ASTM_D_5386_-_16.pdf

Designation:D538616Standard Test Method forColor of Liquids Using Tristimulus Colorimetry1This standard is issued under the fixed designation D5386;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers an instrumental method for theCIE(Commission International de lEclairage)tristimulusmeasurement of the color of near-clear liquid samples.Thetransmission measurement values are converted to the colorscale in the platinum-cobalt(Pt-Co)system.1.2 This test method has been found applicable to the colormeasurement of clear,liquid samples,free of haze,withnominal Pt-Co color values in the 0 to 100 range.It isapplicable to non-fluorescent liquids with light absorptioncharacteristics similar to those of the Pt-Co color standardsolutions.1.3 The tristimulus colorimetry may be calculated fromspectral measurements or be obtained directly from a colorim-eter.Practice E1455 provides some guidance on colorimeters,while Test Methods D1686 and D2108 deal with the visual andinstrumental measurement of near-clear liquids.1.4 In determining the conformance of the test results usingthis method to applicable specifications,results shall berounded in accordance with the rounding off methods ofPractice E29.1.5 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.6 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.For specific hazardstatements,see Section 8.2.Referenced Documents2.1 ASTM Standards:2D1193 Specification for Reagent WaterD1686 Test Method for Color of Solid Aromatic Hydrocar-bons and Related Materials in the Molten State(Platinum-Cobalt Scale)D2108 Test Method for Color of Halogenated OrganicSolvents and Their Admixtures(Platinum-Cobalt Scale)D3437 Practice for Sampling and Handling Liquid CyclicProductsD6809 Guide for Quality Control and Quality AssuranceProcedures for Aromatic Hydrocarbons and Related Ma-terialsD8005 Test Method for Color of Clear Liquids(Platinum-Cobalt Scale)E29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE179 Guide for Selection of Geometric Conditions forMeasurement of Reflection and Transmission Propertiesof MaterialsE308 Practice for Computing the Colors of Objects by Usingthe CIE SystemE313 Practice for Calculating Yellowness and WhitenessIndices from Instrumentally Measured Color CoordinatesE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE1455 Practice for Obtaining Colorimetric Data from aVisual Display Unit Using Tristimulus Colorimeters2.2 Other Document:OSHA Regulations,29 CFR paragraphs 1910.1000 and1910.120033.Summary of Test Method3.1 The color of a liquid sample is measured as thedifference between the tristimulus values for the light trans-mitted through the sample minus the tristimulus values for the1This test method is under the jurisdiction of ASTM Committee D16 onAromatic Hydrocarbons and Related Chemicals and is the direct responsibility ofSubcommittee D16.04 on Instrumental Analysis.Current edition approved Dec.1,2016.Published January 2017.Originallyapproved in 1993.Last previous edition approved in 2010 as D5386 10.DOI:10.1520/D5386-16.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from U.S.Government Printing Office Superintendent of Documents,732 N.Capitol St.,NW,Mail Stop:SDE,Washington,DC 20401,http:/www.access.gpo.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 light transmitted through the same path length of water(Specification D1193,Type IV).The difference between thetristimulus values are used to calculate the color on the Pt-Coscale using the appropriate equations.4.Significance and Use4.1 The primary objective of the visual method of Pt-Cocolor measurement,as defined in Test Method D8005,is to ratespecific materials for yellowness.This yellowness is frequentlythe result of the undesirable tendency of liquid hydrocarbons toabsorb blue light du