ASTM D3256-86(2014)
(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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: D3256 − 86 (Reapproved 2014)
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 4. Reagents
1.1 These test methods cover procedures for the qualitative 4.1 Purity of Reagents—Reagent grade chemicals shall be
chemical analysis of pigments known commercially as copper used in all tests. Unless otherwise indicated, it is intended that
phthalocyanine blue and green. all reagents shall conform to the specifications of the Commit-
tee onAnalytical Reagents of theAmerican Chemical Society,
1.2 The procedures appear in the following order:
where such specifications are available. Other grades may be
Section
used, provided it is first ascertained that the reagent is of
Identification 5
sufficiently high purity to permit its use without lessening the
Moisture and Other Volatile Matter 6
Detection of Basic Dye Derivatives 7 accuracy of the determination.
Detection of Other Organic Coloring Matter 8
4.2 Purity of Water—Unless otherwise indicated, references
Detection of Ultramarine Blue 9
Detection of Iron Blue or Chrome Green 10
to water shall be understood to mean Type II reagent grade
water conforming to Specification D1193.
1.3 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
5. Identification
standard.
5.1 To about 0.05 g of the sample in a 50-mLbeaker, add 30
1.4 This standard does not purport to address all of the
mL of sulfuric acid (H SO , sp gr 1.84). Stir occasionally for
2 4
safety concerns, if any, associated with its use. It is the
15 min, heating if necessary to accelerate the solution of the
responsibility of the user of this standard to establish appro-
pigment. Formation of a dark greenish yellow solution indi-
priate safety and health practices and determine the applica-
cates phthalocyanine blue and a dark reddish color indicates
bility of regulatory limitations prior to use.
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
3. Significance and Use
clearly evident. This indicates organically combined copper.
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
ments are present. These test methods may be used for
copper phthalocyanine pigments (2 to 50 mg/L) in H SO (sp gr 1.84).
2 4
manufacturing and purchasing quality control.
The absorption maxima, being sharp and well-defined, may be used for
positivequalitativeidentificationofphthalocyaninepigments.Phthalocya-
nine green has maxima at approximately 820 nm and 860 nm for
bromine-free types; for the chlorinated-brominated types, the maxima
These test methods are under the jurisdiction of ASTM Committee D01 on
appear at approximately 830 to 840 nm and 875 to 885 nm.
Paint and Related Coatings, Materials, and Applications and are the direct
responsibility of Subcommittee D01.31 on Pigment Specifications.
Current edition approved Dec. 1, 2014. Published December 2014. Originally
approved in 1973. Last previous edition approved in 2009 as D3256 – 86 (2009). Reagent Chemicals, American Chemical Society Specifications, American
DOI: 10.1520/D3256-86R14. Chemical Society, Washington, DC. For suggestions on the testing of reagents not
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 service@astm.org. For Annual Book of ASTM Chemicals, BDH Ltd., Poole, Dorset, U.K., and the Uni
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D3256 − 86 (Reapproved 2009) D3256 − 86 (Reapproved 2014)
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
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 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.
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.
2. Referenced Documents
2.1 ASTM Standards:
D280 Test Methods for Hygroscopic Moisture (and Other Matter Volatile Under the Test Conditions) in Pigments
D1193 Specification for Reagent Water
3. 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.
4. Reagents
4.1 Purity of Reagents—Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that all
reagents shall conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society, where
such specifications are available. Other grades may be used, provided it is first ascertained that the reagent is of sufficiently high
purity to permit its use without lessening the accuracy of the determination.
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 June 1, 2009Dec. 1, 2014. Published June 2009December 2014. Originally approved in 1973. Last previous edition approved in 20042009 as
D3256 – 86 (2004).(2009). DOI: 10.1520/D3256-86R09.10.1520/D3256-86R14.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’sstandard’s Document Summary page on the ASTM website.
Reagent Chemicals, American Chemical Society Specifications, American Chemical Society, Washington, DC. For suggestions on the testing of reagents not listed by
the American Chemical Society, see Analar Standards for Laboratory Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia and National
Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville, MD.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D3256 − 86 (2014)
4.2 Purity of Water—Unless otherwise indicated, references to water shall be understood to mean Type II reagent grade water
conforming to Specification D1193.
5. Identification
5.1 To about 0.05 g of the sample in a 50-mL beaker, add 30 mL of sulfuric acid (H SO , sp gr 1.84). Stir occasionally for 15
2 4
min, heating if necessary to accelerate the solution of the pigment. Formation of a dark greenish yellow solution indicates
phthalocyanine blue and a dark reddish color indicates brominated green pigment. Pour the solution into 250 mL of water and stir.
The phthalocyanine pigment should immediately precipitate as a flocculent mass.
5.2 Filter off the precipitate, washing once or twice with water. Scrape a small amount of the precipitate off the filter, place on
a clean platinum wire moistened with hydrochloric acid (HCl), and subject it to the low flame of a bunsen burn
...
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