ASTM D3988-05(2011)
(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
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 the standard. The values given in parentheses are for information only.
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 and health practices and determine the applicability of regulatory limitations prior to use.
General Information
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D3988 − 05 (Reapproved 2011)
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.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Summary of Test Method
1.1 This test method covers the titrimetric determination of 3.1 The amount of vanadium drier used in oxidizing-type
vanadium in liquid vanadium driers and utilizes the disodium coatings significantly affects their drying properties.The vana-
salt of ethylenediaminetetraacetic acid dihydrate (EDTA). dium drier is acidified and heated to make the vanadium
available for chelation with EDTA. It is then chelated, the pH
1.2 This test method is limited to the determination of the
adjusted, and the excess titrated with zinc chloride solution,
vanadium content of a liquid vanadium drier that does not
using Eriochrome Black T as the indicator.
containotherdrierelements.Thistestmethodisnotapplicable
to drier blends.
4. Significance and Use
1.3 All cations that can be titrated with EDTA in alkaline
4.1 This test method may be used to confirm the stated
media interfere and must not be present in the sample.
content of a pure liquid vanadium drier manufactured for use
1.4 This test method has been tested for concentrations of 3
by the coatings industry.
and 4% vanadium, but there is no reason to believe that it is
5. Apparatus
not suitable for higher or lower vanadium concentrations
provided specimen size is adjusted proportionately.
5.1 Centrifuge, capable of developing 1000 to 2000 g.
1.5 TThe values stated in SI units are to be regarded as
6. Reagents
standard. No other units of measurement are included in this
standard.
6.1 Purity of Reagents—Reagent grade chemicals shall be
used in all tests. Unless otherwise indicated, it is intended that
1.6 This standard does not purport to address all of the
all reagents shall conform to the specifications of the Commit-
safety concerns, if any, associated with its use. It is the
tee onAnalytical Reagents of theAmerican Chemical Society,
responsibility of the user of this standard to establish appro-
where such specifications are available. Other grades may be
priate safety and health practices and determine the applica-
used, provided it is first ascertained that the reagent is of
bility of regulatory limitations prior to use.
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
D600Specification for Liquid Paint Driers
towatershallbeunderstoodtomeanreagentwaterconforming
D1193Specification for Reagent Water
to Type II of Specification D1193.
E180Practice for Determining the Precision of ASTM
6.3 Ammonium Hydroxide (sp gr 0.90)—Concentrated am-
Methods for Analysis and Testing of Industrial and Spe-
monium hydroxide (NH OH).
3 4
cialty Chemicals (Withdrawn 2009)
6.4 Ascorbic Acid.
E300Practice for Sampling Industrial Chemicals
6.5 Buffer Solution—Add 350 mL of concentrated NH OH
to 54 g of ammonium chloride and dilute to 1 L with water.
This test method is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of
6.6 Eriochrome Black T Indicator—Mix and grind thor-
Subcommittee D01.21 on Chemical Analysis of Paints and Paint Materials.
oughly in a mortar a mixture of 0.2 g of Eriochrome Black T
Current edition approved June 1, 2011. Published June 2011. Originally
approved in 1981. Last previous edition approved in 2005 as D3988–05. DOI:
10.1520/D3988-05R11.
2 4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Reagent Chemicals, American Chemical Society Specifications, American
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Chemical Society, Washington, DC. For suggestions on the testing of reagents not
Standards volume information, refer to the standard’s Document Summary page on listed by the American Chemical Society, see Analar Standards for Laboratory
the ASTM website. Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
The last approved version of this historical standard is referenced on and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,
www.astm.org. MD.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D3988 − 05 (2011)
and 100 g of sodium chloride. Store the mixture in a tightly
M = molarity of ZnCl solution, and
1 2
stoppered bottle where it is stable indefinitely.
V = volume of EDTA solution, mL.
6.7 EDTA, Standard Solution(0.01 M)—Weighabout3.73g
9. Procedure
of EDTAto the nearest 0.01 g, dissolve in water, and dilute to
approximately 1 L in a glass-stoppered bottle.
9.1 Check the clarity of the drier. If not clear, centrifuge a
6.8 Hydrochloric Acid (sp gr 1.19)—Concentrated hydro- portion of the sample until it is clear, keeping the centrifuge
chloric acid (HCl).
tube stoppered to prevent solvent evaporation.
6.9 Isopropyl Alcohol, 99.5%.
9.2 Place a few grams of the drier in a 50-mL Erlenmeyer
flask fitted with a cork through which passes a dropping tube
6.10 Zinc Chloride, Standard Solution (ZnCl ) (0.01 M)—
and rubber bulb (or eye dropper) and obtain the total weight.
Weigh about 0.65 g of zinc (Note 1) to 5 mg.Transfer to a 1-L
volumetric flask, and add 25 mL of dilute hydrochloric acid Weigh by difference to 0.5 mg two or three 0.18 to 0.22-g
specimens into 250-mL wide-mouth flasks.
(1+3). Warm if necessary on a steam bath to dissolve the
material completely. Cool, dilute to the mark with water and
NOTE 4—This is the correct specimen weight range for a vanadium
mix thoroughly.
drier containing 3 to 6% of vanadium (16 to 24 mL of standard 0.01 M
ZnCl solution is required for the titration).
NOTE 1—Store the zinc ribbon in a tightly closed container to prevent 2
t
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