GB 7943-1987 摄影器材中的滤光镜尺寸
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基本信息
| 标准名称： | 摄影器材中的滤光镜尺寸 |
| 中标分类： | 仪器、仪表 >> 电影、照相、缩微、复印设备 >> 镜头 |
| 替代情况： | 调整为JB/T 8255-1995 |
| 发布日期： | 1900-01-01 |
| 实施日期： | 1988-01-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 4页 |
适用范围
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前言
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目录
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引用标准
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所属分类： 仪器 仪表 电影 照相 缩微 复印设备 镜头
下载地址: 点击此处下载
【英文标准名称】:StandardTestMethodforAnionsinWaterbyChemicallySuppressedIonChromatography
【原文标准名称】:用化学压缩离子色谱法对水中阴离子的标准试验方法
【标准号】:ASTMD4327-2003
【标准状态】:现行
【国别】:
【发布日期】:2003
【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】:D19.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:阴离子;水;色谱法;试验
【英文主题词】:anions;drinkingwater;ionchromatography;reagentwater;wastewater
【摘要】:Ionchromatographyprovidesforbothqualitativeandquantitativedeterminationofsevencommonanions,Fx2212;,Clx2212;,NO2x2212;,HPO4x2212;2,Brx2212;,NO3x2212;,andSO4x2212;2,inthemilligramperlitrerangefromasingleanalyticaloperationrequiringonlyafewmillilitresofsampleandtakingapproximately10to15minforcompletion.Note28212;ThistestmethodmaybeusedtodeterminefluorideifitspeakisinthewaterdipbyaddingonemLofeluent(at100x00D7;theconcentrationin8.3)toall100-mLvolumesofsamplesandstandardstonegatetheeffectofthewaterdip.(See6.3,andalsosee6.4.)Thequantitationofunretainedpeaksshouldbeavoided.Anionssuchaslowmolecularweightorganicacids(formate,acetate,propionate,etc.)thatareconductivecoelutewithfluorideandwouldbiasfluoridequantitationinsomedrinkingwatersandmostwastewaters.AnioncombinationssuchasClx2212;/Brx2212;andNO2x2212;/NO3x2212;,whichmaybedifficulttodistinguishbyotheranalyticalmethods,arereadilyseparatedbyionchromatography.1.1Thistestmethodcoversthesequentialdeterminationoffluoride,chloride,nitrite,ortho-phosphate,bromide,nitrate,andsulfateionsinwaterbychemicallysuppressedionchromatography.Note1Orderofelutionisdependentuponthecolumnused;see.1.2Thistestmethodisapplicabletodrinkingandwastewaters.Therangestestedforthistestmethodforeachanionwereasfollows(measuredinmg/L):Fluoride0.26to8.49Chloride0.78to26.0Nitrite-N0.36to12.0Bromide0.63to21.0Nitrate-N0.42to14.0o-Phosphate0.69to23.1Sulfate2.85to95.0【英文标准名称】:StandardGuideforMixedFlowingGas(MFG)TestsforElectricalContacts
【原文标准名称】:电触点的混流气体试验用标准指南
【标准号】:ASTMB845-1997(2008)e1
【标准状态】:现行
【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(US-ASTM)
【起草单位】:B02.11
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:acceleratedtest;airvelocity;atmosphericcorrosion;chlorine;connector;corrosion;corrosivegastesting;electricalcontacts;environmental;humidity;hydrogensulfide;mixedflowinggas;nitrogendioxide;pollutant;reliability;sulfur;sulfurdioxi
【摘要】:Preservationofaconductingsurfaceonelectricalcontactisvitaltothecontinuedfunctioningofsuchcontacts.Contaminationofthesurfacewithinsulatinglayersformedbycorrosionprocessesisonepotentialhazard.LaboratorytestingofcontactsinMFGtestsisusedtoassesstheeffectivenessofdesignfeaturesandmaterials.MFGtestsareusedindevelopmentstudiesofprocessesandmaterialsforcontacts.Forexample,couponspecimensmaybeexposedtoMFGteststoevaluatenewcontactmaterials,layersofnewcoatingmaterialsonasupportingsubstrate,reducedcoatingthicknesses,orprotectivesurfacetreatments.MFGtestsarealsoemployedtotestthedurabilityofafinishedproductwithrespecttoatmosphericcorrosion.Forexample,finishedconnectorsmaybeexposedtoaMFGtestandtheirperformancescomparedagainsteachotheroragainstasetoffixedrequirements.Relaysorswitchcontactsmaybeexposedintheoperatedandnon-operatedconditionstocompareperformance.MFGtestsareusefulfordeterminingtheeffectivenessofconnectorhousingsandshroudsasbarrierstoingressofatmosphericcorrodantstothecontactsurfaces.Thesetestscanalsobeusedtoassessthescreeningofthemetal-to-metalcontactareasofmatedconnectors.MFGtestsareemployedasqualificationteststodetermineconnectorfailureratesinapplicationenvironmentsforwhichcorrelationbetweentestandapplicationhaspreviouslybeenestablished.ThisguideprovidestestconditionswhicharetobeappliedinconjunctionwithPracticeB827whichdefinestherequiredtestoperationandcertificationprocedures,tolerances,andreportingrequirements.WherethetestspecifierrequirescertificationsortolerancesdifferentthanthoseprovidedinPracticeB827,therequiredcertificationsortolerancesshallbepartofthetestspecification.DifferencesfromthespecificationsinPracticeB827shallbereportedinthetestreportprovidedbythetestoperatortothetestspecifier.Specificationofoneofthetestconditionsdefinedinthisdocumentintheformofastatementsuchas,x201C;PartsshallbetestedinaccordancewithASTMB845MethodZ.x201D;,implicitlyrequirestestcondition,Z,appliedaccordingtoPracticeB827.1.1Thetechniquesdescribedinthisguidepertaintomixedflowinggas(MFG)testscontainingspeciesthatareappliedtoevaluatedevicescontainingelectricalcontactssuchassliprings,separableconnectors,electromechanicalrelaysorswitchcontacts.Thesetechniquesmayberelevanttootherdevices,butitistheresponsibilityoftheusertodeterminesuitabilitypriortotesting.1.2TheMFGtestsdescribedinthisguidearedesignedtoacceleratecorrosivedegradationprocesses.Theseaccelerationsaredesignedsuchthatthedegradationoccursinamuchshortertimeperiodthanthatexpectedforsuchprocessesintheintendedapplicationenvironmentofthedevicebeingtested.Applicationenvironmentscanvarycontinuouslyfrombenigntoaggressivelycorrosive.Connectorsandcontactswithinclosedelectroniccabinetsmaybeaffectedbyanenvironmentofdifferentseveritythantheenvironmentontheoutsideofsuchcabinets.Ingeneral,indoorenvironmentsaredifferentthanoutdoorenvironments.TheMFGtestsdescribedherein,beingdiscreteembodimentsofspecificcorrosiveconditions,cannotberepresentativeofallpossibleapplicationenvironments.Itistheresponsibilityofthetestspecifiertoassurethepertinenceofagiventestconditiontothespecifier''sapplicationcondition.1.3TheMFGtestsdescribedhereinarenotd......
【中国标准分类号】:K14
【国际标准分类号】:29_120_20
【页数】:11P.;A4
【正文语种】:英语
【原文标准名称】:用化学压缩离子色谱法对水中阴离子的标准试验方法
【标准号】:ASTMD4327-2003
【标准状态】:现行
【国别】:
【发布日期】:2003
【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】:D19.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:阴离子;水;色谱法;试验
【英文主题词】:anions;drinkingwater;ionchromatography;reagentwater;wastewater
【摘要】:Ionchromatographyprovidesforbothqualitativeandquantitativedeterminationofsevencommonanions,Fx2212;,Clx2212;,NO2x2212;,HPO4x2212;2,Brx2212;,NO3x2212;,andSO4x2212;2,inthemilligramperlitrerangefromasingleanalyticaloperationrequiringonlyafewmillilitresofsampleandtakingapproximately10to15minforcompletion.Note28212;ThistestmethodmaybeusedtodeterminefluorideifitspeakisinthewaterdipbyaddingonemLofeluent(at100x00D7;theconcentrationin8.3)toall100-mLvolumesofsamplesandstandardstonegatetheeffectofthewaterdip.(See6.3,andalsosee6.4.)Thequantitationofunretainedpeaksshouldbeavoided.Anionssuchaslowmolecularweightorganicacids(formate,acetate,propionate,etc.)thatareconductivecoelutewithfluorideandwouldbiasfluoridequantitationinsomedrinkingwatersandmostwastewaters.AnioncombinationssuchasClx2212;/Brx2212;andNO2x2212;/NO3x2212;,whichmaybedifficulttodistinguishbyotheranalyticalmethods,arereadilyseparatedbyionchromatography.1.1Thistestmethodcoversthesequentialdeterminationoffluoride,chloride,nitrite,ortho-phosphate,bromide,nitrate,andsulfateionsinwaterbychemicallysuppressedionchromatography.Note1Orderofelutionisdependentuponthecolumnused;see.1.2Thistestmethodisapplicabletodrinkingandwastewaters.Therangestestedforthistestmethodforeachanionwereasfollows(measuredinmg/L):Fluoride0.26to8.49Chloride0.78to26.0Nitrite-N0.36to12.0Bromide0.63to21.0Nitrate-N0.42to14.0o-Phosphate0.69to23.1Sulfate2.85to95.0【英文标准名称】:StandardGuideforMixedFlowingGas(MFG)TestsforElectricalContacts
