【英文标准名称】:Reinforcedplasticsbasedonunsaturatedpolyesterresins;Determinationofresidualstyrenemonomercontent
【原文标准名称】:以不饱和聚酯树脂为基体的强化塑料剩余苯乙烯单体含量的测定
【标准号】:ISO4901-1985
【标准状态】:作废
【国别】:国际
【发布日期】:1985-09
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC61
【标准类型】:()
【标准水平】:()
【中文主题词】:聚酯;塑料增强材料;苯乙烯;化学分析;含量测定;气相色谱法;聚酯树脂;塑料;化学分析和试验;模制材料
【英文主题词】:Chemicalanalysisandtesting;Determinationofcontent;Gaschromatography;Mouldingmaterials;Mouldings(shapedsection);Plasticreinforcements;Plastics;Polyesterresins;Polyesters;Styrene
【摘要】:Theresidualstyrenemonomercontentinreinforcedplasticsbasedonunsaturatedpolyester(UP)resinsisanimportantcriterioninevaluatingthedegreeofcureofUPresinsinthepolymerizedstate.ThedeterminationiscarriedoutbyextractionoftheresidualmonomerstyrenefromtheUPresininthepolymerizedstateusingdichloromethaneandsubsequentgaschromatographicanalysisoftheextractwithn-butyl-benzeneasinternalstandard.AnalternativemethodofdeterminingtheresidualstyrenemonomerbytheWijsmethodisalsospecified.
【中国标准分类号】:G31
【国际标准分类号】:83_080_10;83_120
【页数】:5P.;A4
【正文语种】:英语
基本信息
| 标准名称： | 端面锪钻用刀杆 |
| 中标分类： |
|
| 发布日期： | 1978-05-24 |
| 实施日期： | 1978-08-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
| 页数： | 1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：
【英文标准名称】:StandardGuideforUseofLightinginLaboratoryTesting
【原文标准名称】:实验室试验照明的标准指南
【标准号】:ASTME1733-1995(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:1995
【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】:E47.06
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:actionspectrum;artificiallighting;simulatedsolarradiation;spectraldistribution;sunlight;ultravioletradiation;visiblelight;Actionspectrum;Artificiallight;Contamination;Irradiance/irradiation;Laboratoryapparatus;Lightexposure;L
【摘要】:Theinformationinthisguideisdesignedtoallowinvestigatorsconductingresearchortestsofenvironmentalrelevancetoselectappropriatelightsources.Investigatorswillbeabletomakereasonableselectionsoflightsourcesbasedoncost,therequirementsofthetestorganisms,andthepropertiesofthetestchemicals.Thesemethodshavemajorsignificanceforthecomparisonofresultsbetweenlaboratories.Investigatorsatdifferentsiteswillbeabletoselectsimilarlightsources.Thiswillprovidestandardizationofafactorthatcanhavemajorimpactontheeffectsofhazardouschemicals.1.1Theuseofartificiallightingisoftenrequiredtostudytheresponsesoflivingorganismstocontaminantsinacontrolledmanner.Evenifthetestorganismdoesnotrequirelight,theinvestigatorwillgenerallyneedlighttomanipulatethesamples,andthetestmightbeconductedundertheambientlightofthelaboratory.Onewillneedtoconsidernotonlywhethertheparticulartestorganismrequireslightforgrowth,butalsowhethertheenvironmentalcompartmentrelevanttothetestisexposedtolightand,ifso,whattheattributesoflightareinthatcompartment.Thelightcouldaffectgrowthoftheorganismortoxicityofacontaminant,orboth.Forinstance,ithasbeenshownthatthetoxicityofsomeorganicpollutantsisenhanceddramaticallybytheultraviolet(UV)radiationpresentinsunlight(1,2).Furthermore,thelevelofambientlightinginthelaboratory(whichmightaffectthetest)isnotstandardized,norisitcomparabletonaturalenvironments.Itisthusimportanttoconsiderlightinginallformsofenvironmentaltesting.Whenlightisusedinthetest,oneshoulddeterminewhetherthespectraldistributionoftheradiationsourcemimicssunlightadequatelytobeconsideredenvironmentallyrelevant.Also,thecontainerorvesselfortheexperimentmustbetransparent,atthepointoflightentry,toallofthespectralregionsinthelightsourceneededforthetest.1.2Itispossibletosimulatesunlightwithrespecttothevisible:UVratiowithrelativelyinexpensiveequipment.Thisguidecontainsinformationonthetypesofartificiallightsourcesthatarecommonlyusedinthelaboratory,compositionsoflightsourcesthatmimicthebiologicallyrelevantspectralrangeofsunlight,quantificationofirradiancelevelsofthelightsources,determinationofspectraloutputsofthelightsources,transmittancepropertiesofmaterialsusedforlaboratorycontainers,calculationofbiologicallyeffectiveradiation,andconsiderationsthatshouldgointodesigningarelevantlightsourceforagiventest.1.3Specialneedsorcircumstanceswilldictatehowagivenlightsourceisconstructed.Thisisbasedontherequirementsofthetestandtheenvironmentalcompartmenttowhichitistargeted.Usingappropriateconditionsismostimportantforanyexperiment,anditisdesirabletostandardizetheseconditionsamonglaboratories.Inextremecases,testsusingunusuallightingconditionsmightrenderadatasetincomparabletoothertests.1.4Thelightingconditionsdescribedhereinareapplicabletotestswithmostorganismsandusingmostchemicals.Withappropriatemodifications,theselightsourcescanbeusedundermostlaboratoryconditionswithmanytypesoflaboratoryvessels.1.5Theattributesofthelightsourceusedinagivenstudyshouldlistthetypesoflampsused,anyscreeningmaterials,thelightlevelasanenergyfluencerate(inWmx2212;2)orphotonfluencerate(inx03BC;molmx2212;2sx2212;1),andthetransmissionprope......
【中国标准分类号】:N04
【国际标准分类号】:91_160_10
【页数】:12P.;A4
【正文语种】:英语