Standard Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)

SIGNIFICANCE AND USE
4.1 The major objective of the visual Pt-Co method of color measurement is to rate specific materials for yellowness. The yellowness is frequently the result of the undesirable tendency of liquid hydrocarbons to absorb blue light due to contamination in processing, storage, or shipping.
SCOPE
1.1 This test method covers a procedure for the visual measurement of the color of near clear liquids. It is applicable only to materials in which the color-producing bodies present have light absorption characteristics nearly identical with those of the Platinum-Cobalt (Pt-Co) color standards used.  
1.2 This test method has been found applicable to the color measurement of clear, liquid samples, free of haze, with nominal Pt-Co color values between 0 and 100. It is applicable to nonfluorescent liquids with light absorption characteristics similar to those of the Pt-Co color standard solutions. Test Methods D1209, D1686, and D5386 deal with the visual and instrumental measurement of near-clear liquids.  
1.3 In determining the conformance of the test results using this method to applicable specifications, results shall be rounded in accordance with the rounding off methods of Practice E29.  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.5 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.  
1.6 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.

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Publication Date
30-Jun-2023
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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: D8005 − 23
Standard Test Method for
1
Color of Clear Liquids (Platinum-Cobalt Scale)
This standard is issued under the fixed designation D8005; 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* 2. Referenced Documents
2
1.1 This test method covers a procedure for the visual 2.1 ASTM Standards:
measurement of the color of near clear liquids. It is applicable D1193 Specification for Reagent Water
only to materials in which the color-producing bodies present D1209 Test Method for Color of Clear Liquids (Platinum-
have light absorption characteristics nearly identical with those Cobalt Scale)
of the Platinum-Cobalt (Pt-Co) color standards used. D1686 Test Method for Color of Solid Aromatic Hydrocar-
bons and Related Materials in the Molten State (Platinum-
1.2 This test method has been found applicable to the color
Cobalt Scale)
measurement of clear, liquid samples, free of haze, with
D3437 Practice for Sampling and Handling Liquid Cyclic
nominal Pt-Co color values between 0 and 100. It is applicable
Products
to nonfluorescent liquids with light absorption characteristics
D5386 Test Method for Color of Liquids Using Tristimulus
similar to those of the Pt-Co color standard solutions. Test
Colorimetry
Methods D1209, D1686, and D5386 deal with the visual and
D6809 Guide for Quality Control and Quality Assurance
instrumental measurement of near-clear liquids.
Procedures for Aromatic Hydrocarbons and Related Ma-
1.3 In determining the conformance of the test results using
terials
this method to applicable specifications, results shall be
E29 Practice for Using Significant Digits in Test Data to
rounded in accordance with the rounding off methods of
Determine Conformance with Specifications
Practice E29.
E691 Practice for Conducting an Interlaboratory Study to
1.4 The values stated in SI units are to be regarded as Determine the Precision of a Test Method
2.2 Other Documents:
standard. No other units of measurement are included in this
OSHA Regulations, 29 CFR paragraphs 1910.1000 and
standard.
3
1910.1200
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3. Summary of Test Method
responsibility of the user of this standard to establish appro-
3.1 A specimen is placed in a Nessler tube and compared to
priate safety, health, and environmental practices and deter-
a series of prepared Pt-Co standards.
mine the applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accor-
4. Significance and Use
dance with internationally recognized principles on standard-
4.1 The major objective of the visual Pt-Co method of color
ization established in the Decision on Principles for the
measurement is to rate specific materials for yellowness. The
Development of International Standards, Guides and Recom-
yellowness is frequently the result of the undesirable tendency
mendations issued by the World Trade Organization Technical
of liquid hydrocarbons to absorb blue light due to contamina-
Barriers to Trade (TBT) Committee.
tion in processing, storage, or shipping.
1 2
This test method is under the jurisdiction of ASTM Committee D16 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Aromatic, Industrial, Specialty and Related Chemicals and is the direct responsi- contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
bility of Subcommittee D16.01 on Benzene, Toluene, Xylenes, Cyclohexane and Standards volume information, refer to the standard’s Document Summary page on
Their Derivatives. the ASTM website.
3
Current edition approved July 1, 2023. Published July 2023. Originally approved Available from U.S. Government Printing Office Superintendent of Documents,
in 2015. Last previous edition approved in 2018 as D8005 – 18. DOI: 10.1520/ 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
D8005-23. www.access.gpo.gov.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D8005 − 23
TABLE 1 Absorbance Tolerance Limits for No. 500 Platinum-
5. Apparatus
Cobalt Stock Solution
5.1 Spectrophotometer, equipped for liquid samples and for
Wavelength, nm Absorbance
measurements in the visible region.
430 0.100 to
...

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: D8005 − 18 D8005 − 23
Standard Test Method for
1
Color of Clear Liquids (Platinum-Cobalt Scale)
This standard is issued under the fixed designation D8005; 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 This test method covers a procedure for the visual measurement of the color of near clear liquids. It is applicable only to
materials in which the color-producing bodies present have light absorption characteristics nearly identical with those of the
Platinum-Cobalt (Pt-Co) color standards used.
1.2 This test method has been found applicable to the color measurement of clear, liquid samples, free of haze, with nominal Pt-Co
color values between 0 and 100. It is applicable to nonfluorescent liquids with light absorption characteristics similar to those of
the Pt-Co color standard solutions. Test Methods D1209, D1686, and D5386 deal with the visual and instrumental measurement
of near-clear liquids.
1.3 In determining the conformance of the test results using this method to applicable specifications, results shall be rounded in
accordance with the rounding off methods of Practice E29.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 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.
1.6 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D1193 Specification for Reagent Water
D1209 Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)
D1686 Test Method for Color of Solid Aromatic Hydrocarbons and Related Materials in the Molten State (Platinum-Cobalt
Scale)
D3437 Practice for Sampling and Handling Liquid Cyclic Products
D5386 Test Method for Color of Liquids Using Tristimulus Colorimetry
D6809 Guide for Quality Control and Quality Assurance Procedures for Aromatic Hydrocarbons and Related Materials
1
This test method is under the jurisdiction of ASTM Committee D16 on Aromatic, Industrial, Specialty and Related Chemicals and is the direct responsibility of
Subcommittee D16.01 on Benzene, Toluene, Xylenes, Cyclohexane and Their Derivatives.
Current edition approved Feb. 1, 2018July 1, 2023. Published March 2018July 2023. Originally approved in 2015. Last previous edition approved in 20152018 as D8005
– 15. DOI: 10.1520/D8005-18.18. DOI: 10.1520/D8005-23.
2
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’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D8005 − 23
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
2.2 Other Documents:
3
OSHA Regulations, 29 CFR paragraphs 1910.1000 and 1910.1200
3. Summary of Test Method
3.1 A specimen is placed in a Nessler tube and compared to a series of prepared Pt-Co standards.
4. Significance and Use
4.1 The major objective of the visual Pt-Co method of color measurement is to rate specific materials for yellowness. The
yellowness is frequently the result of the undesirable tendency of liquid hydrocarbons to absorb blue light due to contamination
in processing, storage, or shipping.
5. Apparatus
5.1 Spectrophotometer, equipped for liquid samples and for measurements in the visible region.
5.1.1 The spectrophotometer used must be clean and in first-class operating condition. The instrument should be calibrated i
...

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