ASTM D3804-02(2021)
(Test Method)Standard Test Method for Iron in Paint Driers by EDTA Method
Standard Test Method for Iron in Paint Driers by EDTA Method
SIGNIFICANCE AND USE
4.1 This test method may be used to confirm the stated content of a liquid iron drier soluble in isopropyl alcohol and manufactured for use in the coatings industry. The content determines activity level.
SCOPE
1.1 This test method covers the titrimetric determination of iron in liquid iron driers soluble in isopropyl alcohol and utilizes the disodium salt of ethylenediaminetetraacetic acid dihydrate (EDTA).
1.2 This test method is limited to the determination of the iron content of a liquid drier that does not contain other drier elements. This method is not applicable to drier blends.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 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: D3804 − 02 (Reapproved 2021)
Standard Test Method for
Iron in Paint Driers by EDTA Method
This standard is issued under the fixed designation D3804; 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 liquid iron drier is diluted with isopropyl alcohol
iron in liquid iron driers soluble in isopropyl alcohol and andtheironchelatedwithexcessstandardEDTA.Thesolution
utilizes the disodium salt of ethylenediaminetetraacetic acid is buffered and the excess EDTAis titrated with standard zinc
dihydrate (EDTA). chloride solution to the Eriochrome Black T end point.
1.2 This test method is limited to the determination of the
4. Significance and Use
iron content of a liquid drier that does not contain other drier
elements. This method is not applicable to drier blends. 4.1 This test method may be used to confirm the stated
content of a liquid iron drier soluble in isopropyl alcohol and
1.3 The values stated in SI units are to be regarded as
manufactured for use in the coatings industry. The content
standard. No other units of measurement are included in this
determines activity level.
standard.
1.4 This standard does not purport to address all of the
5. Interferences
safety concerns, if any, associated with its use. It is the
5.1 All cations that can be titrated with EDTA in alkaline
responsibility of the user of this standard to establish appro-
media interfere and must not be present in the sample or must
priate safety, health, and environmental practices and deter-
be masked.
mine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accor-
6. Reagents
dance with internationally recognized principles on standard-
6.1 Purity of Reagents—Reagent grade chemicals shall be
ization established in the Decision on Principles for the
used in all tests. Unless otherwise indicated, it is intended that
Development of International Standards, Guides and Recom-
all reagents shall conform to the specifications of the Commit-
mendations issued by the World Trade Organization Technical
tee onAnalytical Reagents of theAmerican Chemical Society,
Barriers to Trade (TBT) Committee.
where such specifications are available. Other grades may be
2. Referenced Documents
used, provided it is first ascertained that the reagent is of
sufficiently high purity to permit its use without lessening the
2.1 ASTM Standards:
accuracy of the determination.
D600Specification for Liquid Paint Driers (Withdrawn
2021)
6.2 Purity of Water—Unless otherwise indicated, references
D1193Specification for Reagent Water
towatershallbeunderstoodtomeanreagentwaterconforming
E180Practice for Determining the Precision of ASTM
to Type II of Specification D1193.
Methods for Analysis and Testing of Industrial and Spe-
6.3 Ammonium Hydroxide (1+3)—Add 10 mL of concen-
cialty Chemicals (Withdrawn 2009)
trated ammonium hydroxide (NH OH, sp gr 0.90) to 30 mL
E300Practice for Sampling Industrial Chemicals
water.
6.4 Buffer Solution—Add 350 mL of concentrated ammo-
This test method is under the jurisdiction of ASTM Committee D01 on Paint
nium hydroxide (NH OH) to 54 g of ammonium chloride
andRelatedCoatings,Materials,andApplicationsandisthedirectresponsibilityof 4
Subcommittee D01.21 on Chemical Analysis of Paints and Paint Materials. (NH Cl) and dilute to 1 L with water.
Current edition approved Feb. 1, 2021. Published February 2021. Originally
approved in 1979. Last previous edition approved in 2014 as D3804–02 (2014).
DOI: 10.1520/D3804-02R21.
2 4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or ACS Reagent Chemicals, Specifications and Procedures for Reagents and
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standard-Grade Reference Materials, American Chemical Society, Washington,
Standards volume information, refer to the standard’s Document Summary page on DC. For suggestions on the testing of reagents not listed by theAmerican Chemical
the ASTM website. Society, see Analar Standards for Laboratory Chemicals, BDH Ltd., Poole, Dorset,
The last approved version of this historical standard is referenced on U.K., and the United States Pharmacopeia and National Formulary, U.S. Pharma-
www.astm.org. copeial Convention, Inc. (USPC), Rockville, MD.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D3804 − 02 (2021)
6.5 EDTA, Standard Solution (0.01 M)—Weigh to 10 mg
M = molarity of ZnCl solution, and
2 2
about3.73gofthedisodiumsaltofethylenediaminetetraacetic
V = EDTA solution, mL.
acid dihydrate (EDTA), dissolve in water, and dilute to
9. Procedure
approximately 1 L in a polyethylene or borosilicate glass
bottle.
9.1 Check the clarity of the drier. If not clear, centrifuge a
portion of the sample until it is clear, keeping the centrifuge
6.6 Hydrochloric Acid (1+3)—Add 3 mL of concentrated
tube stoppered to prevent solvent evaporation.
hydrochloric acid (HCl, sp gr 1.19) to 9 mL of water.
9.2 Place a few grams of the drier in a 50-mL Erlenmeyer
6.7 Eriochrome Black-T Indicator—Titrate 0.20 g of the
flask fitted with a cork through which passes a dropping tube
concentrated dye with 100 g of NaCl and store in a tightly
and rubber bulb (or medicine dropper) and obtain the total
stoppered jar. This mixture remains stable for several years.
weight. Weigh by difference to 0.5 mg, 0.18 to 0.22-g speci-
6.8 Isopropyl Alcohol (99.5%).
mens(8to12drops),into400-mLbeakers.Thisspecimensize
6.9 Zinc Chloride, Standard Solution (0.01 M)—Weigh to
is for driers of 6% iron content; adjust the size according to
0.5 mg about 0.65 g of zinc (Note 1) onto a glazed paper.
expected percent iron to contain about 0.2 mM of iron. Add
Transfertoa1-Lvolumetricflaskandadd25mLofdiluteHCl
100 mL of isopropyl alcohol and 3 mL 1+3 HCl
...
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