SAE AS100 Fitting, Cross, Short Flareless
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来源:标准资料网
Product Code:SAE AS100
Title:Fitting, Cross, Short Flareless
Issuing Committee:G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
Scope:No scope available.
【英文标准名称】:StandardTestMethodsforSeleniuminWater
【原文标准名称】:水中硒含量的标准试验方法
【标准号】:ASTMD3859-2008
【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】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:atomicabsorption;furnace(MethodB);hydridetechnique(MethodA);selenium;totalrecoverableselenium;water;Atomicabsorptionspectrophotometry/spectroscopy;Dissolvedelements(ofwater);Furnaces;GaseoushydrideAAS;Graphitefurnaceatomic
【摘要】:Inmostnaturalwatersseleniumconcentrationsseldomexceed10x03BC;g/L.However,therunofffromcertaintypesofseleniferoussoilsatvarioustimesoftheyearcanproduceconcentrationsashighasseveralhundredmicrogramsperlitre.Additionally,industrialcontaminationcanbeasignificantsourceofseleniuminriversandstreams.Highconcentrationsofseleniumindrinkingwaterhavebeensuspectedofbeingtoxictoanimallife.Seleniumisaprioritypollutantandallpublicwateragenciesarerequiredtomonitoritsconcentration.Thesetestmethodsdeterminethedominantspeciesofseleniumreportedlyfoundinmostnaturalandwastewaters,includingselenities,selenates,andorgano-seleniumcompounds.1.1Thesetestmethodscoverthedeterminationofdissolvedandtotalrecoverableseleniuminmostwatersandwastewaters.Bothtestmethodsutilizeatomicabsorptionprocedures,asfollows:
Sections
Product Code:SAE AMS5533
Title:Alloy Sheet, Strip, and Plate, Corrosion and Heat Resistant Iron Base 20cr 20ni 20co 4mo 4w 4cb (Cancelled Oct 1982)
Issuing Committee:
Scope:
