Designation:D2165−94(Reapproved2012)´1StandardTestMethodforpHofAqueousExtractsofWoolandSimilarAnimalFibers1ThisstandardisissuedunderthefixeddesignationD2165;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.ε1NOTE—TheterminologysectionwasupdatedinJuly2012.1.Scope1.1ThistestmethodcoversthedeterminationofthepHofaqueousextractsfromwoolandsimilaranimalfibers.Itisapplicabletofibersinanycondition—rawwool,scouredwool,sliver,top,yarn,orfabric.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecificprecautionarystatements,seeSection11.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesD2525PracticeforSamplingWoolforMoistureD4845TerminologyRelatingtoWoolE70TestMethodforpHofAqueousSolutionsWiththeGlassElectrode3.Terminology3.1ForallterminologyrelatedtoD13.13,refertoTermi-nologyD4845.3.1.1Thefollowingtermsarerelevanttothisstandard:aqueousextract,pH.3.2Forallotherterminologyrelatedtotextiles,seeTermi-nologyD123.4.SummaryofTestMethod4.1Anextractispreparedusingdistilledwateror0.1Nsodiumchloridesolutionattheboilunderreflux,oratroomtemperaturewithagitation.ThepHoftheextractismeasuredelectrometricallywithaglasselectrode.5.SignificanceandUse5.1ThepHvaluesoftheextractsgiveanindicationoftheacidityoralkalinityofthefiberanditswater-solubleimpuri-ties.Thesevaluesareusefulinindicatingpreviousprocessingandinanticipatingsubsequentperformance.Forparticularpurposes,thepHofanextractpreparedbyonemethodmaybeamoreinformativeindexthananotherandasaconsequencefouroptionalextractionproceduresareincluded.5.2This...
