ASTM D3989-01(2019)e1
(Test Method)Standard Test Method for Total Rare Earth Metals in Paint Driers by EDTA Method
Standard Test Method for Total Rare Earth Metals 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 rare earth metal drier manufactured for use in the coatings industry.
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 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.5 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.
1.6 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.
´1
Designation: D3989 − 01 (Reapproved 2019)
Standard Test Method for
Total Rare Earth Metals in Paint Driers by EDTA Method
This standard is issued under the fixed designation D3989; 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.
ε NOTE—Footnote 4 title updated to current edition in October 2019.
1. Scope D1193Specification for Reagent Water
E180Practice for Determining the Precision of ASTM
1.1 This test method covers the titrimetric determination of
Methods for Analysis and Testing of Industrial and Spe-
rare earth metals in liquid rare earth metal driers and utilizes
cialty Chemicals (Withdrawn 2009)
the disodium salt of ethylenediaminetetraacetic acid dihydrate
E300Practice for Sampling Industrial Chemicals
(EDTA).
1.2 This test method is limited to the determination of the
3. Summary of Test Method
rare earth metal content of a liquid rare earth metal drier that
3.1 A diluted solution of the drier is complexed with an
does not contain other drier elements. The method is not
excess of EDTA, the pH adjusted to 5.0, and then titrated with
applicable to drier blends.
zinc chloride solution to a xylenol orange end point.
1.3 This test method has been tested in concentrations of
4. Significance and Use
6%ceriumand6%rareearthmetals,butthereisnoreasonto
believe that it is not suitable for higher or lower drier metal
4.1 This test method may be used to confirm the stated
concentrations provided specimen size is adjusted accordingly.
contentofapure,liquidrareearthmetaldriermanufacturedfor
use in the coatings industry.
1.4 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
5. Interferences
only.
5.1 Calcium does not interfere at low pH.
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5.2 AllothercationsthatcanbetitratedwithEDTAinacidic
responsibility of the user of this standard to establish appro-
media will interfere and must not be present in the drier.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
6. Reagents
1.6 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 onAnalytical Reagents of theAmerican Chemical Society,
mendations issued by the World Trade Organization Technical 4
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
D600Specification for Liquid Paint Driers
towatershallbeunderstoodtomeanreagentwaterconforming
to Type II of Specification D1193.
This test method is under the jurisdiction of ASTM Committee D01 on Paint
andRelatedCoatings,Materials,andApplicationsandisthedirectresponsibilityof
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 Oct. 1, 2019. Published October 2019. Originally www.astm.org.
approved in 1981. Last previous edition approved in 2012 as D3989–01 (2012). ACS Reagent Chemicals, Specifications and Procedures for Reagents and
DOI: 10.1520/D3989-01R19E01. 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 theAmerican 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
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D3989 − 01 (2019)
6.3 Ammonium Chloride—Ammonium Hydroxide Buffer
S = grams of zinc used, and
Solution—Add 350 mL of concentrated ammonium hydroxide
65.37 = grams of zinc per litre to producea1M solution.
(NH OH) to 54 g of ammonium chloride (NH Cl), and dilute
4 4
8.2 EDTA Solution, Standard (0.01 M)—Transfer 40.00 mL
to 1 L with water.
of this solution from a buret into a 250-mL assay beaker or
6.4 Ammonium Hydroxide (NH OH), (1+1).
4 wide-mouth flask. Add 50 mL of isopropyl alcohol, 10 mL of
ammoniumchloride-ammoniumhydroxidebuffersolution,and
6.5 Ascorbic Acid.
about 0.2 g of Eriochrome BlackTindicator mixture (Note 3).
6.6 Eriochrome Black T Indicator—Mix and grind thor-
Mix thoroughly by swirling. Titrate with the standard ZnCl
oughly in a mortar a mixture of 0.2 g of Eriochrome Black T
solution to the first permanent appearance of a red color.
and 100 g of sodium chloride. Store the mixture in a tightly
NOTE 3—If the end point is overstepped, add 1.0 mL of the EDTA
stoppered bottle where it is stable indefinitely.
solutiontothemixtureandtitrateagainwithstandardZnCl solution.Use
6.7 EDTA, Standard Solution (0.01 M)—Weighabout3.73g
total volume of each solution for the calculation.
of disodium salt of ethylenediaminetetraacetic acid dihydrate
8.2.1 Calculate the molarity, M , of the EDTA solution as
to the nearest 0.01 g, dissolve in water, and dilute to approxi-
follows:
mately 1 L in a glass-stoppered bottle.
M 5 V M /V (2)
2 1 1 2
6.8 Hydrochloric Acid (HCL), (1+1).
where:
...
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