NF F50-403-1988 铁路固定设备.标准铁轨.46kg/m铁轨在金属轨枕上的固定和不同轨距相应轨夹的位置

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【英文标准名称】:Electricalapparatusforpotentiallyexplosiveatmospheres;Oilimmersion"o"
【原文标准名称】:爆炸危险区域用电气器材.O型油封
【标准号】:DINVDE0170/0171-2-1978
【标准状态】:作废
【国别】:德国
【发布日期】:1978-05
【实施或试行日期】:1978-05-00
【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】:防爆;变压器;电气工程;作标记;油;开关设备;油浸式变压器;定义;建筑规范
【英文主题词】:oils;explosionprotection;switchgear;oil-immersedtransformers;transformers;marking;electricalengineering;definitions;buildingspecifications
【摘要】:
【中国标准分类号】:K35
【国际标准分类号】:1180
【页数】:8P;A4
【正文语种】:德语


【英文标准名称】:StandardTestMethodforOn-LineMonitoringofTotalCarbon,InorganicCarboninWaterbyUltraviolet,PersulfateOxidation,andMembraneConductivityDetection
【原文标准名称】:通过紫外线,过硫酸盐氧化作用,膜导电位检测对水中总碳,无机碳在线监测的标准试验方法
【标准号】:ASTMD5997-1996(2005)
【标准状态】:现行
【国别】:
【发布日期】:1996
【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】:D19.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:无机碳;在线;膜;电导性;碳;总有机碳
【英文主题词】:carbon;conductivity;inorganiccarbon;membrane;on-line;totalorganiccarbon
【摘要】:Thistestmethodisusefulfordetectinganddeterminingorganicandinorganiccarbonimpuritiesinwaterfromavarietyofsourcesincludingindustrialwater,drinkingwater,andwastewater.Measurementoftheseimpuritiesisofvitalimportancetotheoperationofvariousindustriessuchaspower,pharmaceutical,semiconductor,drinkingwatertreatment,andwastetreatment.Semiconductorandpowerapplicationsrequiremeasurementofveryloworganiccarbonlevels(TOCx003C;1x03BC;g/L).ApplicationsinpharmaceuticalindustriesrangefromUSPpurifiedwater(TOCx003C;500x03BC;g/L)tocleaningapplications(500x03BC;g/Lx003C;TOCx003C;50000x03BC;g/L).Drinkingwatersrangefromx003C;100x03BC;g/Lto25000x03BC;g/Landhigher.Someoftheseapplicationsmayincludewaterswithsubstantialionicimpuritiesaswellasorganicmatter.Measurementofinorganiccarbonaswellastotalorganiccarbonishighlyimportanttosomeapplications,suchasinthepowerindustry.Continuousmonitoringandobservationoftrendsinthesemeasurementsareofinterestinindicatingtheneedforequipmentadjustmentorcorrectionofwaterpurificationprocedures.RefertoAnnexA1foradditionalinformationregardingthesignificanceofthistestmethod.1.1Thistestmethodcoverstheon-linedeterminationoftotalcarbon(TC),inorganiccarbon(IC),andtotalorganiccarbon(TOC)inwaterintherangefrom0.5g/Lto50000g/Lofcarbon.Highercarbonlevelsmaybedeterminedbysuitableon-linedilution.Thistestmethodutilizesultraviolet-persulfateoxidationoforganiccarboncoupledwithaCO2selectivemembranetorecovertheCO2intodeionizedwater.Thechangeinconductivityofthedeionizedwaterismeasuredandrelatedtocarbonconcentrationintheoxidizedsampleusingcalibrationdata.Inorganiccarbonisdeterminedinasimilarmannerwithouttherequirementforoxidation.Inbothcases,thesampleisacidifiedtofacilitateCO2recoverythroughthemembrane.TherelationshipbetweentheconductivitymeasurementandcarbonconcentrationcanbedescribedbyasetofchemometricequationsforthechemicalequilibriumofCO2,HCO3,H+,andOH,andtherelationshipbetweentheionicconcentrationsandtheconductivity.ThechemometricmodelincludesthetemperaturedependenceoftheequilibriumconstantsandthespecificconductancesresultinginlinearresponseofthemethodoverthestatedrangeofTOC.SeeTestMethodD4519foradiscussionofthemeasurementofCO2byconductivity.1.2Thistestmethodhastheadvantageofaveryhighsensitivitydetectorthatallowsverylowdetectionlevelsonrelativelysmallvolumesofsample.Also,theuseoftwomeasurementchannelsallowsdeterminationofICinthesampleindependentlyoforganiccarbon.IsolationoftheconductivitydetectorfromthesamplebytheCO2selectivemembraneresultsinaverystablecalibrationwithminimalinterferences.1.3Thistestmethodwasusedsuccessfullywithreagentwaterspikedwithsodiumcarbonateandvariousorganiccompounds.Thistestmethodiseffectivewithbothdeionizedwatersamplesandsamplesofhighionicstrength.Itistheuser'sresponsibilitytoensurethevalidityofthistestmethodforwatersofuntestedmatrices.1.4Thistestmethodisapplicableonlytocarbonaceousmatterinthesamplethatcanbe......
【中国标准分类号】:Z16
【国际标准分类号】:13_060_50
【页数】:7P.;A4
【正文语种】: