【英文标准名称】:Low-voltageswitchgearandcontrolgearassemblies-Part2:Powerswitchgearandcontrolgearassemblies(IEC61439-2:2009);GermanversionEN61439-2:2009
【原文标准名称】:低压开关设备和控制设备组件.第2部分:电动开关设备和控制设备组件(IEC61439-2:2009);德文版本EN61439-2:2009
【标准号】:DINEN61439-2-2010
【标准状态】:作废
【国别】:德国
【发布日期】:2010-06
【实施或试行日期】:2010-06-01
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Accessories;Alternatingvoltages;Auxiliarycircuits;Characteristics;Circuits;Combination;Combinationapparatus;Compositedevices;Constructionrequirements;Definitions;Design;Electricenergy;Electricalengineering;Electricalsafety;Electromagneticcompatibility;EMC;Enclosures;Energy;Environmentalcondition;Instruments;Lowvoltage;Low-voltageequipment;Low-voltageswitchgear;Low-voltagetechnology;Maincircuit;Marking;Operatingconditions;Powerfactor;Protectionagainstelectricshocks;Qualificationtests;Ratings;Routinechecktests;Specification(approval);Switchgear;Switchgearassemblies;Switchgears;Switchingsystems;Testing;Verification
【摘要】:
【中国标准分类号】:
【国际标准分类号】:29_130_20
【页数】:24P;A4
【正文语种】:德语


【英文标准名称】:Gelpermeationchromatography(GPC)-Part3:Wateraselutionsolvent
【原文标准名称】:凝胶渗透色谱法(GPC).第3部分:用水作洗脱溶剂
【标准号】:DIN55672-3-2007
【标准状态】:现行
【国别】:德国
【发布日期】:2007-08
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:器具;粘合剂;校正;化学分析和试验;色谱;色谱法;覆层材料;覆层;定义;含量测定;凝胶渗透色谱法;凝胶;GPC;高效液相色谱分析法;调查;浸出;液相色谱法;测量;摩尔质量;涂料;渗透;塑料;高聚物;试样制备;试验设备;测试;清漆;水
【英文主题词】:Apparatus;Bindingagents;Calibration;Chemicalanalysisandtesting;Chromatograms;Chromatography;Coatingmaterials;Coatings;Definition;Definitions;Determinationofcontent;Gelpermeationchromatography;Gels;GPC;HPLC;Investigations;Leaching;Liquidchromatography;Measurement;Molarmass;Paints;Permeation;Plastics;Polymers;Specimenpreparation;Testequipment;Testing;Varnishes;Water
【摘要】:Thisstandarddescribesthedeterminationofthemolecularweightdistribution,number-averagemolecularweightMnandweight-averagemolecularweightMwofpolymersthataresolubleinwaterbygelpermeationchromatography(GPC).Thisstandardisapplicabletoneutralpolymersandpolyanions(e.g.polycarboxylates,polysaccharides,completelysaponifiedpolyvinylalcoholsandhigh-molecularpolyethyleneoxides).Itisnotapplicabletopolycations(e.g.polyvinytpyrrolidone,polyvinylpyridine,saltsofpoly(diallyI-N,N-dimethyl-azacyclopentane)andchitosane.Itispossiblethat,inspiteofthegoodsolubilityinthemobilephaseandthegoodrepeatabilityofthechromatogramsobtained,thismethodcannotbeusedwithcertainpolymertypesbecauseofspecificinteractions,suchasadsorption,withinthesample/eluent/columncombination(seealsoclause12).Themethodisnotanabsoluteoneandrequirescalibrationwithcommerciallyavailableunbranchedpullulanstandardsthathavebeencharacterizedbyindependentabsolutemethods.Theresultsforsamplesofpolymersotherthanpullulanarethereforeonlycomparablewithingroupsofsamplesofthesametype.TheconditionsspecifiedinthisstandardarenotsuitablefortheGPCanalysisofpolymersampleswithMwvaluesgreaterthan10~6g/mol(seeAnnexC).Nocorrectionmethods(e.g.fortheeliminationofpeakbroadening)areincludedinthisstandard.Ifabsolutemolecularweightvaluesarerequired,anabsolutemethod,e.g.membraneosmometryforMnorlightscatteringforMw,shallbeused.
【中国标准分类号】:G04
【国际标准分类号】:71_040_50
【页数】:27P.;A4
【正文语种】:英语