【原文标准名称】:电触点的混流气体试验用标准指南
【标准号】:ASTMB845-1997(2008)e1
【标准状态】:现行
【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(US-ASTM)
【起草单位】:B02.11
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:acceleratedtest;airvelocity;atmosphericcorrosion;chlorine;connector;corrosion;corrosivegastesting;electricalcontacts;environmental;humidity;hydrogensulfide;mixedflowinggas;nitrogendioxide;pollutant;reliability;sulfur;sulfurdioxi
【摘要】:Preservationofaconductingsurfaceonelectricalcontactisvitaltothecontinuedfunctioningofsuchcontacts.Contaminationofthesurfacewithinsulatinglayersformedbycorrosionprocessesisonepotentialhazard.LaboratorytestingofcontactsinMFGtestsisusedtoassesstheeffectivenessofdesignfeaturesandmaterials.MFGtestsareusedindevelopmentstudiesofprocessesandmaterialsforcontacts.Forexample,couponspecimensmaybeexposedtoMFGteststoevaluatenewcontactmaterials,layersofnewcoatingmaterialsonasupportingsubstrate,reducedcoatingthicknesses,orprotectivesurfacetreatments.MFGtestsarealsoemployedtotestthedurabilityofafinishedproductwithrespecttoatmosphericcorrosion.Forexample,finishedconnectorsmaybeexposedtoaMFGtestandtheirperformancescomparedagainsteachotheroragainstasetoffixedrequirements.Relaysorswitchcontactsmaybeexposedintheoperatedandnon-operatedconditionstocompareperformance.MFGtestsareusefulfordeterminingtheeffectivenessofconnectorhousingsandshroudsasbarrierstoingressofatmosphericcorrodantstothecontactsurfaces.Thesetestscanalsobeusedtoassessthescreeningofthemetal-to-metalcontactareasofmatedconnectors.MFGtestsareemployedasqualificationteststodetermineconnectorfailureratesinapplicationenvironmentsforwhichcorrelationbetweentestandapplicationhaspreviouslybeenestablished.ThisguideprovidestestconditionswhicharetobeappliedinconjunctionwithPracticeB827whichdefinestherequiredtestoperationandcertificationprocedures,tolerances,andreportingrequirements.WherethetestspecifierrequirescertificationsortolerancesdifferentthanthoseprovidedinPracticeB827,therequiredcertificationsortolerancesshallbepartofthetestspecification.DifferencesfromthespecificationsinPracticeB827shallbereportedinthetestreportprovidedbythetestoperatortothetestspecifier.Specificationofoneofthetestconditionsdefinedinthisdocumentintheformofastatementsuchas,x201C;PartsshallbetestedinaccordancewithASTMB845MethodZ.x201D;,implicitlyrequirestestcondition,Z,appliedaccordingtoPracticeB827.1.1Thetechniquesdescribedinthisguidepertaintomixedflowinggas(MFG)testscontainingspeciesthatareappliedtoevaluatedevicescontainingelectricalcontactssuchassliprings,separableconnectors,electromechanicalrelaysorswitchcontacts.Thesetechniquesmayberelevanttootherdevices,butitistheresponsibilityoftheusertodeterminesuitabilitypriortotesting.1.2TheMFGtestsdescribedinthisguidearedesignedtoacceleratecorrosivedegradationprocesses.Theseaccelerationsaredesignedsuchthatthedegradationoccursinamuchshortertimeperiodthanthatexpectedforsuchprocessesintheintendedapplicationenvironmentofthedevicebeingtested.Applicationenvironmentscanvarycontinuouslyfrombenigntoaggressivelycorrosive.Connectorsandcontactswithinclosedelectroniccabinetsmaybeaffectedbyanenvironmentofdifferentseveritythantheenvironmentontheoutsideofsuchcabinets.Ingeneral,indoorenvironmentsaredifferentthanoutdoorenvironments.TheMFGtestsdescribedherein,beingdiscreteembodimentsofspecificcorrosiveconditions,cannotberepresentativeofallpossibleapplicationenvironments.Itistheresponsibilityofthetestspecifiertoassurethepertinenceofagiventestconditiontothespecifier''sapplicationcondition.1.3TheMFGtestsdescribedhereinarenotd......
【中国标准分类号】:K14
【国际标准分类号】:29_120_20
【页数】:11P.;A4
【正文语种】:英语
