NF X31-120-2003 土质.铜、铁、锰和锌含量的测定.在有乙二胺四乙酸(EDTA)存在的情况下用乙酸铵提取法
时间:2024-05-17 06:39:03 来源: 标准资料网 作者：标准资料网 阅读：8594
【英文标准名称】:Soilquality-Determinationofcopper,iron,manganeseandzinccontents-ExtractionbymeansofammoniumacetateinpresenceofEDTA.
【原文标准名称】:土质.铜、铁、锰和锌含量的测定.在有乙二胺四乙酸(EDTA)存在的情况下用乙酸铵提取法
【标准号】:NFX31-120-2003
【标准状态】:现行
【国别】:法国
【发布日期】:2003-05-01
【实施或试行日期】:2003-05-20
【发布单位】:法国标准化协会(AFNOR)
【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】:Z50
【国际标准分类号】:13_080_10
【页数】:7P;A4
【正文语种】:其他
【英文标准名称】:StandardPracticeforEvaluatingtheKineticBehaviorofIonExchangeResins
【原文标准名称】:离子交换树脂动力行为评价的标准操作规程
【标准号】:ASTMD6302-1998(2004)
【标准状态】:现行
【国别】:
【发布日期】:1998
【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】:D19.08
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:浓缩抛光;混合床;离子交换;阳离子交换树脂;阴离子交换树脂;动力学;泄漏量
【英文主题词】:anionresin;cationresin;condensatepolishing;ionexchange;kinetics;leakage;mixedbed
【摘要】:Thispracticeisintendedtoevaluatechangesintheperformanceofionexchangeresinsusedinmixedbedsoperatingaspolishingsystemsforsolutionsoflowionicstrength,typically,x003C;10mg/Ldissolvedsolids,thatareintendedtoproduceveryhighpurityeffluents.Itisrecommendedthatwhennewresinsareinstalledinaplantitbeusedtoprovideabaselineagainstwhichthefutureperformanceofthatresincanbejudged.Theconditionsofthistestmustbelimitingkinetically,suchthatkineticleakage,andnotequilibriumleakage,istested.Thisleakageisinfluencedbyacombinationofinfluentflowvelocityandconcentration,aswellasbeddepth.Itisrecommendedthatthepracticebefollowedwiththeresinratio,flowrate,andinfluentqualityasindicated.Thedesignoftheapparatuspermitsothervariationstobeusedthatmaybemoreappropriatetothechemicalsusedinaspecificplantandthenatureofitscoolingwater,butthecautionsandlimitationsnotedinthepracticemustbeaccommodated.Itispossiblethatthecationresincouldexperiencekineticsproblems.Inmanycases,however,theanionresinsaremorelikelytoexperiencethetypesofdegradationorfoulingthatcouldleadtoimpairedkinetics.Testingoffieldanionandcationresinstogetherisanoption,especiallywhenhistoricdataonthemixedbedwillbecompiled.Recognize,however,thatmanyvariablescanbeintroduced,makingitdifficulttointerpretresultsortocomparetohistoricalornewresindataonseparatecomponents.ProvisionismadeforcalculationofthemasstransfercoefficientintheAppendixX1.Whensuchcalculationistobemade,afullwetsieveanalysis,asdescribedinTestMethodsD2187,alsoisrequired.Electronicparticlesizingmaybesubstitutedifitisreferencedbacktothewetsievemethod.Thispracticeisintendedtosupplement,notdisplace,otherindicatorsofresinperformance,suchasexchangecapacity,%regeneration,andserviceexperiencerecords.1.1Thispracticeisintendedtoevaluatechangesinkineticperformanceofionexchangeresinsusedinmixedbedstoproducehighpuritywater.Withinstrictlimitations,italsomaybeusedforcomparingresinofdifferenttypes.Thisstandarddoesnotseektomimicactualoperatingconditions.Specificchallengesolutionsandconditionsarespecified.Attheoptionoftheuser,otherconditionsmaybetested.1.2Thisstandarddoesnotpurporttoaddressthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G16
【国际标准分类号】:71_100_80(CHEMICALSFORPURIFICATIONOFWATER)
【页数】:6P.;A4
【正文语种】:
【英文标准名称】:DigitalVideoSystemsCharacteristicsStandardforCableTelevision
【原文标准名称】:有线电视用数字视频系统特征标准
【标准号】:ANSI/SCTE43-2005
【标准状态】:现行
【国别】:美国
【发布日期】:2005-06-10
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:SCTE
【标准类型】:()
【标准水平】:()
【中文主题词】:电缆电视;电视;数字信号;特性;视频
【英文主题词】:television;characteristics;video;cabletelevision;digitalsignals
【摘要】:DescribesthecharacteristicsandnormativespecificationsfortheVideoSubsystemStandardforCableTelevision.
【中国标准分类号】:M73
【国际标准分类号】:33_160_40
【页数】:
【正文语种】:英语