Designation:D4903−99(Reapproved2020)StandardTestMethodforTotalSolidsandWaterinVegetableTanningMaterialExtracts1ThisstandardisissuedunderthefixeddesignationD4903;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodisintendedforuseindeterminingthetotalsolidsandwaterinextractsofvegetabletanningmateri-als.Thetestmethodisapplicabletosolutionsofliquid,solid,pasty,andpowderedextracts,andtoextractsofraworspentmaterials.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.3Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D4901PracticeforPreparationofSolutionofLiquidVeg-etableTanninExtractsD4902TestMethodforEvaporationandDryingofAnalyti-calSolutionsD4905PracticeforPreparationofSolutionofSolid,PastyandPowderedVegetableTanninExtractsD6401TestMethodforDeterminingNon-TanninsandTan-nininExtractsofVegetableTanningMaterialsD6402TestMethodforDeterminingSolubleSolidsandInsolublesinExtractsofVegetableTanningMaterialsD6404PracticeforSamplingVegetableMaterialsContain-ingTanninD6405PracticeforExtractionofTanninsfromRawandSpentMaterials2.2ALCAMethods:A20TotalSolidsandWater33.SummaryofTestMethod3.1Analiquotofthepreparedanalyticalsolutionispipettedintoanevaporatingdishandevaporatedtodrynessinaforcedairoven.4.SignificanceandUse4.1Thistestmethodisusefulindeterminingthetotalsolidsandwaterinanalyti...
