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ASTM D3624-85a(2010)

(Test Method)

Standard Test Method for Low Concentrations of Mercury in Paint by Atomic Absorption Spectroscopy

Standard Test Method for Low Concentrations of Mercury in Paint by Atomic Absorption Spectroscopy

SIGNIFICANCE AND USE
The permissible level of heavy metals in certain coatings is specified by governmental regulatory agencies. This test method provides a fully documented procedure for determining low concentrations of mercury present in both water and solvent-reducible coatings to determine compliance.
SCOPE
1.1 This test method covers the determination of the content of mercury in the range between 10 and 1000 ppm (mg/kg) present in liquid coatings, coatings vehicles, or in dried films obtained from previously coated substrates. There is no reason to believe that higher levels could not be determined by this test method, provided that appropriate dilutions and adjustments in specimen size and reagent quantities are made.
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 hazard statements are given in Section 7 and 9.1.1.

General Information

Status
Historical
Publication Date
31-May-2010
ICS
87.040 - Paints and varnishes
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.21 - Chemical Analysis of Paints and Paint Materials
Current Stage
Ref Project

Relations

Replaces
ASTM D3624-85a(2005) - Standard Test Method for Low Concentrations of Mercury in Paint by Atomic Absorption Spectroscopy
Effective Date
01-Jun-2010

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ASTM D3624-85a(2010) - Standard Test Method for Low Concentrations of Mercury in Paint by Atomic Absorption SpectroscopyASTM D3624-85a(2010) - Standard Test Method for Low Concentrations of Mercury in Paint by Atomic Absorption Spectroscopy
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ASTM D3624-85a(2010) - Standard Test Method for Low Concentrations of Mercury in Paint by Atomic Absorption Spectroscopy
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D3624 − 85a(Reapproved 2010)
Standard Test Method for
Low Concentrations of Mercury in Paint by Atomic
1
Absorption Spectroscopy
This standard is issued under the fixed designation D3624; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope methodprovidesafullydocumentedprocedurefordetermining
low concentrations of mercury present in both water and
1.1 This test method covers the determination of the content
solvent-reducible coatings to determine compliance.
of mercury in the range between 10 and 1000 ppm (mg/kg)
present in liquid coatings, coatings vehicles, or in dried films
5. Apparatus
obtained from previously coated substrates. There is no reason
to believe that higher levels could not be determined by this
5.1 Atomic Absorption Spectrophotometer—Any commer-
test method, provided that appropriate dilutions and adjust-
cial instrument having an open sample presentation area in
ments in specimen size and reagent quantities are made.
which to mount the absorption cell or an instrument designed
1.2 This standard does not purport to address all of the
specifically for the measurement of mercury using the cold
safety concerns, if any, associated with its use. It is the
vapor technique.
responsibility of the user of this standard to establish appro-
5.2 Recorder,0to10mV.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. Specific hazard
5.3 Mercury Source Lamp.
statements are given in Section 7 and 9.1.1.
5.4 Absorption Cell—Standard spectrophotometer cells 100
2. Referenced Documents
mm long, having quartz end windows may be used. Prior to
2
2.1 ASTM Standards: use, the cell must be positioned in the optical path of the
D1193 Specification for Reagent Water
spectrophotometer and held in place by suitable clamps or
straps. The cell should be carefully aligned both vertically and
3. Summary of Test Method
horizontally to give the maximum transmittance.
3.1 The sample of liquid coating or dried film is weighed
5.5 Reduction Vessel—Cylindrical gas washing bottle, 250-
into a polytetrafluoroethylene (PTFE)-lined acid decomposi-
mL, equipped with a coarse (40 to 60-µm) fritted glass inlet
tion vessel and digested at an elevated temperature using
tube and a standard-taper glass stopper. Polyethylene or poly-
sulfuric and nitric acids. Use of a sealed acid decomposition
(vinyl chloride) tubing may be used for connecting the reduc-
vessel prevents loss of mercury during the digestion. The
tion vessel to the absorption cell.
digested sample is diluted to a known volume with water and
the concentration of mercury is determined using a cold-vapor,
5.6 Flowmeter, capable of measuring a gas flow of 1 L/min.
atomic absorption technique.
5.7 Drying Tube—Approximately 150 by 20-mm (6 by
4. Significance and Use
3
⁄4-in.) glass tube filled with magnesium perchlorate. The tube
4.1 The permissible level of heavy metals in certain coat-
should be filled each day that it is in use, and the Mg(ClO )
4 2
ingsisspecifiedbygovernmentalregulatoryagencies.Thistest
should be replaced whenever it becomes saturated (carefully
observe after each analysis).
1
This test method is under the jurisdiction of ASTM Committee D01 on Paint
NOTE 1—Use of an indicator desiccant at the exit end of the tube will
and Related Coatings, Materials, andApplications and is the direct responsibility of
make this observation easier.
Subcommittee D01.21 on Chemical Analysis of Paints and Paint Materials.
Current edition approved June 1, 2010. Published June 2010. Originally
5.8 Water Vapor Trap—A second 250-mL gas washing
approved in 1977. Last previous edition approved in 2005 as D3624 – 85a (2005).
DOI: 10.1520/D3624-85AR10.
bottle (the same as used for the reduction vessel). If preferred,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
a 250-mL Erlenmeyer vacuum flask fitted with a one-hole
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
stopper and 200 mm of 5-mm outside diameter glass tubing,
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. may be substituted. (Fig. 1)
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D3624 − 85a (2010)
FIG. 1 Apparatus
5.9 Mercury Trap—A 250-mL Erlenmeyer vacuum flask 6.4 Mercury Solution, Stock (1 mg/mL)—Dissolve 0.1354 g
containing 75 mL of 10
...

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