【英文标准名称】:StandardPracticeforMeasuringElementsinWaterbyFlameAtomicAbsorptionSpectrophotometry
【原文标准名称】:火焰原子吸收分光光度法测定水中元素的标准实施规范
【标准号】:ASTMD4691-2002(2007)
【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】:水;测量;元件
【英文主题词】:atomicabsorptionspectrophotometry;flame
【摘要】:Elementalconstituentsinwaterandwastewaterneedtobeidentifiedtosupporteffectivewaterqualitymonitoringandcontrolprograms.Currently,oneofthemostwidelyusedandpracticalmeansformeasuringconcentrationsofelementsisbyatomicabsorptionspectrophotometry.Themajoradvantageofatomicabsorptionoveratomicemissionisthealmosttotallackofspectralinterferences.Inatomicemission,thespecificityofthetechniqueisalmosttotallydependentonmonochromatorresolution.Inatomicabsorption,however,thedetectorseesonlythenarrowemissionlinesgeneratedbytheelementofinterest.1.1Thispracticecoversgeneralconsiderationsforthequantitativedeterminationofelementsinwaterandwastewaterbyflameatomicabsorptionspectrophotometry.Flameatomicabsorptionspectrophotometryissimple,rapid,andapplicabletoalargenumberofelementsindrinkingwater,surfacewaters,anddomesticandindustrialwastes.Whilesomewatersmaybeanalyzeddirectly,otherswillrequirepretreatment.1.2Detectionlimits,sensitivity,andoptimumrangesoftheelementswillvarywiththevariousmakesandmodelsofsatisfactoryatomicabsorptionspectrometers.Theactualconcentrationrangesmeasurablebydirectaspirationaregiveninthespecifictestmethodforeachelementofinterest.Inthemajorityofinstancestheconcentrationrangemaybeextendedlowerbyuseofelectrothermalatomizationandconverselyextendedupwardsbyusingalesssensitivewavelengthorrotatingtheburnerhead.Detectionlimitsbydirectaspirationmayalsobeextendedthroughsampleconcentration,solventextractiontechniques,orboth.Wheredirectaspirationatomicabsorptiontechniquesdonotprovideadequatesensitivity,theanalystisreferredtoPracticeD3919orspecializedproceduressuchasthegaseoushydridemethodforarsenic(TestMethodsD2972)andselenium(TestMethodsD3859),andthecoldvaportechniqueformercury(TestMethodD3223).1.3Becauseofthedifferencesamongvariousmakesandmodelsofsatisfactoryinstruments,nodetailedoperatinginstructionscanbeprovided.Insteadtheanalystshouldfollowtheinstructionsprovidedbythemanufacturerofaparticularinstrument.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.ForspecifichazardstatementsseeSection9.
【中国标准分类号】:Z16
【国际标准分类号】:13_060_50
【页数】:6P.;A4
【正文语种】: