ASTM D3988-05

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D3988–05
Standard Test Method for
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Vanadium in Paint Driers by EDTA Method
This standard is issued under the fixed designation D3988; 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.
1. Scope dium drier is acidified and heated to make the vanadium
available for chelation with EDTA. It is then chelated, the pH
1.1 This test method covers the titrimetric determination of
adjusted, and the excess titrated with zinc chloride solution,
vanadium in liquid vanadium driers and utilizes the disodium
using Eriochrome Black T as the indicator.
salt of ethylenediaminetetraacetic acid dihydrate (EDTA).
1.2 This test method is limited to the determination of the
4. Significance and Use
vanadium content of a liquid vanadium drier that does not
4.1 This test method may be used to confirm the stated
contain other drier elements. This test method is not applicable
content of a pure liquid vanadium drier manufactured for use
to drier blends.
by the coatings industry.
1.3 All cations that can be titrated with EDTA in alkaline
media interfere and must not be present in the sample.
5. Apparatus
1.4 This test method has been tested for concentrations of 3
5.1 Centrifuge, capable of developing 1000 to 2000 g.
and 4 % vanadium, but there is no reason to believe that it is
not suitable for higher or lower vanadium concentrations
6. Reagents
provided specimen size is adjusted proportionately.
6.1 Purity of Reagents—Reagent grade chemicals shall be
1.5 The values stated in SI units are to be regarded as the
used in all tests. Unless otherwise indicated, it is intended that
standard. The values given in parentheses are for information
all reagents shall conform to the specifications of the Commit-
only.
tee onAnalytical Reagents of theAmerican Chemical Society,
1.6 This standard does not purport to address all of the
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where such specifications are available. Other grades may be
safety concerns, if any, associated with its use. It is the
used, provided it is first ascertained that the reagent is of
responsibility of the user of this standard to establish appro-
sufficiently high purity to permit its use without lessening the
priate safety and health practices and determine the applica-
accuracy of the determination.
bility of regulatory limitations prior to use.
6.2 Purity of Water—Unless otherwise indicated, reference
to water shall be understood to mean reagent water conforming
2. Referenced Documents
2 to Type II of Specification D1193.
2.1 ASTM Standards:
6.3 Ammonium Hydroxide (sp gr 0.90)—Concentrated am-
D600 Specification for Liquid Paint Driers
monium hydroxide (NH OH).
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D1193 Specification for Reagent Water
6.4 Ascorbic Acid.
E180 Practice for Determining the Precision of ASTM
6.5 Buffer Solution—Add 350 mL of concentrated NH OH
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Methods for Analysis and Testing of Industrial and Spe-
to 54 g of ammonium chloride and dilute to 1 L with water.
cialty Chemicals
6.6 Eriochrome Black T Indicator—Mix and grind thor-
E300 Practice for Sampling Industrial Chemicals
oughly in a mortar a mixture of 0.2 g of Eriochrome Black T
3. Summary of Test Method and 100 g of sodium chloride. Store the mixture in a tightly
stoppered bottle where it is stable indefinitely.
3.1 The amount of vanadium drier used in oxidizing-type
6.7 EDTA, Standard Solution (0.01 M)—Weigh about 3.73
coatings significantly affects their drying properties. The vana-
g of EDTA to the nearest 0.01 g, dissolve in water, and dilute
to approximately 1 L in a glass-stoppered bottle.
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This test method is under the jurisdiction of ASTM Committee D01 on Paint
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 1981. Last previous edition approved in 1999 as D3988 – 85 (1999). Reagent Chemicals, American Chemical Society Specifications, American
DOI: 10.1520/D3988-05. 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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