【英文标准名称】:Low-voltageswitchgearandcontrolgear;part5-1:controlcircuitdevicesandswitchingelements;electromechanicalcontrolcircuitdevices(IEC60947-5-1:1990);germanversionEN60947-5-1:1991
【原文标准名称】:低压配电仪表.第5-1部分:控制器和开关元件.机电控制器
【标准号】:DINVDE0660T.200-1992
【标准状态】:作废
【国别】:
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【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:
【国际标准分类号】:
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【英文标准名称】:StandardTestMethodforDeterminationofSulfurCompoundsinNaturalGasandGaseousFuelsbyGasChromatographyandChemiluminescence
【原文标准名称】:用气相色谱和化学发光法测定天然气和气体燃料中硫化物含量的标准试验方法
【标准号】:ASTMD5504-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:
【英文主题词】:chemiluminescencedetection;gaschromatography;sulfurcompounds;Chemiluminescencedetection;Fuelsulfur;Gaschromatography(GC)--petroleumproducts;Gaseousfuels;Naturalgasservicesystems;Reactivesulfurcompounds
【摘要】:Manysourcesofnaturalandpetroleumgasescontainsulfurcompoundsthatareodorous,corrosive,andpoisonoustocatalystsusedingaseousfuelprocessing.LowppmamountsofsulfurodorantsareaddedtonaturalgasandLPgasesforsafetypurposes.Someodorantsareunstableandreacttoformcompoundshavinglowerodorthresholds.Quantitativeanalysisoftheseodorizedgasesensuresthatodorantinjectionequipmentisperformingtospecification.Althoughnotintendedforapplicationtogasesotherthannaturalgasandrelatedfuels,thistestmethodhasbeensuccessfullyappliedtofueltypegasesincludingrefinery,landfill,cogeneration,andsewagedigestergas.Refinery,landfill,sewagedigesterandotherrelatedfueltypegasesinherentlycontainvolatilesulfurcompoundsthataresubjecttofederal,state,orlocalcontrol.Themethanefractionofthesefueltypegasesareoccasionallysoldtodistributorsofnaturalgas.Forthesereasons,bothregulatoryagenciesandproductionanddistributionfacilitiesmayrequiretheaccuratedeterminationofsulfurtosatisfyregulatory,productionordistributionrequirements.Fuelgasesarealsousedinenergyproductionorareconvertedtonewproductsusingcatalyststhatarepoisonedbyexcessivesulfurinthefeedgas.Industryfrequentlyrequiresmeasurementofsulfurinthesefueltypegasestoprotecttheircatalystinvestments.AnalyticalMethods8212;Gaschromatography(GC)iscommonlyusedinthedeterminationoffixedgasandorganiccompositionofnaturalgas(TestMethodD1945).OtherstandardASTMmethodsfortheanalysisofsulfurinfuelgasesincludeTestMethodsD1072andD4468fortotalsulfurandTestMethodsD4010andD4884forhydrogensulfide.1.1Thistestmethodisprimarilyforthedeterminationofspeciatedvolatilesulfur-containingcompoundsinhighmethanecontentgaseousfuelssuchasnaturalgas.Ithasbeensuccessfullyappliedtoothertypesofgaseoussamplesincludingair,digester,landfill,andrefineryfuelgas.Thedetectionrangeforsulfurcompounds,reportedaspicogramssulfur,isten(10)toonemillion(1000000).Thisisequivalentto0.01to1000mg/m3,basedupontheanalysisofa1ccsample.1.2Therangeofthistestmethodmaybeextendedtohigherconcentrationbydilutionorbyselectionofasmallersampleloop.Note18212;Dilutionwillreducemethodprecision.1.3Thistestmethoddoesnotpurporttoidentifyallsulfurspeciesinasample.Onlycompoundsthatareelutedthroughtheselectedcolumnunderthechromatographicconditionschosenaredetermined.Thedetectorresponsetosulfurisequimolarforallsulfurcompoundswithinthescope(1.1)ofthistestmethod.Thus,unidentifiedcompoundsaredeterminedwithequalprecisiontothatofidentifiedsubstances.Totalsulfurcontentisdeterminedfromthetotalofindividuallyquantifiedcomponents.1.4ThevaluesstatedinSIunitsarestandard.Thevaluesstatedininch-poundunitsareforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E24
【国际标准分类号】:75_160_30
【页数】:10P.;A4
【正文语种】:英语