ANSI/ASTM D4046-1991 用分光光度法对柴油机燃料中硝酸烷基酯的试验方法
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【英文标准名称】:TestMethodforAlkylNitrateinDieselFuelsbySpectrophotometry(05.02)
【原文标准名称】:用分光光度法对柴油机燃料中硝酸烷基酯的试验方法
【标准号】:ANSI/ASTMD4046-1991
【标准状态】:作废
【国别】:美国
【发布日期】:1991
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:石油产品;含量测定;试验;柴油
【英文主题词】:Alkylcompounds;Determinationofcontent;Dieselfuels;Nitrates;Petroleumproducts;Spectrometry;Testing
【摘要】:Thistestmethodcoversaprocedureforthedeterminationof0.03to0.30volume%ofalkylnitrateindieselfuels.Thistestmethodcanbeusedforthedeterminationofanyalkylnitrateindieselfuelprovidedthatstandardsusedforcalibrationcontainthesamealkylnitrateesterasthetestspecimenstobeanalyzed.ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection7.
【中国标准分类号】:E31
【国际标准分类号】:75_160_20
【页数】:
【正文语种】:英语
【英文标准名称】:StandardTestMethodforMeasurementofRadioFrequencyInducedHeatingNearPassiveImplantsDuringMagneticResonanceImaging
【原文标准名称】:磁共振成像时测量射频感应加热接近被动性植入物的标准试验方法
【标准号】:ASTMF2182-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:F04.15
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:implant;MRI(magneticresonanceimaging);MRsafety;RF(radiofrequency)heating;MRI(magneticresonanceimaging);Passiveimplants;RF-inducedtemperaturerise;RF(radiofrequency)receivers;Specificabsorptionrate(SAR);Wholebodymagneticres
【摘要】:ThistestmethoddescribesatestprocedureforevaluatingtheRF-inducedtemperatureriseassociatedwithanMRprocedureinvolvingaspecificfrequencyofRFirradiationofanimplant.Theheatingmeasurementsaremadetwice,oncewiththeimplantandthenrepeatedatthesamelocationwithouttheimplant.ThesetwomeasurementsestimatethelocalSARandthelocaladditionaltemperaturerisewiththeimplant.Ifthereisasignificanttemperatureriseassociatedwiththeimplant,theresultsmaybeusedasaninputtoacomputationalmodelforestimatingtemperatureriseinapatient.ThecombinationofthetestresultsandthecomputationalmodelresultsmaythenbeprovidedtoregulatorybodiesandphysicianstoassessthesafetyofapatientwiththeimplantduringanMRscan.1.1Thistestmethodcoversmeasurementofradiofrequency(RF)inducedheatingonornearapassivemedicalimplantanditssurroundingsduringmagneticresonanceimaging(MRI).1.2ThistestmethodisoneofthoserequiredtodetermineifthepresenceofapassiveimplantmaycauseinjurytothepatientwiththeimplantduringanMRprocedure.Othersafetyissuesthatshouldbeaddressedincludemagneticallyinduceddisplacementforceandtorque.1.3TheamountofRF-inducedtemperatureriseforagivenspecificabsorptionrate(SAR)willdependontheRFfrequency,whichisdependentonthestaticmagneticfieldstrengthoftheMRsystem.Becauseofpossibleadditionalheating,particularlywhenimplantdimensionsapproachesorexceedsonequarterofthewavelengthoftheRFfieldinsidethephantom,conclusionsfrommeasurementsmadeatonestaticmagneticfieldstrengthdonotapplytootherfieldstrengthsandfrequencies.Whilethefocusinthistestmethodison1.5Tor3TeslacylindricalboreMRsystems,theRF-inducedtemperatureriseforanimplantinopenMRsystemscanbeevaluatedbysuitablemodificationofthemethoddescribedherein.1.4Thistestmethodassumesthattestingisdoneondevicesthatwillbeentirelyinsidethebody.Forotherimplantationconditions(forexample,externalfixationdevices,percutaneousneedles,cathetersortethereddevicessuchasablationprobes),modificationsofthistestmethodarenecessary.1.5Thistestmethodappliestowholebodymagneticresonanceequipment,asdefinedinsection2.2.103oftheIECStandard60601-2-33,Ed.2.0,withawholebodyRFtransmitcoilasdefinedinsection2.2.100.TheRFcoilisassumedtohavequadratureexcitation.1.6ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:C45
【国际标准分类号】:11_040_40
【页数】:12P.;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforPerformanceTestingofExcessFlowValves
【原文标准名称】:溢流阀性能测试标准试验方法
【标准号】:ASTMF1802-1997
【标准状态】:作废
【国别】:美国
【发布日期】:1997
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:overflowvalves;testmethods;valves
【摘要】:
【中国标准分类号】:J16
【国际标准分类号】:23_060_20
【页数】:7P;A4
【正文语种】:英语