Product Code:SAE AS9596
Title:Bracket, Angle, 90Md, Cadmium Plates, Steel Uns G41300, .190 Bolt
Issuing Committee:E-25 General Standards For Aerospace And Propulsion Systems
Scope:No scope available.【英文标准名称】:StandardTestMethodforDeterminationofSulfurCompoundsinNaturalGasandGaseousFuelsbyGasChromatographyandFlamePhotometricDetection
【原文标准名称】:用气相色谱和火焰光度检测对天然气和气态燃料中含硫化合物测定的标准试验方法
【标准号】:ASTMD6228-1998(2003)
【标准状态】:现行
【国别】:
【发布日期】:1998
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D03.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:火焰光度检测;含硫化合物;加嗅剂;气相色谱法
【英文主题词】:flamephotometricdetection;gaschromatography;sulfurcompounds,odorants
【摘要】:Manysourcesofnaturalgasandpetroleumgasescontainvaryingamountsandtypesofsulfurcompounds,whichareodorous,corrosivetoequipment,andcaninhibitordestroycatalystsusedingasprocessing.Theiraccuratemeasurementisessentialtogasprocessing,operation,andutilization.Smallamounts,typically,1to4ppmvofsulfurodorantcompounds,areaddedtonaturalgasandliquefiedpetroleum(LP)gasesforsafetypurposes.Someodorantcompoundscanbereactiveandmaybeoxidized,formingmorestablecompoundshavinglowerodorthresholds.Thesegaseousfuelsareanalyzedforsulfurodorantstohelpensureappropriateodorantlevelsforsafety.Thistestmethodoffersatechniquetodetermineindividualsulfurspeciesingaseousfuelandthetotalsulfurcontentbycalculation.Gaschromatographyisusedcommonlyandextensivelytodetermineothercomponentsingaseousfuelsincludingfixedgasandorganiccomponents(seeTestMethodD1945).ThistestmethoddictatestheuseofaspecificGCtechniquewithoneofthemorecommondetectorsformeasurement.1.1Thistestmethodcoversthedeterminationofindividualvolatilesulfur-containingcompoundsingaseousfuelsbygaschromatography(GC)withflamephotometricdetection(FPD).Thedetectionrangeforsulfurcompoundsisfrom20to20000picograms(pg)ofsulfur.Thisisequivalentto0.02to20mg/m3or0.014to14ppmvofsulfurbasedupontheanalysisofa1-mLsample.1.2ThistestmethoddescribesaGC-FPDmethodusingaspecificcapillaryGCcolumn.OtherGC-FPDmethods,withdifferencesinGCcolumnandequipmentsetupandoperation,maybeusedasalternativemethodsforsulfurcompoundanalysiswithdifferentrangeandprecision,providedthatappropriateseparationofthesulfurcompoundsofinterestcanbeachieved.1.3Thistestmethoddoesnotintendtoidentifyallindividualsulfurspecies.Totalsulfurcontentofsamplescanbeestimatedfromthetotaloftheindividualcompoundsdetermined.Unknowncompoundsarecalculatedasmonosulfur-containingcompounds.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesstatedininch-poundunitsareforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E24
【国际标准分类号】:
【页数】:6P.;A4
【正文语种】: