DIN 46380-1979 电缆和电线的生产及运输的定义和尺寸字母
时间:2024-05-24 12:01:21 来源: 标准资料网 作者：标准资料网 阅读：8119
【英文标准名称】:Definitionsanddimensionslettersformanufacturingandtransportofcablesandwires
【原文标准名称】:电缆和电线的生产及运输的定义和尺寸字母
【标准号】:DIN46380-1979
【标准状态】:作废
【国别】:德国
【发布日期】:1979-05
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:轴向;电气工程;大小测量;凸轮;圆锥体形;突台;轮辐;箱;圆柱形;包装件;垫圈;容器;法兰;电缆;电缆;金属线;尺寸;胶纸板;盖;荷载能力;定义;公差(测量)
【英文主题词】:cables;sizemeasurement;boxes;cylindricalshape;cams;packages;flanges;containers;spokes;washers;dimensions;bosses;lids;definitions;electricalengineering;electriccables;tolerances(measurement);load
【摘要】:
【中国标准分类号】:K90
【国际标准分类号】:29_060_01;01_040_29
【页数】:14P;A4
【正文语种】:德语
【英文标准名称】:Methodsoftestforpetroleumanditsproducts-Petroleumproducts-Determinationofacidnumber-Semi-microcolour-indicatortitrationmethod
【原文标准名称】:石油及石油产品的试验方法.石油产品.第431部分:酸值测定.半微量颜色指示滴定法
【标准号】:BS2000-431-1998
【标准状态】:现行
【国别】:英国
【发布日期】:1998-03-01
【实施或试行日期】:1998-03-01
【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】:润滑油;化学分析和试验;半微量分析;试验设备;校正;酸滴定法;化学指数;酸值;容量分析;石油;萃取分析法;化学指示剂;石油产品;含量测定;再现性;颜色
【英文主题词】:Acidnumber;Chemicalanalysisandtesting;Colourindicatortitration;Definition;Definitions;Determination;Determinationofcontent;Petroleumproducts;Titrationmethod;Volumetricanalysis
【摘要】:IdenticalwithIP431/98
【中国标准分类号】:E30
【国际标准分类号】:75_080
【页数】:12P.;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforDeterminationofFormaldehydeandOtherCarbonylCompoundsinAir(ActiveSamplerMethodology)
【原文标准名称】:测定空气中甲醛和其他羰基化合物的标准试验方法(快速取样法)
【标准号】:ASTMD5197-2003
【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】:D22.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验;甲醛;空气;含量测定
【英文主题词】:activesampler;air;carbonylcompounds;DNPHcartridge;formaldehyde;HPLCanalysis
【摘要】:Thistestmethodprovidesananalyticalprocedureformeasuringformaldehydeandothercarbonylcompoundsinindoororoutdoorair.1.1Thistestmethodcoversaprocedureforthedeterminationofformaldehyde(HCHO)andothercarbonylcompounds(aldehydesandketones)inair.Othercarbonylcompoundsthathavebeenvalidatedfordeterminationbythismethodincludeacetaldehyde,acetone,propanal(propionaldehyde),methacrolein,2-butanone(methylethylketone),butyraldehyde,benzaldehyde,isovaleraldehyde,valeraldehyde,o-tolualdehyde,m-tolualdehyde,p-tolualdehyde,hexanal,and2,5-dimethylbenzaldehyde.Acroleinandcrotonaldehydemaybequantifiedwithgoodaccuracyfollowingspecialprecautions(see10.2.5).1.2Thistestmethodinvolvesdrawingairthroughacartridgecontainingsilicagelcoatedwith2,4-dinitrophenylhydrazine(DNPH)reagent.CarbonylcompoundsreadilyformstablederivativeswiththeDNPHreagent.TheDNPHderivativesareanalyzedforparentaldehydesandketonesutilizinghighperformanceliquidchromatography(HPLC).ThesamplingprocedureisamodificationofU.S.EPAMethodTO-11A(see2.2).1.3ThistestmethodisbasedonthespecificreactionofcarbonylcompoundswithDNPHinthepresenceofanacidtoformstablederivativesaccordingtothereactionshowninFig.1,(where:bothRandR1arealkyloraromaticgroups(ketones),orboth,oreitherRorR1isahydrogenatom(aldehydes)).Thedeterminationofformaldehydeandothercarbonylcompounds,asDNPHderivatives,issimilartothatofU.S.EPAMethodTO-11AinthatitutilizesHPLCwithUVdetectionastheanalyticalfinish.ThedetectionlimitshavebeenextendedtoothercarbonylcompoundsthatcanbedeterminedasoutlinedinSection10.2.4.Thistestmethodissuitablefordeterminationofformaldehydeandothercarbonylcompoundsintheconcentrationrangefromapproximately10ppbto1ppm(v/v).1.4Thesamplingmethodgivesatime-weightedaverage(TWA)sample.Itcanbeusedforlong-term(1to24h)orshort-term(5to60min)samplingofairforformaldehyde.1.5ThistestmethodinstructstheuseronhowtopreparesamplingcartridgesfromcommerciallyavailablechromatographicgradesilicagelcartridgesbytheapplicationofacidifiedDNPHtoeachcartridge.1.6Thesamplingflowrate,asdescribedinthistestmethod,hasbeenvalidatedforsamplingratesupto1.5L/min.Thisflowratelimitationisprincipallyduetothehighpressuredrop(>8kPaat1.0L/min)acrosstheuserpreparedsilicagelcartridgeswhichhaveaparticlesizeof55to105956;m.Thesecartridgesarenotgenerallycompatiblewithbattery-poweredpumpsusedinpersonalsamplingequipment(forexample,thoseusedbyindustrialhygienists.)1.7Alternatively,pre-coatedDNPHsilicagelcartridgesarealsocommerciallyavailableandmaybesubstitutedprovidedtheycanbedemonstratedtoperformequivalently.Someoftheseusesilicagelofalargerparticlesizethatresultsinalowerpressuredropacrossthecartridge.Theselowpressuredropcartridgesmaybemoresuitableforsamplingairusingbattery-poweredpersonalsamplingpumps.1.8ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.9Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G17
【国际标准分类号】:71_080_80
【页数】:15P.;A4
【正文语种】: