Designation:D7622−20StandardTestMethodforTotalMercuryinCrudeOilUsingCombustionandDirectColdVaporAtomicAbsorptionMethodwithZeemanBackgroundCorrection1ThisstandardisissuedunderthefixeddesignationD7622;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoverstheproceduretodeterminethetotalmercurycontentinasampleofcrudeoil.Thistestmethodcanbeusedfortotalmercurydeterminationinnaturalandprocessedliquidandoilproducts(gasoline,naphtha,etc.).1.2Thistestmethodmaybeappliedtosamplescontainingbetween5.0ng⁄mLto350ng⁄mLofmercury.Theresultsmaybeconvertedtomassbasis.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)Commi...
