Designation:D4902−99(Reapproved2009)StandardTestMethodforEvaporationandDryingofAnalyticalSolutions1ThisstandardisissuedunderthefixeddesignationD4902;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversaprocedurefortheevaporatinganddryingofthe100mLportionsofanalyticalsolution,obtainedinthemethodsforvegetabletanninanalysis,sothatconsistentresultsmaybeobtainedforthedeterminationoftotalsolids,solublesolids,andnon-tanninsinthesample.Thistestmethodisalsointendedforuseindeterminingthemoistureinthehidepowdersamplesandthemoistureinrawandspentmaterialsinthemethodsforvegetabletanninanalysis.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D4903TestMethodforTotalSolidsandWaterinVegetableTanningMaterialExtractsD6401TestMethodforDeterminingNon-TanninsandTan-nininExtractsofVegetableTanningMaterialsD6402TestMethodforDeterminingSolubleSolidsandInsolublesinExtractsofVegetableTanningMaterialsD6403TestMethodforDeterminingMoistureinRawandSpentMaterials2.2ALCAMethods:A13EvaporationandDryingofAnalyticalSolutions33.SummaryofTestMethod3.1Thistestmethoddescribesaprocedureforevaporationanddryingofthe100mLportionsoftheanalyticalsolutionobtainedinTestMethodsD4903,D6401,andD6402,sothatconsistentresultsmaybeobtainedforthedeterminationoftotalsolids,solublesolids,andnon-tanninsinthesample.Thistestmethodisalsointendedforuseindeterminingthemoistureintheair-dryandprepared,wet,hidepowdersusedinTestMethodD6401andthemoistureinrawandspentmat...
