Designation:D2331−08(Reapproved2022)StandardPracticesforPreparationandPreliminaryTestingofWater-FormedDeposits1ThisstandardisissuedunderthefixeddesignationD2331;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thesepracticesprovidedirectionsforthepreparationofthesampleforanalysis,thepreliminaryexaminationofthesample,andmethodsfordissolvingtheanalyticalsampleorselectivelyseparatingconstituentsofconcern.1.2Thegeneralpracticesgivenherecanbeappliedtoanalysisofsamplesfromavarietyofsurfacesthataresubjecttowater-formeddeposits.However,theinvestigatormustresorttoindividualexperienceandjudgementinapplyingtheseprocedurestospecificproblems.1.3Thepracticesincludethefollowing:SectionsPreparationoftheAnalyticalSample8PreliminaryTestingoftheAnalyticalSample9DissolvingtheAnalyticalSample101.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.Foraspecificwarningstatement,seeNote2.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D887PracticesforSamplingWater-FormedDepositsD932PracticeforFilamentousIronBacteriainWaterandWater-FormedDepositsD933PracticeforReportingResultsofExaminationandAnalysisofWater-FormedDepositsD934PracticesforIdentificationofCrystallineCompoundsinWater-FormedDepositsByX-RayD...
