative equivalent
7.10 Sulfuric Acid (sp gr 1.84)—Concentrated sulfuric acid
per litre are usually convenient. Samples of solution from
(H SO ).
2 4
working tanks or plant equipment shall be filtered at working
temperature immediately on obtaining, and shall not be filtered
8. Procedure for Solid Preservative or New Solutions
at the time the analysis is performed. Should any precipitate or
8.1 Transfer a sample, containing the equivalent of about
solid adhering to the container be present when the sample is
analyzed, the solution and any such precipitate or solid shall be 0.11 g of copper oxide (CuO) to a 300-mL Erlenmeyer flask,
and add 10 mLof water if the sample is in the solid form.Add
thoroughly intermixed before analysis in order
...
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