ASTM D444-88(2008)

Standard Test Methods for Chemical Analysis of Zinc Yellow Pigment (Zinc Chromate Yellow)

SIGNIFICANCE AND USE
This test method has been developed to standardize the chemical analysis of zinc chromate yellow pigment and to provide alternate methods of analysis for chromium and zinc.
SCOPE
1.1 These test methods cover procedures for the chemical analysis of the pigment known commercially as “zinc yellow” or “ zinc chromate yellow.”
1.2 The analytical procedures appear in the following order:
  Sections Moisture and Other Volatile Matter7 Combined Water8 Chromium:  Dichromate Method 9-11  Thiosulfate Method9, 12, and 13 Zinc:  Hydroxyquinoline Method9, 14, and 15  Ferrocyanide Method9, 16, and 17 Alkaline Salts18 and 19 Sulfates20 and 21 Chlorides22 and 23 Matter Insoluble in Dilute Acetic
Acid24 Coarse Particles25
1.3 The values stated in SI units are to be considered the standard. The values given in parentheses are for information only.
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: 31-Jan-2008
• ICS: 87.060.10 - Pigments and extenders
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.31 - Pigment Specifications

Relations

• Replaces: ASTM D444-88(2003) - Standard Test Methods for Chemical Analysis of Zinc Yellow Pigment (Zinc Chromate Yellow)
• Effective Date: 01-Feb-2008
• Replaced By: ASTM D444-88(2014) - Standard Test Methods for Chemical Analysis of Zinc Yellow Pigment (Zinc Chromate Yellow)
• Effective Date: 01-Dec-2014
• Referred By: ASTM D3970-05(2023) - Standard Test Method for Cerium in Paint Driers by Oxidimetric Determination
• Effective Date: 01-Feb-2008
• Referred By: ASTM D478-02(2019) - Standard Specification for Zinc Yellow (Zinc Chromate) Pigments
• Effective Date: 01-Feb-2008
• Referred By: ASTM D1845-86(2020) - Standard Test Methods for Chemical Analysis of Strontium Chromate Pigment
• Effective Date: 01-Feb-2008

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D444 − 88(Reapproved 2008)
Standard Test Methods for
Chemical Analysis of Zinc Yellow Pigment (Zinc Chromate
1
Yellow)
This standard is issued under the fixed designation D444; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope D478 Specification for Zinc Yellow (Zinc Chromate) Pig-
ments
1.1 These test methods cover procedures for the chemical
D1193 Specification for Reagent Water
analysis of the pigment known commercially as “zinc yellow”
E11 Specification for Woven Wire Test Sieve Cloth and Test
or “zinc chromate yellow.”
Sieves
1.2 The analytical procedures appear in the following order:
E50 Practices for Apparatus, Reagents, and Safety Consid-
Sections
erations for Chemical Analysis of Metals, Ores, and
Moisture and Other Volatile Matter 7
Related Materials
Combined Water 8
Chromium:
Dichromate Method 9–11
3. Significance and Use
Thiosulfate Method 9, 12, and 13
Zinc: 3.1 This test method has been developed to standardize the
Hydroxyquinoline Method 9, 14, and 15
chemical analysis of zinc chromate yellow pigment and to
Ferrocyanide Method 9, 16, and 17
provide alternate methods of analysis for chromium and zinc.
Alkaline Salts 18 and 19
Sulfates 20 and 21
Chlorides 22 and 23
4. Preparation of Sample
Matter Insoluble in Dilute Acetic 24
Acid
4.1 Mix the laboratory sample thoroughly. Take a sufficient
Coarse Particles 25
quantity for the chemical analyses and pass it through a
1.3 The values stated in SI units are to be considered the
180-µm (No. 80) sieve, grinding in a mortar if necessary.
standard. The values given in parentheses are for information
NOTE 1—Detailed requirements for this sieve are given in Specification
only.
E11.
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 5. Reagents
responsibility of the user of this standard to establish appro-
5.1 Purity of Reagents—Unless otherwise indicated, it is
priate safety and health practices and determine the applica-
intended that all reagents shall conform to the specifications of
bility of regulatory limitations prior to use.
theCommitteeonAnalyticalReagentsoftheAmericanChemi-
3
cal Society, where such specifications are available. Other
2. Referenced Documents
grades may be used, provided it is first ascertained that the
2
2.1 ASTM Standards:
reagent is of sufficiently high purity to permit its use without
D185 Test Methods for Coarse Particles in Pigments
lessening the accuracy of the determination.
D280 Test Methods for Hygroscopic Moisture (and Other
5.2 Purity of Water—Unless otherwise indicated, references
Matter Volatile Under the Test Conditions) in Pigments
to water for use in the preparation of reagents and in analytical
procedures shall conform to Type II reagent water, in Specifi-
1
cation D1193.
These test methods are under the jurisdiction of ASTM Committee D01 on
Paint and Related Coatings, Materials, and Applications and are the direct
responsibility of Subcommittee D01.31 on Pigment Specifications.
Current edition approved Feb. 1, 2008. Published February 2008. Originally
3
approved in 1937. Last previous edition approved in 2003 as D444 – 88 (2003). Reagent Chemicals, American Chemical Society Specifications, American
DOI: 10.1520/D0444-88R08. Chemical Society, Washington, DC. For suggestions on the testing of reagents not
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or listed by the American Chemical Society, see Analar Standards for Laboratory
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
Standards volume information, refer to the standard’s Document Summary page on and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,
the ASTM website. MD.
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D444 − 88 (2008)
6. Precision 11. Procedure
6.1 Precision statements have not been established. 11.1 Pipet50mLofthesolutionofthespecimen(Section7)
into a 600-mLbeaker.Add 200 to 250 mLof water and 10 mL
MOISTURE AND OTHER VOLATILE MATTER
of H SO (sp gr 1.84). Cool to 35°C or below.
2 4
7. Procedure
11.2 Add an excess of ferrous ammonium sulfate solution
and back-titrate with 0.1 N K Cr O solution, using ortho-
2 2 7
7.1 Determine moisture and other volatile matter in accor-
phenanthroline indicat
...