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【英文标准名称】:StandardTestMethodforAromaticCarbonContentsofHydrocarbonOilsbyHighResolutionNuclearMagneticResonanceSpectroscopy
【原文标准名称】:用高裂度核磁共振光谱法测定烃类油中芳香碳含量的标准试验方法
【标准号】:ASTMD5292-1999(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:1999
【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】:D02.04.0F
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:aromaticcarboncontent;aromatichydrogencontent;continuouswave;Fouriertransform;hydrocarbonoils;NMR;nuclearmagneticresonancespectroscopy;Aromaticcompounds;Aromatichydrocarbons(AHs);Aromatichydrogen/carboncontent;Carboncontent
【摘要】:Aromaticcontentisakeycharacteristicofhydrocarbonoilsandcanaffectavarietyofpropertiesoftheoilincludingitsboilingrange,viscosity,stability,andcompatibilityoftheoilwithpolymers.Existingmethodsforestimatingaromaticcontentsusephysicalmeasurements,suchasrefractiveindex,density,andnumberaveragemolecularweight(seeTestMethodD3238)orinfraredabsorbanceandoftendependontheavailabilityofsuitablestandards.TheseNMRproceduresdonotrequirestandardsofknownaromatichydrogenoraromaticcarboncontentsandareapplicabletoawiderangeofhydrocarbonoilsthatarecompletelysolubleinchloroformatambienttemperature.Thearomatichydrogenandaromaticcarboncontentsdeterminedbythistestmethodcanbeusedtoevaluatechangesinaromaticcontentsofhydrocarbonoilsduetochangesinprocessingconditionsandtodevelopprocessingmodelsinwhichthearomaticcontentofthehydrocarbonoilisakeyprocessingindicator.1.1Thistestmethodcoversthedeterminationofthearomatichydrogencontent(ProceduresAandB)andaromaticcarboncontent(ProcedureC)ofhydrocarbonoilsusinghigh-resolutionnuclearmagneticresonance(NMR)spectrometers.Applicablesamplesincludekerosenes,gasoils,mineraloils,lubricatingoils,coalliquids,andotherdistillatesthatarecompletelysolubleinchloroformatambienttemperature.ForpulseFouriertransform(FT)spectrometers,thedetectionlimitistypically0.1mol%aromatichydrogenatomsand0.5mol%aromaticcarbonatoms.Forcontinuouswave(CW)spectrometers,whicharesuitableformeasuringaromatichydrogencontentsonly,thedetectionlimitisconsiderablyhigherandtypically0.5mol%aromatichydrogenatoms.1.2Thereportedunitsaremolepercentaromatichydrogenatomsandmolepercentaromaticcarbonatoms.1.3Thistestmethodisnotapplicabletosamplescontainingmorethan1mass%olefinicorphenoliccompounds.1.4ThistestmethoddoesnotcoverthedeterminationofthepercentagemassofaromaticcompoundsinoilssinceNMRsignalsfrombothsaturatedhydrocarbonsandaliphaticsubstituentsonaromaticringcompoundsappearinthesamechemicalshiftregion.Forthedeterminationofmassorvolumepercentaromaticsinhydrocarbonoils,chromatographic,ormassspectrometrymethodscanbeused.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Specificprecautionarystatementsaregivenin7.2and7.3.
【中国标准分类号】:E31
【国际标准分类号】:75_080
【页数】:7P.;A4
【正文语种】:英语


Product Code:SAE AS14101
Title:Bearing, Plain, Self-Lubricating, Self-Aligning, Low Speed, Narrow, Grooved Race, -65Md to 325Mdf
Issuing Committee:Acbg Plain Bearing Committee
Scope:No scope available.