【英文标准名称】:Adhesives.Preparationofmetallicsubstratesfortestpiecesintendedforlaboratorytests.
【原文标准名称】:粘合剂.试验室试验用试件金属基片的制备
【标准号】:NFT76-201-1982
【标准状态】:现行
【国别】:法国
【发布日期】:1982-12-01
【实施或试行日期】:1982-12-30
【发布单位】:法国标准化协会(FR-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】:G38
【国际标准分类号】:25_220_10;83_180
【页数】:8P.;A4
【正文语种】:其他
基本信息
| 标准名称： | 钢丝螺套螺孔用丝锥应用尺寸 |
| 中标分类： |
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| 替代情况： | 被QJ 2821A-2004代替 |
| 发布日期： | 1996-03-21 |
| 实施日期： | 1996-12-01 |
| 首发日期： | |
| 作废日期： | 2004-12-01 |
| 出版日期： | |
| 页数： | 13页 |
适用范围
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前言
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目录
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引用标准
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所属分类：
【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