ASTM_D_5386_-_10.pdf

Designation:D538610Standard 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.Scope*1.1 This test method covers an instrumental method for theCIE(Commission International de lEclairage)tristimulusmeasurement of the color of near-clear liquid samples.Themeasurement is converted to color ratings in the platinum-cobalt system.1.2 This test method has been found applicable to the colormeasurement of clear,liquid samples,free of haze,withnominal platinum cobalt color values in the 0 to 100 range.Itis applicable to nonfluorescent liquids with light absorptioncharacteristics similar to those of the platinum cobalt colorstandard solutions.Test Methods D1686,D2108,and E450deal with the visual and instrumental measurement of near-clear liquids.1.3 In determining the conformance of the test results usingthis method to applicable specifications,results shall berounded in accordance with the rounding off methods ofPractice E29.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5 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 WaterD1209 Test Method for Color of Clear Liquids(Platinum-Cobalt Scale)D1686 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-terialsE29 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 CoordinatesE450 Test Method for Measurement of Color of Low-Colored Clear Liquids Using the Hunterlab Color Differ-ence Meter(Withdrawn 1993)3E691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 Other Document:OSHA Regulations,29 CFR paragraphs 1910.1000 and1910.120043.Summary of Test Method3.1 Color is measured by tristimulus values of light trans-mitted by a sample as percent of light transmitted by distilledwater.Convert the measured tristimulus values by appropriateequations to the platinum-cobalt scale.4.Significance and Use4.1 The major objective of the visual platinum-cobalt(Pt-Co)method of color measurement,as defined in Test MethodD1209,is to rate specific materials for yellowness.This1This 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 Jan.1,2010.Published January 2010.Originallyapproved in 1993.Last previous edition approved in 2005 as D5386 05.DOI:10.1520/D5386-10.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.4Available 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.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 yellowness is frequently the result of the undesirable tendencyof liquid hydrocarbons to absorb blue light due to contamina-tion in processing,storage or shipping.4.2 Clear liquids can be rated for light absorbing yellowishor brownish contaminants,using scales that simulate thelong-established visual-comparison method just cited.Whereneeded,dimensions of color can be reported to identify anypinkness or greenness(one dimension),or grayness.5.Apparatus5.1 Instrument,with the following provisions:5.1.1 Instrument Sensor,shall provide a beam for illuminat-ing the sample cell in