ANSI/TIA/EIA 568-B.2-4-2002 商用建筑电信电缆敷设标准.第2部分:对称绞线对电缆敷设元件.补充4.铜制连接零件的非钎焊连接可靠性要求
时间:2024-05-10 14:38:32 来源: 标准资料网 作者：标准资料网 阅读：8477
【英文标准名称】:CommercialBuildingTelecommunicationsCablingStandard-Part2:BalancedTwistedPairCablingComponents-Addendum4-SolderlessConnectionReliabilityRequirementsforCopperConnectingHardware
【原文标准名称】:商用建筑电信电缆敷设标准.第2部分:对称绞线对电缆敷设元件.补充4.铜制连接零件的非钎焊连接可靠性要求
【标准号】:ANSI/TIA/EIA568-B.2-4-2002
【标准状态】:现行
【国别】:美国
【发布日期】:2002
【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】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:(SP-3-4426-AD4)Thisstandardspecifiessolderlessconnectionreliabilityrequirementsforcopperconnectinghardwareusedincommercialbuildingtelecommunications.
【中国标准分类号】:P91
【国际标准分类号】:33_040_01;91_140_50
【页数】:
【正文语种】:英语
【英文标准名称】:Workplaceairquality-Determinationoftotalisocyanategroupsinairusing2-(1-methoxyphenyl)piperazineandliquidchromatography
【原文标准名称】:工作场所空气质量用2-(1-甲氧基)酸呱嗪和液相色谱法测定空气中的总异氰酸盐
【标准号】:ISO16702-2001
【标准状态】:作废
【国别】:国际
【发布日期】:2001-05
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC146
【标准类型】:()
【标准水平】:()
【中文主题词】:空气质量;取样;工作地点;色谱法;质量;哌嗪;异氰酸酯;采样设备;扩散样品;含量测定;空气;技术数据单;解吸;空气污染;化学分析和试验;液相色谱法;工作场所安全
【英文主题词】:
【摘要】:ThisInternationalStandardgivesgeneralguidanceforthesamplingandanalysisofairborneorganicisocyanatesinworkplaceair,usingthe2-(1-methoxyphenyl)piperazinereagentandliquidchromatography.ThisInternationalStandardisapplicabletothemeasurementofawiderangeoforganiccompoundscontainingisocyanatefunctionalgroups(NCO),includingisocyanatemonomersandprepolymers.ThisInternationalStandardisapplicabletothemeasurementofanyproductcontainingfreeisocyanategroups.ThisInternationalStandardisapplicabletothemeasurementoftime-weighted-averageconcentrationsoforganicisocyanatesinworkplaceatmospheres,andforsamplingoverperiodsintherange10minto8h.Itisdesignedforpersonalmonitoring,butmayalsobeusedforfixed-locationmonitoringbysuitablemodification.ThisInternationalStandardisapplicabletothemeasurementofairborneorganicisocyanatesintheconcentrationrangeapproximately0,1μgNCO·mto140μgNCO·mfora15Isamplevolume.Thequalitativeandquantitativedetectionlimitsforisocyanate,definedasthreetimesandtentimesthestandarddeviationofsixblankdeterminations,havebeenfoundtobetypicallyaround0,001μgNCOand0,004μgNCOpersamplerespectively(electrochemicaldetection).Fora15Iairsample,thesevaluescorrespondtoqualitativeandquantitativedetectionlimitsof0,07μg·mand0,3μg·mrespectively.EXAMPLESAromaticmonomersincludetoluenediisocyanate(TDI)andmethylenebis(4-phenylisocyanate)(4,4-diisocyanatodiphenylmethane,MDI).Aliphaticmonomersincludeisophoronediisocyanate(IPDI)and1,6-hexamethylenediisocyanate(HDI).Isocyanateoligomersorprepolymersarederivedfromthesemonomersbyself-condensationorreactionwithpolyols.NOTE1Organicisocyanatescanalsoarisefromthermaldecompositionofpolyurethanes.Ifbothisocyanatesandaminesarebelievedtobepresent,useofastandardwhichenablesthesimultaneousdeterminationofbothaminesandisocyanatesmaybemoreappropriate(ISOmethodindraft).AnalternativeprocedureusingtheMAP[1-(9-anthracenylmethyi)piperazine]reagentisalsoavailable(ISOmethodindraft).NOTE2Theobjectiveofairmonitoringisusuallytodetermineworkerexposureand,therefore,theproceduresdescribedinthisInternationalStandardareforpersonalsamplinginthebreathingzone.Theproceduresmaybeusedforbackgroundorfixedlocationsampling.However,itshouldberecognizedthat,duetoaerodynamiceffects,samplersdesignedforpersonalsamplingdonotnecessarilyexhibitthesamecollectioncharacteristicswhenusedforotherpurposes.
【中国标准分类号】:Z15
【国际标准分类号】:13_040_30
【页数】:16P;A4
【正文语种】:英语
【英文标准名称】:ArsenazoI
【原文标准名称】:偶氮砷i
【标准号】:JISK9543-1994
【标准状态】:作废
【国别】:日本
【发布日期】:
【实施或试行日期】:
【发布单位】:日本工业标准调查会(JISC)
【起草单位】:Abolishment
【标准类型】:()
【标准水平】:()
【中文主题词】:化学试剂;磺酸;砷的有机化合物;偶氮化合物;酚类;苯;化学指示剂;萘;萘酚
【英文主题词】:arsenicorganiccompounds;;phenols;naphthalene;naphthols
【摘要】:
【中国标准分类号】:G62
【国际标准分类号】:71_040_30
【页数】:6P;A4
【正文语种】:日语