【英文标准名称】:Ammoniumnitrateforindustrialuse;Determinationofmatterinsolubleinwater;Gravimetricmethod
【原文标准名称】:工业用硝酸铵水不溶物测定重量法
【标准号】:ISO2995-1974
【标准状态】:作废
【国别】:国际
【发布日期】:1974-04
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC47
【标准类型】:()
【标准水平】:()
【中文主题词】:化学制品;铵无机化合物;含量测定;化学分析和试验;化学分析;铵化合物;硝酸铵;重量分析
【英文主题词】:gravimetricanalysis;determinationofcontent;ammoniumnitrate;chemicals;chemicalanalysisandtesting;ammoniuminorganiccompounds
【摘要】:Specifiesthedissolutionofatestportioninwater;filtrationundervacuumonthefiltercrucible,thoroughwashingofthefiltercrucibleanddryingofthecrucibleinanovenat(1105)C0,weighingoftheinsolubleresidue.HasalsobeenapprovedbytheIUPAC.
【中国标准分类号】:G10
【国际标准分类号】:71_060_50
【页数】:2P;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodforWaterVaporContentofGaseousFuelsbyMeasurementofDew-PointTemperature
【原文标准名称】:露点温度法测定气体燃料中蒸汽含量的标准试验方法
【标准号】:ASTMD1142-1995(2006)
【标准状态】:现行
【国别】:
【发布日期】:1995
【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】:蒸汽;测量;试验;燃料;露点温度;气体燃料;含量测定
【英文主题词】:gaseousfuels;naturalgas
【摘要】:Generally,contractsgoverningthepipelinetransmissionofnaturalgascontainspecificationslimitingthemaximumconcentrationofwatervaporallowed.Excesswatervaporcancausecorrosiveconditions,degradingpipelinesandequipment.Itcanalsocondenseandfreezeorformmethanehydratescausingblockages.Waterx2013;vaporcontentalsoaffectstheheatingvalueofnaturalgas,thusinfluencingthequalityofthegas.Thistestmethodpermitsthedeterminationofwatercontentofnaturalgas.1.1Thistestmethodcoversthedeterminationofthewatervaporcontentofgaseousfuelsbymeasurementofthedew-pointtemperatureandthecalculationtherefromofthewatervaporcontent.Note1Somegaseousfuelscontainvaporsofhydrocarbonsorothercomponentsthateasilycondenseintoliquidandsometimesinterferewithormaskthewaterdewpoint.Whenthisoccurs,itissometimesveryhelpfultosupplementtheapparatusinwithanopticalattachmentthatuniformlyilluminatesthedew-pointmirrorandalsomagnifiesthecondensateonthemirror.Withthisattachmentitispossible,insomecases,toobserveseparatecondensationpointsofwatervapor,hydrocarbons,andglycolaminesaswellasicepoints.However,ifthedewpointofthecondensablehydrocarbonsishigherthanthewatervapordewpoint,whensuchhydrocarbonsarepresentinlargeamounts,theymayfloodthemirrorandobscureorwashoffthewaterdewpoint.Bestresultsindistinguishingmultiplecomponentdewpointsareobtainedwhentheyarenottoocloselyspaced.Note2Condensationofwatervaporonthedew-pointmirrormayappearasliquidwaterattemperaturesaslowas0to10F(18to23C).Atlowertemperaturesanicepointratherthanawaterdewpointlikelywillbeobserved.Theminimumdewpointofanyvaporthatcanbeobservedislimitedbythemechanicalpartsoftheequipment.Mirrortemperaturesaslowas150F(100C)havebeenmeasured,usingliquidnitrogenasthecoolantwithathermocoupleattachedtothemirror,insteadofathermometerwell.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E30
【国际标准分类号】:75_160_30
【页数】:11P.;A4
【正文语种】: