ASTM D3256-86(2020)
(Test Method)Standard Test Methods for Chemical Analysis of Phthalocyanine Blue and Green Pigments
Standard Test Methods for Chemical Analysis of Phthalocyanine Blue and Green Pigments
SIGNIFICANCE AND USE
3.1 These test methods are suitable for determining if impurities are present and establishing that the required pigments are present. These test methods may be used for manufacturing and purchasing quality control.
SCOPE
1.1 These test methods cover procedures for the qualitative chemical analysis of pigments known commercially as copper phthalocyanine blue and green.
1.2 The procedures appear in the following order:
Section
Identification
5
Moisture and Other Volatile Matter
6
Detection of Basic Dye Derivatives
7
Detection of Other Organic Coloring Matter
8
Detection of Ultramarine Blue
9
Detection of Iron Blue or Chrome Green
10
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: D3256 − 86 (Reapproved 2020)
Standard Test Methods for
Chemical Analysis of Phthalocyanine Blue and Green
Pigments
This standard is issued under the fixed designation D3256; 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.
1. Scope 3. Significance and Use
1.1 These test methods cover procedures for the qualitative 3.1 These test methods are suitable for determining if
chemical analysis of pigments known commercially as copper impurities are present and establishing that the required pig-
phthalocyanine blue and green. ments are present. These test methods may be used for
manufacturing and purchasing quality control.
1.2 The procedures appear in the following order:
Section
4. Reagents
Identification 5
4.1 Purity of Reagents—Reagent grade chemicals shall be
Moisture and Other Volatile Matter 6
Detection of Basic Dye Derivatives 7
used in all tests. Unless otherwise indicated, it is intended that
Detection of Other Organic Coloring Matter 8
all reagents shall conform to the specifications of the Commit-
Detection of Ultramarine Blue 9
tee onAnalytical Reagents of theAmerican Chemical Society,
Detection of Iron Blue or Chrome Green 10
where such specifications are available. Other grades may be
1.3 The values stated in SI units are to be regarded as
used, provided it is first ascertained that the reagent is of
standard. No other units of measurement are included in this
sufficiently high purity to permit its use without lessening the
standard.
accuracy of the determination.
1.4 This standard does not purport to address all of the
4.2 Purity of Water—Unless otherwise indicated, references
safety concerns, if any, associated with its use. It is the
to water shall be understood to mean Type II reagent grade
responsibility of the user of this standard to establish appro-
water conforming to Specification D1193.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
5. Identification
1.5 This international standard was developed in accor-
5.1 To about 0.05 g of the sample in a 50-mLbeaker, add 30
dance with internationally recognized principles on standard-
mL of sulfuric acid (H SO , sp gr 1.84). Stir occasionally for
2 4
ization established in the Decision on Principles for the
15 min, heating if necessary to accelerate the solution of the
Development of International Standards, Guides and Recom-
pigment. Formation of a dark greenish yellow solution indi-
mendations issued by the World Trade Organization Technical
cates phthalocyanine blue and a dark reddish color indicates
Barriers to Trade (TBT) Committee.
brominated green pigment. Pour the solution into 250 mL of
water and stir. The phthalocyanine pigment should immedi-
2. Referenced Documents
ately precipitate as a flocculent mass.
2.1 ASTM Standards:
5.2 Filter off the precipitate, washing once or twice with
D280 Test Methods for Hygroscopic Moisture (and Other
water. Scrape a small amount of the precipitate off the filter,
Matter Volatile Under the Test Conditions) in Pigments
place on a clean platinum wire moistened with hydrochloric
D1193 Specification for Reagent Water
acid (HCl), and subject it to the low flame of a bunsen burner.
As the precipitate burns, a light blue-green flame should be
clearly evident. This indicates organically combined copper.
These test methods are under the jurisdiction of ASTM Committee D01 on
Paint and Related Coatings, Materials, and Applications and are the direct NOTE 1—Characteristic spectrophotometric absorption spectra in the
responsibility of Subcommittee D01.31 on Pigment Specifications.
CurrenteditionapprovedJune1,2020.PublishedJuly2020.Originallyapproved
in 1973. Last previous edition approved in 2014 as D3256 – 86 (2014). DOI: ACS Reagent Chemicals, Specifications and Procedures for Reagents and
10.1520/D3256-86R20. 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
...
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