1、Designation:D120905(Reapproved 2011)Standard Test Method forColor of Clear Liquids(Platinum-Cobalt Scale)1This standard is issued under the fixed designation D1209;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revi
2、sion.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1.Scope*1.1 This test method describes a procedure for the vis
3、ualmeasurement of the color of essentially light colored liquids(Note 1).It is applicable only to materials in which thecolor-producing bodies present have light absorption charac-teristics nearly identical with those of the platinum-cobalt colorstandards used.NOTE1A procedure for estimating color o
4、f darker liquids,describedfor soluble nitrocellulose base solutions,is given in Guide D365.1.2 For purposes of determining conformance of an ob-served or a calculated value using this test method to relevantspecifications,test result(s)shall be rounded off“to the nearestunit”in the last right-hand d
5、igit used in expressing thespecification limit,in accordance with the rounding-off methodof Practice E29.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 For specific hazard information,see the Material SafetyData Sheet.1.
6、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 hazards
7、tatements see Section 6.2.Referenced Documents2.1 ASTM Standards:2D156 Test Method for Saybolt Color of Petroleum Products(Saybolt Chromometer Method)D365 Guide for Soluble Nitrocellulose Base SolutionsD1193 Specification for Reagent WaterE29 Practice for Using Significant Digits in Test Data toDete
8、rmine Conformance with SpecificationsE202 Test Methods for Analysis of Ethylene Glycols andPropylene GlycolsE346 Test Methods for Analysis of Methanol3.Significance and Use3.1 The property of color of a solvent varies in importancewith the application for which it is intended,the amount ofcolor that
9、 can be tolerated being dependent on the colorcharacteristics of the material in which it is used.The paint,varnish,and lacquer solvents,or diluents commercially avail-able on todays market normally have little or no color.Thepresence or absence of color in such material is an indicationof the degre
10、e of refinement to which the solvent has beensubjected or of the cleanliness of the shipping or storagecontainer in which it is handled,or both.3.2 For a number of years the term“water-white”wasconsidered sufficient as a measurement of solvent color.Several expressions for defining“water-white”gradu
11、ally ap-peared and it became evident that a more precise color standardwas needed.This was accomplished in 1952 with the adoptionof Test Method D1209 using the platinum-cobalt scale.Thistest method is similar to the description given in StandardMethods for the Examination of Water and Waste Water3an
12、dis referred to by many as“APHA Color.”The preparation ofthese platinum-cobalt color standards was originally describedby A.Hazen in the American Chemical Journal4in which heassigned the number 5(parts per ten thousand)to his platinum-cobalt stock solution.Subsequently,in their first edition(1905)of
13、 Standard Methods for the Examination of Water,theAmerican Public Health Association,using exactly the sameconcentration of reagents,assigned the color designation 500(parts per million)which is the same ratio.The parts permillion nomenclature is not used since color is not referred1This test method
14、 is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.35 on Solvents,Plasticizers,and Chemical Intermediates.Current edition approved Feb.1,2011.Published February 2011.Originallyapproved in 1952.L
15、ast previous edition approved in 2005 as D1209 051.DOI:10.1520/D1209-05R11.2For 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
16、 website.3Standard Methods for the Examination of Water and Waste Water,M.Franson,Ed.,American Public Health Assoc.,14th ed.,1975,p.65.4Hazen,A.,“New Color Standard for Natural Waters,”American ChemicalJournal,Vol XIV,1892,p.300310.*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 directly to a weight relationship.It is therefore recommendedthat the incorrect term“Hazen Co
