ASTM D3989-81a(1994)e1

Standard Test Method for Total Rare Earth Metals in Paint Driers by EDTA Method

SCOPE
1.1 This test method covers the titrimetric determination of rare earth metals in liquid rare earth metal driers and utilizes the disodium salt of ethylenediaminetetraacetic acid dihydrate (EDTA).  
1.2 This test method is limited to the determination of the rare earth metal content of a liquid rare earth metal drier that does not contain other drier elements. The method is not applicable to drier blends.  
1.3 This test method has been tested in concentrations of 6% cerium and 6% rare earth metals, but there is no reason to believe that it is not suitable for higher or lower drier metal concentrations provided specimen size is adjusted accordingly.
1.4 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

• Status: Historical
• Publication Date: 09-Jan-2001
• ICS: 87.060.99 - Other paint ingredients
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.21 - Chemical Analysis of Paints and Paint Materials

Relations

• Replaced By: ASTM D3989-01 - Standard Test Method for Total Rare Earth Metals in Paint Driers by EDTA Method
• Effective Date: 10-Jan-2001
• Referred By: ASTM D564-87(2023) - Standard Test Methods for Liquid Paint Driers
• Effective Date: 10-Jan-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
e1
Designation: D 3989 – 81a (Reapproved 1994)
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Total Rare Earth Metals in Paint Driers by EDTA Method
This standard is issued under the fixed designation D 3989; 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 (e) indicates an editorial change since the last revision or reapproval.
e NOTE—Keywords were added editorially in May 1994.
1. Scope 5. Interferences
1.1 This test method covers the titrimetric determination of 5.1 Calcium does not interfere at low pH.
rare earth metals in liquid rare earth metal driers and utilizes 5.2 All other cations that can be titrated with EDTA in acidic
the disodium salt of ethylenediaminetetraacetic acid dihydrate media will interfere and must not be present in the drier.
(EDTA).
6. Reagents
1.2 This test method is limited to the determination of the
rare earth metal content of a liquid rare earth metal drier that 6.1 Purity of Reagents—Reagent grade chemicals shall be
does not contain other drier elements. The method is not used in all tests. Unless otherwise indicated, it is intended that
all reagents shall conform to the specifications of the Commit-
applicable to drier blends.
1.3 This test method has been tested in concentrations of tee on Analytical Reagents of the American Chemical Society,
where such specifications are available. Other grades may be
6 % cerium and 6 % rare earth metals, but there is no reason to
believe that it is not suitable for higher or lower drier metal used, provided it is first ascertained that the reagent is of
sufficiently high purity to permit its use without lessening the
concentrations provided specimen size is adjusted accordingly.
1.4 This standard does not purport to address all of the accuracy of the determination.
6.2 Purity of Water—Unless otherwise indicated, reference
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- to water shall be understood to mean reagent water conforming
to Type II of Specification D 1193.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. 6.3 Ammonium Chloride—Ammonium Hydroxide Buffer
Solution—Add 350 mL of concentrated ammonium hydroxide
2. Referenced Documents
(NH OH) to 54 g of ammonium chloride (NH Cl), and dilute
4 4
2.1 ASTM Standards: to 1 L with water.
D 600 Specification for Liquid Paint Driers 6.4 Ammonium Hydroxide (NH OH), (1+1).
D 1193 Specification for Reagent Water 6.5 Ascorbic Acid.
E 180 Practice for Determining the Precision of ASTM 6.6 Eriochrome Black T Indicator—Mix and grind thor-
Methods for Analysis and Testing of Industrial Chemicals oughly in a mortar a mixture of 0.2 g of Eriochrome Black T
E 300 Practice for Sampling Industrial Chemicals and 100 g of sodium chloride. Store the mixture in a tightly
stoppered bottle where it is stable indefinitely.
3. Summary of Test Method
6.7 EDTA, Standard Solution (0.01 M)—Weigh about 3.73
3.1 A diluted solution of the drier is complexed with an
g of disodium salt of ethylenediaminetetraacetic acid dihydrate
excess of EDTA, the pH adjusted to 5.0, and then titrated with to the nearest 0.01 g, dissolve in water, and dilute to approxi-
zinc chloride solution to a xylenol orange end point.
mately 1 L in a glass-stoppered bottle.
6.8 Hydrochloric Acid (HCL), (1+1).
4. Significance and Use
6.9 Isopropyl Alcohol (99.5 %).
4.1 This test method may be used to confirm the stated
6.10 Sodium Acetate-Acetic Acid Buffer Solution—Dissolve
content of a pure, liquid rare earth metal drier manufactured for
82 g of sodium acetate in water and dilute to 1 L. Adjust pH to
use in the coatings industry.
5.0 with glacial acetic acid using a pH meter.
6.11 Xylenol Orange Indicator—Dissolve 0.2 g in 100 mL
This test method is under the jurisdiction of ASTM Committee D-1 on Paint
and Related Coatings, Materials, and Applications and is the direct responsibility of
Reagent Chemicals, American Chemical Society Specifications, American
Subcommittee D01.21 on Chemical Analysis of Paint and Paint Materials.
Current edition approved Oct. 30, 1981. Published January 1982. Originally Chemical Society, Washington, DC. For suggestions on the testing of reagents not
published as D 3989 – 81. Last previous edition D 3989 – 81. listed by the American Chemical Society, see Analar Standards for Laboratory
Annual Book of ASTM Standards, Vol 06.04. Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
Annual Book of ASTM Standards, Vol 11.01. and National Formulary, U.S. Pharmaceutical Convention, Inc. (USPC), Rockville,
Annual Book of ASTM Standards, Vol 15.05. MD.
D 3989
of water. Prepare fresh daily as required. tube stoppered to prevent solvent evaporation.
6.12 Zinc Chloride Solution, Standard (0.01 M)—Weigh
9.2 Place a few grams of the drier in a 50-mL Erlenmeyer
about 0.65 g of zinc ribbon (Note 1) to the nearest 5 mg on a
flask fitted with a cork, through which passes a dropping tube
glazed paper. Transfer to a 1-L volumetric flask and add 25 mL
and a rubber bulb (or medicine dropper) and obtain the total
of dilute hydrochloric acid (1 + 3). Warm if necessary on a
weight. Into a 400-mL beaker weigh by difference to the
steam bath to dissolve the material complete
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