Designation:D848−14StandardTestMethodforAcidWashColorofIndustrialAromaticHydrocarbons1ThisstandardisissuedunderthefixeddesignationD848;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thistestmethodcoversthedeterminationoftheacidwashcolorofbenzene,toluene,xylenes,refinedsolventnaphthas,andsimilarindustrialaromatichydrocarbons.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSections8and12.1.2.ReferencedDocuments2.1ASTMStandards:2D1193SpecificationforReagentWaterD3437PracticeforSamplingandHandlingLiquidCyclicProductsD4790TerminologyofAromaticHydrocarbonsandRelatedChemicalsD6809GuideforQualityControlandQualityAssuranceProceduresforAromaticHydrocarbonsandRelatedMa-terials2.2OtherDocument:3OSHARegulations,29CFRparagraphs1910.1000and1910.12003.Terminology3.1SeeTerminologyD4790fordefinitionsoftermsusedinthistestmethod.4.SummaryofTestMethod4.1AmixtureofthearomatichydrocarbonandsulfuricacidisvigorouslyshakenandthecoloroftheacidlayeriscomparedwiththatofcolorstandardspreparedfromCoCl2andFeCl3.5.SignificanceandUse5.1Thistestmethodissuitableforsettingspecificationsonthematerialsreferencedin1.1.Itmayalsobeusedasaninternalqualitycontroltoolandindevelopmentorresearchwork.5.2Thecolordevelopedintheacidlayergivesanindicationofimpuritieswhichifsulfonatedwouldcausethematerialtobediscolored.6.Apparatus6.1ContainersforColorStandards—Clearandunblemished,clean,Frenchsquare,flin...
