作者:标准资料网 时间:2024-05-21 17:59:12   浏览:9878   来源:标准资料网

【英文标准名称】:StandardPracticesforDigestionofWaterSamplesforDeterminationofMetalsbyFlameAtomicAbsorption,GraphiteFurnaceAtomicAbsorption,PlasmaEmissionSpectroscopy,orPlasmaMassSpectrometry
【原文标准名称】:用火焰原子吸收法、石墨炉原子吸收法、等离子体发射光谱法或等离子体质谱法测定金属含量用水试样浸煮的标准实施规范
【标准号】:ASTMD1971-2002(2006)
【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(US-ASTM)
【起草单位】:D19.05
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:光谱学;金属;试样制备
【英文主题词】:digestion;flameatomicabsorptionspectroscopy;graphitefurnaceatomicabsorptionspectroscopy;inductivelycoupledplasma(ICP);metals;plasma-massspectrometry;wastewater;water
【摘要】:Thedeterminationofmetalsinwateroftenrequiresthemeasurementoftotal(suspendedanddissolved)metalsaswellassoluble(dissolved)metals.Insuchcases,consistentanddependabledigestionproceduresmustbeusedsothatdataderivedforthetotalmetalscontentisreliable.Thepracticesgivenareapplicabletoawidevarietyofsampletypesforthepurposeofpreparingasampleformetalsanalysesbyatomicabsorptionspectrophotometryorplasmaemissionspectroscopy(seeTestMethodsD1976,D3919,D4691,andD4190)orplasma-massspectrometry(SeeTestMethodD5673)andhavebeenshowntogivegoodrecoveryinthefollowingmatrices:industrialeffluents;wastewatertreatmentplantinfluents,sludges,dewateredsludges,andeffluents;riverandlakewaters;andplantandanimaltissues.Elementswhichhaveshowngoodrecoveryinclude:copper,nickel,lead,zinc,cadmium,iron,manganese,magnesium,andcalcium.4.2.1Goodrecoveryfortheindicatedsampletypesandmetalsmaynotbeachievedatalltimesduetoeachsamplersquo;uniquecharacteristics.Usersmustalwaysvalidatethepracticefortheirparticularsamples.Theanalyticalresultsachievedafterapplyingthesepracticescannotnecessarilybedeemedasameasureofbioavailableorenvironmentallyavailableelements.Thesethreepracticesmaynotgivethesamerecoverywhenappliedtothesamesample,norwilltheynecessarilygivethesameresultsasachievedusingotherdigestiontechniques.AnalternatedigestiontechniqueisPracticeD4309.1.1Mostatomicabsorptionandplasmaemissionspectroscopy,andplasma-massspectrometrictestmethodsrequirethatthemetalsofinterestbedissolvedinaliquidphasebeforebeingintroducedintothespectrophotometer.Thesepracticesdescribedigestionordissolutionprocedureswherebyanalytemetalsassociatedwiththesolidfractionofasamplecanbebroughtintosolutionforsubsequentanalysis.Thefollowingpracticesareincluded:SectionsPracticeA-DigestionwithMineralAcidsandElevatedPressure8through13PracticeB-DigestionwithMineralAcidsandHeatingatAtmosphericPressure14through19PracticeC-In-bottledigestionwithMineralAcids20through25