【英文标准名称】:StandardTestMethodforEffectsofLaboratoryAcceleratedWeatheringonElastomericJointSealants
【原文标准名称】:加速风化对弹性接缝密封胶影响的标准试验方法
【标准号】:ASTMC793-2005
【标准状态】:现行
【国别】:美国
【发布日期】:2005
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:密封层(剂);建筑材料;接缝密封胶;风化;试验
【英文主题词】:sealants;weathering;testing;jointsealants;buildingmaterials
【摘要】:
【中国标准分类号】:Q24
【国际标准分类号】:83_060;91_100_50
【页数】:4P;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodforpHofAtmosphericWetDepositionSamplesbyElectrometricDetermination
【原文标准名称】:电测法测定大气湿沉积物样品pH值的标准试验方法
【标准号】:ASTMD5015-2002
【标准状态】:现行
【国别】:
【发布日期】:2002
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:D22.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验方法;沉积物;大气;pH值;湿的
【英文主题词】:atmosphericdeposition;hydrogenion;lowionicstrengthsolutions;pH;precipitation;wetdeposition;
【摘要】:TheaccuratemeasurementofpHinatmosphericwetdepositionisanessentialandcriticallyimportantcomponentinthemonitoringofatmosphericwetdepositionfortrendsintheacidityandoverallairquality.Atmosphericwetdepositionis,ingeneral,alowionicstrength,unbufferedsolution.Specialprecautions,asdetailedinthistestmethod,arenecessarytoensureaccuratepHmeasurements(1).3Specialemphasismustbeplacedonminimizingtheeffectoftheresidualliquidjunctionpotentialbias.ThistestmethodisapplicableonlytothemeasurementofpHinatmosphericwetdeposition.Itsuseinotherapplicationsmayresultininaccuracies.Fig.1providesafrequencydistributionofprecipitationpHvaluesmeasuredinconjunctionwithanationalmonitoringprogramwithintheUnitedStates.ThesedataareanindicationoftherangeofpHvaluescommontoatmosphericwetdeposition.FIG.1FrequencyDistributionofMeasuredLaboratorypHofAtmosphericWetDepositionFromthe1984NationalAtmosphericDepositionProgram(NADP)/NationalTrendsNetwork(NTN)1.1ThistestmethodisapplicabletothedeterminationofpHinatmosphericwetdepositionsamplesbyelectrometricmeasurementusingeitherapHhalfcellwithareferenceprobeoracombinationelectrodeasthesensor.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z15
【国际标准分类号】:71_040_50
【页数】:6P.;A4
【正文语种】: