ASTM D3988-05(2023)
(Test Method)Standard Test Method for Vanadium in Paint Driers by EDTA Method
Standard Test Method for Vanadium in Paint Driers by EDTA Method
SIGNIFICANCE AND USE
4.1 This test method may be used to confirm the stated content of a pure liquid vanadium drier manufactured for use by the coatings industry.
SCOPE
1.1 This test method covers the titrimetric determination of vanadium in liquid vanadium driers and utilizes the disodium salt of ethylenediaminetetraacetic acid dihydrate (EDTA).
1.2 This test method is limited to the determination of the vanadium content of a liquid vanadium drier that does not contain other drier elements. This test method is not applicable to drier blends.
1.3 All cations that can be titrated with EDTA in alkaline media interfere and must not be present in the sample.
1.4 This test method has been tested for concentrations of 3 % and 4 % vanadium, but there is no reason to believe that it is not suitable for higher or lower vanadium concentrations provided specimen size is adjusted proportionately.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D3988 − 05 (Reapproved 2023)
Standard Test Method for
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 D600 Specification for Liquid Paint Driers (Withdrawn
2021)
1.1 This test method covers the titrimetric determination of
D1193 Specification for Reagent Water
vanadium in liquid vanadium driers and utilizes the disodium
E180 Practice for Determining the Precision of ASTM
salt of ethylenediaminetetraacetic acid dihydrate (EDTA).
Methods for Analysis and Testing of Industrial and Spe-
1.2 This test method is limited to the determination of the
cialty Chemicals (Withdrawn 2009)
vanadium content of a liquid vanadium drier that does not
E300 Practice for Sampling Industrial Chemicals
contain other drier elements. This test method is not applicable
3. Summary of Test Method
to drier blends.
3.1 The amount of vanadium drier used in oxidizing-type
1.3 All cations that can be titrated with EDTA in alkaline
coatings significantly affects their drying properties. The vana-
media interfere and must not be present in the sample.
dium drier is acidified and heated to make the vanadium
1.4 This test method has been tested for concentrations of
available for chelation with EDTA. It is then chelated, the pH
3 % and 4 % vanadium, but there is no reason to believe that it
adjusted, and the excess titrated with zinc chloride solution,
is not suitable for higher or lower vanadium concentrations
using Eriochrome Black T as the indicator.
provided specimen size is adjusted proportionately.
4. Significance and Use
1.5 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this 4.1 This test method may be used to confirm the stated
standard.
content of a pure liquid vanadium drier manufactured for use
by the coatings industry.
1.6 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5. Apparatus
responsibility of the user of this standard to establish appro-
5.1 Centrifuge, capable of developing 1000 g to 2000 g.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
6. Reagents
1.7 This international standard was developed in accor-
6.1 Purity of Reagents—Reagent grade chemicals shall be
dance with internationally recognized principles on standard-
used in all tests. Unless otherwise indicated, it is intended that
ization established in the Decision on Principles for the
all reagents shall conform to the specifications of the Commit-
Development of International Standards, Guides and Recom-
tee on Analytical Reagents of the American Chemical Society,
mendations issued by the World Trade Organization Technical
where such specifications are available. Other grades may be
Barriers to Trade (TBT) Committee.
used, provided it is first ascertained that the reagent is of
sufficiently high purity to permit its use without lessening the
2. Referenced Documents
accuracy of the determination.
2.1 ASTM Standards:
6.2 Purity of Water—Unless otherwise indicated, reference
to water shall be understood to mean reagent water conforming
to Type II of Specification D1193.
This test method is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.21 on Chemical Analysis of Paints and Paint Materials. The last approved version of this historical standard is referenced on
Current edition approved June 1, 2023. Published June 2023. Originally www.astm.org.
approved in 1981. Last previous edition approved in 2017 as D3988 – 05 (2017). ACS Reagent Chemicals, Specifications and Procedures for Reagents and
DOI: 10.1520/D3988-05R23. Standard-Grade Reference Materials, American Chemical Society, Washington,
For referenced ASTM standards, visit the ASTM website, www.astm.org, or DC. For suggestions on the testing of reagents not listed by the American Chemical
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Society, see Analar Standards for Laboratory Chemicals, BDH Ltd., Poole, Dorset,
Standards volume information, refer to the standard’s Document Summary page on U.K., and the United States Pharmacopeia and National Formulary, U.S. Pharma-
the ASTM website. copeial Convention, Inc. (USPC), Rockville, MD.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D3988 − 05 (2023)
solution to the mixture and titrate again with standard ZnCl solution. Use
6.3 Ammonium Hydroxide (sp gr 0.90)—Concentrated am-
total volume of each solution for the calculation.
monium hydroxide (NH OH).
8.2.1 Calculate the molarity of the EDTA solution, M , as
6.4 Ascorbic Acid.
follows:
6.5 Buffer Solution—Add 350 mL of concentrated NH OH
M 5 V M /V (2)
2 1 1 2
to 54 g of ammonium chloride and dilute to 1 L with water.
where:
6.6 Eriochrome Black T Indicator—Mix and grind thor-
V = volume of ZnCl solution, mL,
oughly in a mortar a mixture of 0.2 g of Eriochrome Black T
1 2
M = molarity of ZnCl solution, and
and 100 g of sodium chloride. Store the mixture in a tightly 1 2
V = volume of EDTA solution, mL.
stoppered bottle where it is stable indefinitely. 2
6.7 EDTA, Standard Solution (0.01 M)—Weigh about 3.73 g
9. Procedure
of EDTA to the nearest 0.01 g, dissolve in water, and dilute to
9.1 Check the clarity of the drier. If not clear, centrifuge a
approximately 1 L in a glass-stoppered bottle.
portion of the sample until it is clear, keeping the centrifuge
6.8 Hydrochloric Acid (sp gr 1.19)—Concentrated hydro-
tube stoppered to prevent solvent evaporation.
chloric acid (HCl).
9.2 Place a few grams of the drier in a 50 mL Erlenmeyer
6.9 Isopropyl Alcohol, 99.5 %.
flask fitted with a cork through which passes a dropping tube
and rubber bulb (or eye dropper) and obtain the total weight.
6.10 Zinc Chloride, Standard Solution (ZnCl ) (0.01 M)—
Weigh by difference to 0.5 mg two or three 0.18 g to 0.22 g
Weigh about 0.65 g of zinc (Note 1) to 5 mg. Transfer to a 1 L
specimens into 250 mL wide-mouth fl
...
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