ASTM D3256-86(1999)

Standard Test Methods for Chemical Analysis of Phthalocyanine Blue and Green Pigments

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 This standard does not purport to address the safety problems 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-May-1999
• ICS: 87.060.10 - Pigments and extenders
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.31 - Pigment Specifications

Relations

• Replaced By: ASTM D3256-86(2004) - Standard Test Methods for Chemical Analysis of Phthalocyanine Blue and Green Pigments
• Effective Date: 01-Jun-2004

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
Designation:D3256–86 (Reapproved 1999)
Standard Test Methods for
Chemical Analysis of Phthalocyanine Blue and Green
Pigments
This standard is issued under the fixed designation D 3256; 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 tee onAnalytical Reagents of theAmerican Chemical Society,
where such specifications are available. Other grades may be
1.1 These test methods cover procedures for the qualitative
used, provided it is first ascertained that the reagent is of
chemical analysis of pigments known commercially as copper
sufficiently high purity to permit its use without lessening the
phthalocyanine blue and green.
accuracy of the determination.
1.2 The procedures appear in the following order:
4.2 Purity of Water—Unless otherwise indicated, references
Section
to water shall be understood to mean Type II reagent grade
Identification 5
water conforming to Specification D 1193D 1193.
Moisture and Other Volatile Matter 6
Detection of Basic Dye Derivatives 7
Detection of Other Organic Coloring Matter 8
5. Identification
Detection of Ultramarine Blue 9
5.1 To about 0.05 g of the sample in a 50-mLbeaker, add 30
Detection of Iron Blue or Chrome Green 10
mL of sulfuric acid (H SO , sp gr 1.84). Stir occasionally for
2 4
1.3 This standard does not purport to address the safety
15 min, heating if necessary to accelerate the solution of the
concerns, if any, associated with its use. It is the responsibility
pigment. Formation of a dark greenish yellow solution indi-
of the user of this standard to establish appropriate safety and
cates phthalocyanine blue and a dark reddish color indicates
health practices and determine the applicability of regulatory
brominated green pigment. Pour the solution into 250 mL of
limitations prior to use.
water and stir. The phthalocyanine pigment should immedi-
ately precipitate as a flocculent mass.
2. Referenced Documents
5.2 Filter off the precipitate, washing once or twice with
2.1 ASTM Standards:
water. Scrape a small amount of the precipitate off the filter,
D 280 Test Methods for Hygroscopic Moisture (and Other
place on a clean platinum wire moistened with hydrochloric
Matter Volatile Under the Test Conditions) in Pigments
acid (HCl), and subject it to the low flame of a bunsen burner.
D 1193 Specification for Reagent Water
As the precipitate burns, a light blue-green flame should be
clearly evident. This indicates organically combined copper.
3. Significance and Use
3.1 These test methods are suitable for determining if
NOTE 1—Characteristic spectrophotometric absorption spectra in the
impurities are present and establishing that the required pig- near infrared range (700 to 900 nm) are exhibited by dilute solutions of
copper phthalocyanine pigments (2 to 50 mg/L) in H SO (sp gr 1.84).
ments are present. These test methods may be used for 2 4
The absorption maxima, being sharp and well-defined, may be used for
manufacturing and purchasing quality control.
positivequalitativeidentificationofphthalocyaninepigments.Phthalocya-
nine green has maxima at approximately 820 nm and 860 nm for
4. Reagents
bromine-free types; for the chlorinated-brominated types, the maxima
4.1 Purity of Reagents—Reagent grade chemicals shall be
appear at approximately 830 to 840 nm and 875 to 885 nm.
used in all tests. Unless otherwise indicated, it is intended that
6. Moisture and Other Volatile Matter
all reagents shall conform to the specifications of the Commit-
6.1 Determine moisture in accordance with Method A of
Test Methods D 280D 280.
ThesetestmethodsareunderthejurisdictionofASTMCommitteeD-1onPaint
and Related Coatings, Materials, and Applications and are the direct responsibility
of Subcommittee D 01.31 on Pigment Specifications. “Reagent Chemicals,American Chemical Society Specifications,”Am. Chemi-
Current edition approved March 27, 1986. Published May 1986. Originally cal Soc., Washington, DC. For suggestions on the testing of reagents not listed by
published as D 3256 – 73. Last previous edition D 3256 – 73. theAmerican Chemical Society, see “Reagent Chemicals and Standards,” by Joseph
Annual Book of ASTM Standards, Vol 06.03. Rosin, D. Van Nostrand Co., Inc., New York, NY, and the “United
...