ASTM D5655-95(2000)

Standard Test Method for Analysis of Copper Dimethyldithiocarbamate (CDDC) Treated Wood by Colorimetry 1 (Withdrawn 2006)

SCOPE
1.1 This test method covers colorimetric analysis of CDDC in treated wood.  
1.2 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are for information only.  
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WITHDRAWN RATIONALE
This test method covers colorimetric analysis of CDDC in treated wood.
Formerly under the jurisdiction of Committee D07 on Wood, this test method was withdrawn without replacement in July 2006.

General Information

• Status: Withdrawn
• Publication Date: 09-Jan-2000
• Withdrawal Date: 11-Jul-2006
• ICS: 71.100.50 - Wood-protecting chemicals
• ICS: 79.020 - Wood technology processes
• Technical Committee: D07 - Wood
• Drafting Committee: D07.06 - Treatments for Wood Products

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D5655–95 (Reapproved 2000)
Standard Test Method for
Analysis of Copper Dimethyldithiocarbamate (CDDC)
Treated Wood by Colorimetry 1
This standard is issued under the fixed designation D 5655; 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. Significance and Use
1.1 This test method covers colorimetric analysis of CDDC 4.1 Copper dimethyldithiocarbamate (CDDC) for use in the
in treated wood. preservative treatment of wood must conform with this test
1.2 The values stated in SI units are to be regarded as the method.
standard. The inch-pound units given in parentheses are for
5. Apparatus
information only.
5.1 Spectrophotometer—Any good spectrophotometer can
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the be used.
5.2 Heated Magnetic Stir Plate.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 5.3 Increment Borer and Grinder—A typical Wiley mill is
suitable to grind samples. The device should be capable of
bility of regulatory limitations prior to use.
reducing the wood to a small particle size (30 mesh).
2. Referenced Documents
5.4 Reflux Apparatus, (Methods D 147, or equivalent).
2.1 ASTM Standards: 5.5 Buchner Vacuum Filter/Flask.
D 147 Methods of Testing Bituminous Mastics, Grouts, and 5.6 Laboratory Glassware, volumetric flasks, pipettes, cu-
Like Mixtures vettes, and other commonly available glassware.
2.2 AWPA Standards: 5.7 Filter Paper, Whatman #42 (sized to fit Buchner
A10 Methods of Analysis of CCA Treating Solutions and Funnel).
CCA Treated Wood by Colorimetry
3 6. Reagents
M2 Method for Sampling Wood
6.1 Chloroform, Spectro Grade CH Cl.
P5-14 Method of Analysis of Copper Dimethyldithiocar-
bamate (CDDC) Treated Wood by Colorimetry 6.2 Copper Dimethyldithiocarbamate, analytical standard
>99 %.
2.3 AOAC International Standard:
Method 972.29 Spectrophotometric Method—Thiram and 6.3 Methyl Alcohol, Spectro Grade CH OH.
6.4 Extraction Azeotrope, 12.6 % MeOH/87.4 % CH Cl
Thiram Residues
(w/w).
3. Summary of Test Method
7. Sampling
3.1 Wood treated with CDDC is ground and extracted with
chloroform/methanol azeotrope. CDDC, a colored compound, 7.1 Sample treated wood as described in Paragraph 5 of
AWPAStandardM 2exceptthattheincrementboringsmustbe
is determined colorimetrically by use of a suitable spectropho-
tometer at a wavelength of 435 nm. oven dried (60°C or less).
8. Preparation of CDDC Standards
This test method is under the jurisdiction of ASTM Committee D-7 on Wood
8.1 Produce a standard curve by dissolving analytical grade
and is the direct responsibility of Subcommittee D07.06 on Treatments for Wood
copper dimethyldithiocarbamate in azeotrope to produce
Products.
Current edition approved Jan. 15, 1995. Published March 1995.
Discontinued; see 1988 Annual Book of ASTM Standards, Vol 04.04.
3 5
Available from the American Wood-Preservers’ Association, P.O. Box 286, Use a visual spectrophotometer, such as Beckman Model, 35, B/L Spectronic
Woodstock, MD 21163. 20, or equivalent.Available from Fisher Scientific, Box 405, Pittsburgh, PA15230;
AvailablefromtheAssociationofOfficialAnalyticalChemists,Suite400,2200 or CMS, P.O. Box 98944, Chicago, IL 60693.
Wilson Blvd., Arlington, VA 22201-3301. Available from Pflatz and Bauer, P. O. Box 3723, New Hyde Park, NY 11040.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D5655
known amounts of CDDC in the range from 0 to 25 ppm. Plot left-hand knob so that the meter needle on the scale reads 0 on
these known, weighed, prepared standards against the absor- the percent transmittance scale. Be sure the reading is stable.
bance measured by the spectrophotometer at a wavelength of Check it periodically throughout the experiment and readjust it
435 nm on standard quadrille graph paper. if necessary.
10.5 Setting the Wavelength—Adjust the wavelength to the
9. Procedure
desired setting of 435 nm. For the Spectronic 20 , adjust the
9.1 When using 20 borings (0.6 in. (15.24 mm)) in length
wavelength using the knob on the top of the instrument.
(approximately 3.2 g of wood) use 200 g of chloroform
10.6 Setting 0 Absorbance (100 % Transmittance)—Turn
azeotrope for extraction.
the right-hand knob of the Spectronic 20 counter-clockwise
9.2 Preparation of Standard Graph for CDDC in Treated
almost to its limit. Insert the test tube cell containing the
Wood:
sample into the cell holder. Match the line on the test tube cell
9.2.1 Place analytical grade CDDC standard in azeotrope in
with the index line on the holder. Close the top of the holder.
dosage range from 3.55 to 21.31 µg/mL CDDC. Read in the
Adjust the right-hand knob clockwise until the meter needle on
spectrophotometer at 435 nm against chloroform/methanol
the scale reads 0 absorbance. Remove the test tube to avoid
azeotrope as the reference. The absorbance found will be 0.08
instrument fatigue. Che
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