Designation:D4904−99(Reapproved2020)StandardPracticeforCoolingofAnalyticalSolutions1ThisstandardisissuedunderthefixeddesignationD4904;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversastandardprocedureforthecool-ingofanalyticalsolutionssuchasthosepreparedinPracticesD4901,D4905,orD6405.Thetanninanalysisresultsforananalyticalsolutionaretosomeextentdependentontheconditionsofthecoolingofthatsolution.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D4901PracticeforPreparationofSolutionofLiquidVeg-etableTanninExtractsD4905PracticeforPreparationofSolutionofSolid,PastyandPowderedVegetableTanninExtractsD6405PracticeforExtractionofTanninsfromRawandSpentMaterials2.2ALCAMethods:A12CoolingofAnalyticalSolutions33.SummaryofPractice3.1ThispracticespecifiesaproceduretofollowincoolingtostandardorroomtemperaturethehotanalyticalsolutionspreparedfromtanningmaterialsforPracticesD4901,D4905,orD6405.4.SignificanceandUse4.1Thesolubilityofextractsisinfluencedbytemperature.Theanalyticalsolutionspreparedfromtanningextractsaredissolvedordilutedinhotwater.Itisnecessarytoexercisecautionincoolingthesesolutions,andtodosoinsuchawayastoavoid...
