1、Designation:D800515Standard Test Method forColor of Clear Liquids(Platinum-Cobalt Scale)1This standard is issued under the fixed designation D8005;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
2、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 a procedure for the visualmeasurement of the color of near clear liquids.It is applicableonly to materials in which the color
3、-producing bodies presenthave light absorption characteristics nearly identical with thoseof the Platinum-Cobalt(Pt-Co)color standards used.1.2 This test method has been found applicable to the colormeasurement of clear,liquid samples,free of haze,withnominal Pt-Co color values between 0 and 100.It
4、is applicableto nonfluorescent liquids with light absorption characteristicssimilar to those of the Pt-Co color standard solutions.TestMethods D1209,D1686,and D5386 deal with the visual andinstrumental measurement of near-clear liquids.1.3 In determining the conformance of the test results usingthis
5、 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 thes
6、afety 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.2.Referenced Documents2.1 ASTM Standards:2D1193 Specification for Reagent W
7、aterD1209 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)D3437 Practice for Sampling and Handling Liquid CyclicProductsD5386 Test Method for Color of Liquids Usin
8、g TristimulusColorimetryD6809 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 Specifications2.2 Other Documents:OSHA Regulations,29 CFR paragraphs 1910.1000 a
9、nd1910.120033.Summary of Test Method3.1 A specimen is placed in a Nessler tube and compared toa series of prepared Pt-Co standards.4.Significance and Use4.1 The major objective of the visual Pt-Co method of colormeasurement is to rate specific materials for yellowness.Theyellowness is frequently the
10、 result of the undesirable tendencyof liquid hydrocarbons to absorb blue light due to contamina-tion in processing,storage,or shipping.5.Apparatus5.1 Spectrophotometer,equipped for liquid samples and formeasurements in the visible region.5.1.1 The spectrophotometer used must be clean and infirst-cla
11、ss operating condition.The instrument should be cali-brated in accordance with the instructions in the Standards forChecking and Calibration of Spectrophotometers(200 to 1000cm).45.2 Spectrophotometer Cells,matched having a 10-mm lightpath.5.3 Color Comparison TubesMatched 100-mL,tall-formNessler tu
12、bes,provided with ground-on,optically clear,glass1This test method is under the jurisdiction of ASTM Committee D16 onAromatic Hydrocarbons and Related Chemicals and is the direct responsibility ofSubcommittee D16.01 on Benzene,Toluene,Xylenes,Cyclohexane and TheirDerivatives.Current edition approved
13、 June 1,2015.Published June 2015.DOI:10.1520/D8005-15.2For 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 f
14、rom U.S.Government Printing Office Superintendent of Documents,732 N.Capitol St.,NW,Mail Stop:SDE,Washington,DC 20401,http:/www.access.gpo.gov.4See NIST Circular LC-1017.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 caps.Tubes should be
15、 selected so that the height of the 100-mLgraduation mark is 275 to 295 mm above the bottom of thetube.5.4 Color ComparatorA color comparator constructed topermit visual comparison of light transmitted through tall-form100-mL Nessler tubes in the direction of their longitudinalaxes.The comparator sh
16、ould be constructed so that white lightis passed through or reflected off a white glass plate anddirected with equal intensity through the tubes,and should beshielded so that no light enters the tubes from the side.56.Reagents6.1 Purity of ReagentsReagent grade chemicals shall beused in all tests.Unless otherwise indicated,it is intended thatall reagents shall conform to the specifications of the Commit-tee on Analytical Reagents of the American Chemical Society,where such specifications are ava
