ASTM_D_1363_-_06_2011.pdf

Designation:D136306(Reapproved 2011)Standard Test Method forPermanganate Time of Acetone and Methanol1This standard is issued under the fixed designation D1363;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.This standard has been approved for use by agencies of the Department of Defense.1.Scope*1.1 This test method covers the detection in acetone andmethanol of the presence of impurities that reduce potassiumpermanganate.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 digit 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 as thestandard.The values given in parentheses are for informationonly.1.4 For specific hazard information and guidance,consultthe suppliers Material Safety Data Sheet.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.2.Referenced Documents2.1 ASTM Standards:2D329 Specification for AcetoneD1152 Specification for Methanol(Methyl Alcohol)D1193 Specification for Reagent WaterD1209 Test Method for Color of Clear Liquids(Platinum-Cobalt Scale)E29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE180 Practice for Determining the Precision of ASTMMethods for Analysis and Testing of Industrial and Spe-cialty Chemicals(Withdrawn 2009)3E346 Test Methods for Analysis of Methanol3.Summary of Test Method3.1 Substances reacting with potassium permanganate inneutral solutions reduce it to manganese dioxide which colorsthe solution yellow.In the permanganate test the time requiredfor the color of the test solution to change to that of a standardsolution is measured.The color of the test solution changesfrom pink-orange to yellow-orange.4.Significance and Use4.1 The permanganate time can be used to judge thepresence of oxidizable materials that may be associated withmanufacture or contamination during distribution and to assesscompliance with a specification.4.2 Many chemical processes that use acetone or methanol,or both,involve catalyst,metals,or ligand complexes that aresensitive to oxidation.Since oxidizable contaminants mayaffect the efficiency of these processes,this test methodprovides a comparative test for manufacturing control andassessing compliance with a specification.5.Apparatus5.1 Color Comparison TubesMatched 50-mL,tall formNessler tubes,provided with ground on,optically clear,glasscaps.5.2 Constant-Temperature Bath,capable of maintaining atemperature of 15.0 6 0.5C or of 25.0 6 0.5C.It is importantthat the constant-temperature bath be protected from directlight.If a glass constant-temperature bath is employed,itshould be wrapped or coated with an opaque material.5.3 Pipet,capable of delivering 2.0 mL of solution.5.4 Interval Timer and Clock,capable of measuring a timeinterval of 120 min or more.An alarm arrangement may bedesirable.1This test method 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 1955.Last previous edition approved in 2006 as D1363 06.DOI:10.1520/D1363-06R11.2For 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.*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 6.Reagents6.1 Reagent-grade chemicals shall be used in all tests.Unless otherwise indicated,it is intended that all reagents shallconform to the specifications of the Committee on AnalyticalReagents of the American Chemical Society,where suchspecifications are available.4Other grades may be used,pro-vided it is first ascertained that the reagent is of sufficientlyhigh purity to permit its use without lessening the accuracy ofthe determination.6.2 Unless otherwise indicated,references to water shall beunderstood to mean reagent water conforming to Type IV ofSpecification D1193.6.3 Potassium Permanganate Solution(0.200 g/L)Dis