ASTM D2374-05

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D2374–05
Standard Test Method for
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Lead in Paint Driers by EDTA Method
This standard is issued under the fixed designation D2374; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Significance and Use
1.1 This test method covers a titrimetric determination of 4.1 Theamountofleaddrierusedinoxidizing-typecoatings
leadinliquidpaintdriersthatcanbedissolvedinglacialacetic significantly affects their drying properties. This test method
acid and utilizes the disodium salt of ethylenediaminetet- may be used to confirm the stated lead content of pure liquid
raacetic acid dihydrate (EDTA). lead drier soluble in glacial acetic acid and manufactured for
1.2 This test method is not applicable to drier blends. If use by the coatings industry.
driers other than cobalt are present, they may interfere by
5. Apparatus
reacting with EDTA under the conditions used for analysis.
5.1 Centrifuge, capable of developing 1000 to 2000 g.
1.3 All cations that can be titrated with EDTA in alkaline
media interfere and must not be present in the sample.
6. Reagents
1.4 The values stated in SI units are to be regarded as the
6.1 Purity of Reagents—Reagent grade chemicals shall be
standard. The values given in parentheses are for information
used in all tests. Unless otherwise indicated, it is intended that
only.
all reagents shall conform to the specifications of the Commit-
1.5 This standard does not purport to address all of the
tee onAnalytical Reagents of theAmerican Chemical Society,
safety concerns, if any, associated with its use. It is the
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where such specifications are available. Other grades may be
responsibility of the user of this standard to establish appro-
used, provided it is first ascertained that the reagent is of
priate safety and health practices and determine the applica-
sufficiently high purity to permit its use without lessening the
bility of regulatory limitations prior to use.
accuracy of the determination.
2. Referenced Documents
6.2 Purity of Water—Unlessotherwiseindicated,references
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2.1 ASTM Standards: towatershallbeunderstoodtomeanreagentwaterconforming
D600 Specification for Liquid Paint Driers to Type II of Specification D1193.
6.3 Ammonium Chloride (NH Cl).
D1193 Specification for Reagent Water
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E180 Practice for Determining the Precision of ASTM 6.4 Ammonium Hydroxide (sp gr 0.90)—Concentrated am-
monium hydroxide (NH OH).
Methods for Analysis and Testing of Industrial and Spe-
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cialty Chemicals 6.5 Buffer Solution (pH 10.0)—Dissolve67.5gofNH Clin
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water, add 570 mL of concentrated NH OH (sp gr 0.90), and
E300 Practice for Sampling Industrial Chemicals
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dilute to 1 L.
3. Summary of Test Method
6.6 Cupric Sulfate, Standard Solution (0.05 M)—Dissolve
3.1 The liquid drier is dissolved in glacial acetic acid, 12.5 g of cupric sulfate pentahydrate (CuSO ·5H O) in water
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diluted with isopropyl alcohol and water, and treated with an and dilute to 1 L.
excess of standard EDTA solution. The excess is titrated with 6.7 Eriochrome Black-T Indicator—Triturate 0.20 g of the
standard cupric sulfate solution using PAN as the metal concentrated dye with 100 g of NaCl and store in a tightly
indicator. stoppered jar. This mixture remains stable for several years.
6.8 EDTA, Standard Solution (0.05 M)—Dissolve 18.62 g
of EDTAin water and dilute to 1 L. Store in a polyethylene or
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This test method is under the jurisdiction of ASTM Committee D01 on Paint
borosilicate glass bottle.
and Related Coatings, Materials, andApplications and is the direct responsibility of
Subcommittee D01.21 on Chemical Analysis of Paints and Paint Materials.
Current edition approved Jan. 1, 2005. Published February 2005. Originally
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approved in 1965. Last previous approved in 1999 as edition D2374–85(1999). Reagent Chemicals, American Chemical Society Specifications, American
DOI: 10.1520/D2374-05. Chemical Society, Washington, DC. For suggestions on the testing of reagents not
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or listed by the American Chemical Society, see Analar Standards for Laboratory
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
Standards volume information, refer to the standard’s Document Summary page on and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,
the ASTM website. MD.
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