Designation:D7623−20StandardTestMethodforTotalMercuryinCrudeOilUsingCombustion-GoldAmalgamationandColdVaporAtomicAbsorptionMethod1ThisstandardisissuedunderthefixeddesignationD7623;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoverstheprocedurestodeterminethetotalmercurycontentinasampleofcrudeoil.1.2Thetestmethodmaybeappliedtocrudeoilsamplescontainingbetween5ng⁄mLto400ng⁄mLofmercury.Theresultsmaybeconvertedtomassbasis,andreportedasng/gofmercury.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisworkhasbeenpublishedin“DeterminationofMercuryinCrudeOilbyAtomicSpectroscopy.”21.5WARNING—Mercuryhasbeendesignatedbymanyregulatoryagenciesasahazardoussubstancethatcancauseseriousmedicalissues.Mercury,oritsvapor,hasbeendem-onstratedtobehazardoustohealthandcorrosivetomaterials.UseCautionwhenhandlingmercuryandmercury-containingproducts.SeetheapplicableproductSafetyDataSheet(SDS)foradditionalinformation.Thepotentialexiststhatsellingmercuryormercury-containingproducts,orboth,isprohibitedbylocalornationallaw.Usersmustdeterminelegalityofsalesintheirlocation.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.7Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:3D1193SpecificationforReagentWaterD4057PracticeforManualSam...
