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【英文标准名称】:StandardPracticeforMeasuringTraceElementsinWaterbyGraphiteFurnaceAtomicAbsorptionSpectrophotometry
【原文标准名称】:用石墨炉原子吸收光谱法测定水中微量元素的标准方法
【标准号】:ASTMD3919-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:D19.05
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:elements;graphitefurnaceatomicabsorption;water;Graphitefurnaceatomicabsorptionspectrometry(GFAAS);Inorganiccompounds--water;Organiccompounds--water;Spectrophotometry--atomicabsorption(water/wastewater);Traceelements--wateranalysis;
【摘要】:Elementalconstituentsinpotablewater,receivingwater,andwastewaterneedtobeidentifiedforsupportofeffectivepollutioncontrolprograms.Currently,oneofthemostsensitiveandpracticalmeansformeasuringlowconcentrationsoftraceelementsisbygraphitefurnaceatomicabsorptionspectrophotometry.1.1Thispracticecoversthegeneralconsiderationsforthequantitativedeterminationoftraceelementsinwaterandwastewaterbygraphitefurnaceatomicabsorptionspectrophotometry.Furnaceatomizersareamostusefulmeansofextendingdetectionlimits;however,thepracticeshouldonlybeusedatconcentrationlevelsbelowtheoptimumrangeofdirectflameaspirationatomicabsorptionspectrophotometry.Becauseofdifferencesbetweenvariousmakesandmodelsofsatisfactoryinstruments,nodetailedoperatinginstructionscanbeprovidedforeachinstrument.Instead,theanalystshouldfollowtheinstructionsprovidedbythemanufacturerofaparticularinstrument.1.2Wavelengths,estimateddetectionlimits,andoptimumconcentrationrangesaregivenintheindividualmethods.Rangesmaybeincreasedordecreasedbyvaryingthevolumeofsampleinjectedortheinstrumentalsettingsorbytheuseofasecondarywavelength.Samplescontainingconcentrationshigherthanthosegivenintheoptimumrangemaybedilutedoranalyzedbyothertechniques.1.3Thistechniqueisgenerallynotapplicabletobrinesandseawater.Specialtechniquessuchasseparationofthetraceelementsfromthesalt,carefultemperaturecontrolthroughrampingtechniques,ormatrixmodificationmaybeusefulforthesesamples.1.4Theanalystisencouragedtoconsulttheliteratureasprovidedbytheinstrumentmanufactureraswellasvarioustradejournalsandscientificpublications.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z16
【国际标准分类号】:
【页数】:8P.;A4
【正文语种】:英语


【英文标准名称】:SpecificationforFireclayBrickRefractoriesforMalleableIronFurnaceswithRemovableBungs,andforAnnealingOvens
【原文标准名称】:耐水石墨背衬板
【标准号】:ASTMC63-1961
【标准状态】:作废
【国别】:
【发布日期】:1961
【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】:
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:水;熟石膏;木板条;施工材料;建筑
【英文主题词】:
【摘要】:
【中国标准分类号】:Q51
【国际标准分类号】:
【页数】:
【正文语种】: