【英文标准名称】:CorticalBoneScrews
【原文标准名称】:皮质骨螺钉
【标准号】:ASTMF543-1992
【标准状态】:作废
【国别】:美国
【发布日期】:1992
【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】:螺钉;骨螺钉;规范(批准);医学科学;医疗设备
【英文主题词】:medicalsciences;specification(approval);bonescrews;screws(bolts);medicalequipment
【摘要】:
【中国标准分类号】:C35
【国际标准分类号】:11_040_40
【页数】:3P;A4
【正文语种】:英语


【英文标准名称】:Petroleumproductsandrelatedmaterials-Determinationofhydrocarbontypes-Fluorescentindicatoradsorptionmethod
【原文标准名称】:石油产品和相关材料.烃类型的测定.荧光指示剂吸附法
【标准号】:BSEN15553-2007
【标准状态】:现行
【国别】:英国
【发布日期】:2007-05-31
【实施或试行日期】:2007-05-31
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:吸附指示剂;吸附法;芳烃;化合物;含量;定义;测定;含量测定;荧光指示剂;烃类;指示器;数学计算;链烯;石油产品;精密度;饱和烃
【英文主题词】:Adsorptionindicators;Adsorptionmethod;Aromatichydrocarbons;Chemicals;Content;Definitions;Determination;Determinationofcontent;Fluorescentindicators;Hydrocarbons;Indicators;Mathematicalcalculations;Olefins;Petroleumproducts;Precision;Saturatedhydrocarbons
【摘要】:ThisEuropeanStandardspecifiesafluorescentindicatoradsorptionmethodforthedeterminationofhydrocarbontypesovertheconcentrationrangesfrom5%(V/V)to99%(V/V)aromatichydrocarbons,0,3%(V/V)to55%(V/V)olefinichydrocarbons,and1%(V/V)to95%(V/V)saturatedhydrocarbonsinpetroleumfractionsthatdistilbelow315oC.Thismethodmaybeapplicabletoconcentrationsoutsidetheseranges,buttheprecisionhasnotbeendetermined.Whensamplescontainingoxygenatedblendingcomponentsareanalysed,thehydrocarbontyperesultscanbereportedonanoxygenate-freebasisor,whentheoxygenatecontentisknown,theresultscanbecorrectedtoatotal-samplebasis.Thistestmethodisforusewithfullboilingrangeproducts.Cooperativedatahaveestablishedthattheprecisionstatementdoesnotapplytopetroleumfractionswithnarrowboilingrangesnearthe315°Climit.Suchsamplesarenotelutedproperly,andresultsareerratic.Samplescontainingdark-colouredcomponentsthatinterferewithreadingthechromatographicbandscannotbeanalysed.NOTE1Theoxygenatedblendingcomponentsmethanol,ethanol,tert-butylmethylether(MTBE),methyltert-pentylether(TAME)andtert-butylethylether(ETBE)donotinterferewiththedeterminationofhydrocarbontypesatconcentrationsnormallyfoundincommercialblends.Theseoxygenatedcompoundsarenotdetectedsincetheyelutewiththealcoholdesorbent.Theeffectsofotheroxygenatedcompoundsshouldbeindividuallyverified.NOTE2ForthepurposesofthisEuropeanStandard,theterms“%(m/m)”and“%(V/V)”areusedtorepresentrespectivelythemassfractionandthevolumefraction.WARNING—TheuseofthisEuropeanStandardmayinvolvehazardousmaterials,operationsandequipment.ThisEuropeanStandarddoesnotpurporttoaddressallofthesafetyproblemsassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E30
【国际标准分类号】:75_080
【页数】:22P.;A4
【正文语种】:英语