【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
【英文标准名称】:Precastconcreteproducts-Wallelements
【原文标准名称】:预制混凝土制品.墙构件
【标准号】:BSEN14992-2007
【标准状态】:作废
【国别】:英国
【发布日期】:2007-06-29
【实施或试行日期】:2007-06-29
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:梁;CE标记;柱;元部件;混凝土;合格;建筑;结构产品;定义;尺寸选定;尺寸规格;正面;特点;精整;轻质混凝土;作标记;普通混凝土;隔墙板;预制混凝土部件;预制的;预制配件;预制承梁板;规范(验收);测试;公差(测量);承梁板;墙
【英文主题词】:Beams;CEmarking;Columns;Components;Concretes;Conformity;Construction;Constructionalproducts;Definition;Definitions;Dimensioning;Dimensions;Facades;Features;Finishes;Lightweightconcrete;Marking;Normalconcrete;Partitionpanels;Precastconcreteparts;Prefabricated;Prefabricatedparts;Prefabricatedwallpanels;Specification(approval);Testing;Tolerances(measurement);Wallplates;Walls
【摘要】:ThisEuropeanStandardappliestoprefabricatedwalls,madeofnormalweightorlightweightconcretewithdensestructure.Theymayhaveexternalwallfunctions(see3.11)ornot,havefacingfunctions(see3.12)ornotorhaveacombinationofthesefunctions.Externalwallfunctionscouldbe:?thermalinsulation(see3.11.1);?soundinsulation(see3.11.2);?hygrometriccontrol(see3.11.3);oracombinationofthese.Theymaybeplain,reinforcedorprestressed.Theymaybeloadbearingornot.Theseinclude:?solidwalls;?compositewalls;?sandwichwalls;?lightenedwalls;?claddings.Thewallelementmayalsoworkasacolumnorbeam.
【中国标准分类号】:Q14
【国际标准分类号】:91_100_30
【页数】:40P.;A4
【正文语种】:英语