MIL-E-4158E
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来源:标准资料网
MIL-E-4158E, MILITARY SPECIFICATION, ELECTRONIC EQUIPMENT, GROUND; GENERAL REQUIREMENTS FOR (11 JAN 1973) [S/S BY MIL-STD-454]., This specification covers the general requirements of the design and manufacture of ground electronic equipment.
【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】:
【英文标准名称】:ERRATUM
【原文标准名称】:勘误
【标准号】:JISG3506ERRATUM1-2004
【标准状态】:现行
【国别】:日本
【发布日期】:2004-06-20
【实施或试行日期】:
【发布单位】:日本工业标准调查会(JP-JISC)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:H49
【国际标准分类号】:
【页数】:1P;A4
【正文语种】:日语
