Designation:D6407−99(Reapproved2014)StandardTestMethodforAnalysisofIronandCopperinVegetableTanningMaterials1ThisstandardisissuedunderthefixeddesignationD6407;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodisintendedforuseindeterminingironandcoppercontentinvegetabletanningmaterials.Thistestmethodisapplicabletoliquid,solid,pastyandpowderedextracts,torawandspentmaterials,andtotanneryliquors.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D4901PracticeforPreparationofSolutionofLiquidVeg-etableTanninExtractsD4902TestMethodforEvaporationandDryingofAnalyti-calSolutionsD6404PracticeforSamplingVegetableMaterialsContain-ingTanninD6405PracticeforExtractionofTanninsfromRawandSpentMaterials2.2ALCAMethods:A31MethodforCopperandIroninTanningMaterials33.SummaryofTestMethod3.1Aspecifiedquantityofthetanningmaterialisanalyzedforironandcopperandcontent.4.SignificanceandUse4.1ThistestmethodisusedtodeterminethequantityofironandcopperpresentinvegetabletanningmaterialsorvegetabletanninextractspreparedusingPracticesD4901,D6404,orD6405.4.2Becauseofthepossibilityoferrorsinthistestmethoditisessentialthatthemethodbefollowedexactlyinordertoobtainreproducibleresultsbothamongspecimenswithinalaboratoryandforanalysesbetweenlaboratories.5.ApparatusandReagents5.1SulfuricAcid,concentrated(96%).5.2SulfuricAcidSolution,diluted1:20withdistilledwater.5.3NitricAcid,fuming.5.4HydrochloricAcid,concentrated(36%).5.5HydrochloricAcidSolution,0.1N.5....
