Designation:D2420−13(Reapproved2018)StandardTestMethodforHydrogenSulfideinLiquefiedPetroleum(LP)Gases(LeadAcetateMethod)1ThisstandardisissuedunderthefixeddesignationD2420;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethod2coversthedetectionofhydrogensulfideinliquefiedpetroleum(LP)gases.Thesensitivityofthetestisabout4mg⁄m3(0.15to0.2grainofhydrogensulfideper100ft3)ofgas.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesafterSIunitsareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:3D1193SpecificationforReagentWaterD1265PracticeforSamplingLiquefiedPetroleum(LP)Gases,ManualMethodD1835SpecificationforLiquefiedPetroleum(LP)Gases2.2GPAStandard:4GPA2140LiquefiedPetroleumGasSpecificationsandTestMethods3.SummaryofTestMethod3.1VaporizedLPgasispassedovermoistleadacetatepaperundercontrolledconditions.Hydrogensulfidereactswithleadacetatetoformleadsulfidewhichproducesacolorationonthepapervaryingfromyellowtoblack,dependingupontheamountofhydrogensulfidepresent.4.SignificanceandUse4.1Liquefiedpetroleumgasesandtheirproductsofcom-bustionmustnotbeundulycorrosivetothematerialswithwhichtheycomeincontact.ThepotentialpersonnelexposurehazardsofH2Salsomaket...
