Designation:D6714−01(Reapproved2015)StandardTestMethodforChromicOxideinAshedWetBlue(PerchloricAcidOxidation)1ThisstandardisissuedunderthefixeddesignationD6714;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofchromicoxideinwetbluethathasbeenpartlyorcompletelytannedwithchromiumcompounds.Ingeneralthesampleswillcon-tainchromiumcontentbetween1and5%,calculatedaschromicoxideexpresseduponadrybasisotherwisereferredtoasmoisture-freebasis(mfb).1.2ThistestmethodisspecificinthatitappliestoasampleorsamplesthataretheresultantashfollowingtheexecutionofTestMethodD6716.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.SpecifichazardsaregiveninSection8.2.ReferencedDocuments2.1ASTMStandards:2D6658TestMethodforVolatileMatter(Moisture)ofWetBluebyOvenDryingD6659PracticeforSamplingandPreparationofWetBlueforPhysicalandChemicalTestsD6716TestMethodforTotalAshinWetBlueorWetWhiteE180PracticeforDeterminingthePrecisionofASTMMethodsforAnalysisandTestingofIndustrialandSpe-cialtyChemicals(Withdrawn2009)33.Terminology3.1Definitions—Thetermsanddefinitionsemployedwithinthistestmethodarecommonlyusedinnormallaboratorypracticeandrequirenospecialcomment.4.SummaryofTestMethod4.1TheperchloricacidmethodmaybeappliedtotheashobtainedinTestMethodD6716.Theresultantashisdissolvedintoacidicsolutioninablendofnitricacidandapreparedoxidationmixtureconsistingofsulfuricandperchloricacids.Oncecompleted,oxidationofalltrivalenttohexavalentchromiumisexecutedbycontrolledheating.U...
