ASTM D3804-86(1996)

Standard Test Method for Iron in Paint Driers by EDTA Method

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 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-2002
• 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 D3804-02 - Standard Test Method for Iron in Paint Driers by EDTA Method
• Effective Date: 10-Jan-2002
• Referred By: ASTM D564-87(2023) - Standard Test Methods for Liquid Paint Driers
• Effective Date: 10-Jan-2002

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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.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.
Designation: D 3804 – 86 (Reapproved 1996)
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
Iron in Paint Driers by EDTA Method
This standard is issued under the fixed designation D 3804; 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.
1. Scope 6. Reagents
1.1 This test method covers the titrimetric determination of 6.1 Purity of Reagents—Reagent grade chemicals shall be
iron in liquid iron driers soluble in isopropyl alcohol and used in all tests. Unless otherwise indicated, it is intended that
utilizes the disodium salt of ethylenediaminetetraacetic acid all reagents shall conform to the specifications of the Commit-
dihydrate (EDTA). tee on Analytical Reagents of the American Chemical Society,
1.2 This test method is limited to the determination of the where such specifications are available. Other grades may be
iron content of a liquid drier that does not contain other drier used, provided it is first ascertained that the reagent is of
elements. This method is not applicable to drier blends. sufficiently high purity to permit its use without lessening the
1.3 This standard does not purport to address all of the accuracy of the determination.
safety concerns, if any, associated with its use. It is the 6.2 Purity of Water—Unless otherwise indicated, references
responsibility of the user of this standard to establish appro- to water shall be understood to mean reagent water conforming
priate safety and health practices and determine the applica- to Type II of Specification D 1193.
bility of regulatory limitations prior to use. 6.3 Ammonium Hydroxide (1+3)—Add 10 mL of concen-
trated ammonium hydroxide (NH OH, sp gr 0.90) to 30 mL
2. Referenced Documents
water.
2.1 ASTM Standards: 6.4 Buffer Solution—Add 350 mL of concentrated ammo-
D 600 Specification for Liquid Paint Driers
nium hydroxide (NH OH) to 54 g of ammonium chloride
D 1193 Specification for Reagent Water (NH Cl) and dilute to 1 L with water.
E 180 Practice for Determining the Precision of ASTM
6.5 EDTA, Standard Solution (0.01 M)—Weigh to 10 mg
Methods for Analysis and Testing of Industrial Chemicals about 3.73 g of the disodium salt of ethylenediaminetetraacetic
E 300 Practice for Sampling Industrial Chemicals
acid dihydrate (EDTA), dissolve in water, and dilute to
approximately 1 L in a polyethylene or borosilicate glass
3. Summary of Test Method
bottle.
3.1 The liquid iron drier is diluted with isopropyl alcohol
6.6 Hydrochloric Acid (1+3)—Add 3 mL of concentrated
and the iron chelated with excess standard EDTA. The solution
hydrochloric acid (HCl, sp gr 1.19) to 9 mL of water.
is buffered and the excess EDTA is titrated with standard zinc
6.7 Eriochrome Black-T Indicator—Titrate 0.20 g of the
chloride solution to the Eriochrome Black T end point.
concentrated dye with 100 g of NaCl and store in a tightly
stoppered jar. This mixture remains stable for several years.
4. Significance and Use
6.8 Isopropyl Alcohol (99.5 %).
4.1 This test method may be used to confirm the stated
6.9 Zinc Chloride, Standard Solution (0.01 M)—Weigh to
content of a liquid iron drier soluble in isopropyl alcohol and
0.5 mg about 0.65 g of zinc (Note 1) onto a glazed paper.
manufactured for use in the coatings industry. The content
Transfer to a 1-L volumetric flask and add 25 mL of dilute HCl
determines activity level.
(7+18) (add 7 mL of concentrated acid (sp gr 1.19) to 18 mL
of water). Warm if necessary on a steam bath to dissolve
5. Interferences
completely. Cool, dilute to the mark with water and mix
5.1 All cations that can be titrated with EDTA in alkaline
thoroughly. Calculate the exact molarity of this approximately
media interfere and must not be present in the sample or must
0.01-M solution as follows:
be masked.
M 5 W/65.4 (1)
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 Paints and Paint Materials.
Current edition approved April 25, 1986. Published June 1986. Originally Chemical Society, Washington, DC. For suggestions on the testing of reagents not
published as D 3804 – 79. Last previous edition D 3804 – 79. 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. Pharmacopeial Convention, Inc. (USPC), Rockville,
Annual Book of ASTM Standards, Vol 15.05. MD.
D 3804
addition should result in a blue-colored solution. Immediately
where:
back-titrate the excess EDTA with the standard ZnCl solution
M 5 molarity of ZnCl solution, and
2 2
(Note 3) to the first permanent tinge of red (Note 4). The
W 5 zinc used, g.
65.4 5 atomic weight of zinc. back-titration must be completed within 2 min (Note 5 and
Note 6).
NOTE 1—Zinc ribbon cut into small pieces with clean scissors is
preferred. Granular (20 mesh) zinc requires several hours of heating on a
NOTE 3—During the titration stir the solution manually or by means of
steam bath for complete solution. Store the zinc ribbon in a tightly sealed
a
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