Designation:D7674−14a(Reapproved2021)StandardTestMethodforHexane/PetroleumEtherExtractinWetBlueandWetWhite1ThisstandardisissuedunderthefixeddesignationD7674;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthequantitativeextractionofalltypesofwetblueandwetwhitewithhexaneorpetroleumether.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.Foraspecifichazardstatement,seeSection7.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D3495TestMethodforHexaneExtractionofLeatherD6658TestMethodforVolatileMatter(Moisture)ofWetBluebyOvenDryingD6659PracticeforSamplingandPreparationofWetBlueandWetWhiteforPhysicalandChemicalTestsE177PracticeforUseoftheTermsPrecisionandBiasinASTMTestMethodsE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethod3.SummaryofTestMethod3.1Aspecimenisanalyzedasreceivedinwetstate,diced;orpre-driedatthedeterminedsettingthengroundpriortoanalysis.Thepreparedspecimenisextractedwithsolvent.AnotherspecimenfromthesamesampleisalsoanalyzedformoisturecontentinaccordancewithTestMethodD6658.Followingcompletionoftheextractionprocess,theextractisdried,thencooledandweighed.Theextractisreportedasextractablesonamoisture-freebasis.4.Sig...
