Designation:D4903−99(Reapproved2009)StandardTestMethodforTotalSolidsandWaterinVegetableTanningMaterialExtracts1ThisstandardisissuedunderthefixeddesignationD4903;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodisintendedforuseindeterminingthetotalsolidsandwaterinextractsofvegetabletanningmateri-als.Thetestmethodisapplicabletosolutionsofliquid,solid,pasty,andpowderedextractsandtoextractsofraworspentmaterials.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D4901PracticeforPreparationofSolutionofLiquidVeg-etableTanninExtractsD4902TestMethodforEvaporationandDryingofAnalyti-calSolutionsD4905PracticeforPreparationofSolutionofSolid,PastyandPowderedVegetableTanninExtractsD6401TestMethodforDeterminingNon-TanninsandTan-nininExtractsofVegetableTanningMaterialsD6402TestMethodforDeterminingSolubleSolidsandInsolublesinExtractsofVegetableTanningMaterialsD6404PracticeforSamplingVegetableMaterialsContain-ingTanninD6405PracticeforExtractionofTanninsfromRawandSpentMaterials2.2ALCAMethods:A20TotalSolidsandWater33.SummaryofTestMethod3.1Analiquotofthepreparedanalyticalsolutionispipettedintoanevaporatingdishandevaporatedtodrynessinaforcedairoven.4.SignificanceandUse4.1Thetestmethodisusefulindeterminingthetotalsolidsandwaterinanalyticalsolutions.5.Apparatus5.1TanninDish—Crystallizingdish,borosilicateglass,50mmtall,70mmoutsidediameter.Thebottomcornershallberoundedtoaradiusof6mm,thebottomshallbeflatandnotcuppedinthecenter,andthetopedgeshallberoundedandpolished.5.2Pipet,100-mLcapacity,preferablywithawideorificeapproximately2.4mm(3...
