Designation:D5303−92(Reapproved2012)StandardTestMethodforTraceCarbonylSulfideinPropylenebyGasChromatography1ThisstandardisissuedunderthefixeddesignationD5303;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftracesofcarbonylsulfide(COS)inpropylene.ItisapplicabletoCOSconcentrationsfrom0.5to4.0mg/kg(partspermillionbymass).SeeNote1.NOTE1—Thelowerlimitofthistestmethodisbelievedtobebelow0.1mg/kg,dependingonsamplesizeandsensitivityoftheinstrumentationbeingused.However,thecooperativetestingprogramwasconductedinthe0.5to4.0rangeduetolimitationsinpreparingcommercialtestmixtures.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.SpecifichazardsstatementsaregiveninSection8.2.ReferencedDocuments2.1ASTMStandards:2D3609PracticeforCalibrationTechniquesUsingPerme-ationTubesD4468TestMethodforTotalSulfurinGaseousFuelsbyHydrogenolysisandRateometricColorimetryE840PracticeforUsingFlamePhotometricDetectorsinGasChromatography3.SummaryofTestMethod3.1Aprocedureisgivenforremovingasamplefromthesamplecylinder,separatingCOSfrompropylene,detectingCOS,calibratingthedetector,quantitatingCOScontentinthesample,andassayingthegasstandard.Generalcommentsandrecommendedtechniquesaregiven.3.2Arelativelylargevolumeofsampleisinjectedintoagaschromatographhavingasinglepackedcolumn,operatediso-thermallyat10to50°C,thatseparatesCOSfrompropylene.COSisdetectedwithaflamephotometricdetector.3.3Calibrationdata,basedonpeakareas,areobtainedusingaknowngasstandardblendofCOSint...
