Designation:D3741−00(Reapproved2015)´1StandardTestMethodsforAppearanceofAdmixturesContainingHalogenatedOrganicSolvents1ThisstandardisissuedunderthefixeddesignationD3741;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—UnitsstatementwasinsertedinSection1.2editoriallyinJune2015.1.Scope1.1Thesetestmethodscoverthevisualdeterminationofthephysicalappearanceofadmixturescontaininghalogenatedhydrocarbons.Thesetestmethodsarequalitativetestmethods.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.SignificanceandUse2.1Thesetestmethodsareusefulfordeterminingtheappearanceofhalogenatedhydrocarbonsandtheiradmixtures.TESTMETHODA—USINGNESSLERTUBES3.Apparatus3.1ColorComparisonTube,100-mLtall-formNessler.Tubesshouldbeselectedsothattheheightofthe100-mLgraduationmarkis275to295mmabovethebottomofthetubewithgroundglasscap.3.2ViewingStand,constructedtopermitvisualobservationoflighttransmittedthroughtheNesslertubeinthedirectionofitslongitudinalaxis.Theviewingstandshouldbeconstructedsothatwhitelightispassedthroughorreflectedoffawhiteglassplateanddirectedwithuniformintensitythroughthetube,andshouldbeshieldedsothatnolightentersthetubefromtheside.4.Procedure4.1Vigorouslyshakethesampletodistributeanysolidmatterthatmaybedepositedonthebottomofthecontainer.Transferthesampletothetubeandcapthetube.4.2Placethetubeintheviewingstand.Observethesamplethroughthelongitudinaldirectionofthetube,lookingforsuspendedparticles,floaters,sediment,turbidity,foaming,orfreewater.5.Report5.1Reportthefollowingi...
