Designation:D6350−14StandardTestMethodforMercurySamplingandAnalysisinNaturalGasbyAtomicFluorescenceSpectroscopy1ThisstandardisissuedunderthefixeddesignationD6350;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftotalmercuryinnaturalgasstreamsdownto0.001µg/m3.Itincludesprocedurestobothobtainingarepresentativesampleandtheatomicfluorescencedetectionoftheanalyte.Thisprocedurecanbeappliedforbothorganicandinorganicmercurycompounds.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.2.1Exception:Inch-poundunitsareusedinSections5.1.2and7.3whendiscussingpressureregulatorusage.1.3Warning:Mercuryhasbeendesignatedbymanyregu-latoryagenciesasahazardousmaterialthatcancauseseriousmedicalissues.Mercury,oritsvapor,hasbeendemonstratedtobehazardoustohealthandcorrosivetomaterials.Cautionshouldbetakenwhenhandlingmercuryandmercurycontain-ingproducts.SeetheapplicableproductSafetyDataSheet(SDS)foradditionalinformation.Usersshouldbeawarethatsellingmercuryand/ormercurycontainingproductsintoyourstateorcountrymaybeprohibitedbylaw.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortoitsuse.2.ReferencedDocuments2.1ASTMStandards:2D5954TestMethodforMercurySamplingandMeasure-mentinNaturalGasbyAtomicAbsorptionSpectroscopy2.2ISOStandard3ISO6978DeterminationofMercuryinNaturalGas3.SummaryofTestMethod3.1Mercuryfromthegaseousstreamisabsorbedandpreconcentratedontoagold-coatedsilicasandtrap.Theanalyteisdesorbedbyraisingthetemperatureofthetrap,andaflowofinertgascarriesthemercuryatomsintothecellassemblyofanatomicfluore...
