【英文标准名称】:StandardTestMethodforSodiuminWaterbyAtomicAbsorptionSpectrophotometry
【原文标准名称】:原子吸收分光光度法对水中钠含量的标准试验方法
【标准号】:ASTMD4191-2003
【标准状态】:现行
【国别】:
【发布日期】:2003
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:D19.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:光谱测定法;水;原子吸收分光光度测定法;含量测定;钠;试验
【英文主题词】:analysis;atomicabsorption;sodium;water;
【摘要】:Sodiumsaltsareverysoluble,andsodiumleachedfromsoilandrockstendstoremaininsolution.Waterwithahighratioofsodiumtocalciumisdeleterioustosoilstructure.Sodiumisnotparticularlysignificantinpotablewaterexceptforthosepersonshavinganabnormalsodiummetabolism,butwatersuppliesinsomeareascontainsufficientsodiumtobeafactorintheplanningofsodium-freediets.Theuseofsodiumsaltsiscommoninindustry;therefore,manyindustrialwastewaterscontainsignificantquantitiesofsodium.Forhigh-pressureboilerfeed-watereventraceamountsofsodiumareofconcern.1.1Thistestmethodcoversthedeterminationoflowamountsofsodiuminwatershavinglowsolidscontent.Theapplicablerangeofthistestmethodisfrom0.20to3.0mg/Lwhenusingthe589.6-nmresonanceline.Thisrangemaybeextendedupwardbydilutionofanappropriatealiquotofsampleorbyuseoftheless-sensitive330.2-nmresonanceline(seeTestMethodD3561).Manyworkershavefoundthatthistestmethodisreliableforsodiumlevelsto0.005mg/L,butuseofthistestmethodatthislowlevelisdependentontheconfigurationoftheaspiratorandnebulizersystemavailableintheatomicabsorptionspectrophotometeraswellastheexperienceandskilloftheanalyst.Theprecisionandbiasdatapresentedareinsufficienttojustifyuseofthistestmethodinthe0.005to0.20-mg/Lrange.1.2Thistestmethodhasbeenusedsuccessfullywithspikedreagentwater.Itistheanalyst'sresponsibilitytoassurethevalidityofthetestmethodtootherlowdissolvedsolidsmatrices.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z16
【国际标准分类号】:13_060_50
【页数】:4P.;A4
【正文语种】: