NF T20-262-1968 盐酸和硝酸的化学分析.硫酸盐灰分的测定
时间:2024-05-19 12:46:42 来源: 标准资料网 作者：标准资料网 阅读：8432
【英文标准名称】:Chemicalanalysisofhydrochloricandnitricacids.Determinationofsulphatedash.
【原文标准名称】:盐酸和硝酸的化学分析.硫酸盐灰分的测定
【标准号】:NFT20-262-1968
【标准状态】:现行
【国别】:法国
【发布日期】:1968-07-01
【实施或试行日期】:1968-06-25
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:化学分析;沉淀物;化学分析和试验;化学残余物;硫酸盐;硝酸;盐酸;热解分析;分离法(化学分析);含量测定
【英文主题词】:Chemicalanalysisandtesting;Determinationofcontent;Gravimetricanalysis;Hydrochloricacid;Sulphatedashes;Sulphates
【摘要】:
【中国标准分类号】:G11
【国际标准分类号】:71_060_30
【页数】:2P.;A4
【正文语种】:其他
【英文标准名称】:Acoustics-Determinationofsoundabsorptioncoefficientandimpedanceinimpedancestubes-Methodusingstandingwaveratio
【原文标准名称】:声学.阻抗管中吸声系数和阻抗的测定.驻波比法
【标准号】:BSENISO10534-1-2001
【标准状态】:现行
【国别】:英国
【发布日期】:2001-11-02
【实施或试行日期】:2001-11-02
【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】:吸收;声音吸收;声学测量;声学试验;声学;建筑物;定义;定义(术语);阻抗;反射比因数;吸声系数
【英文主题词】:Absorption;Acousticabsorption;Acousticmeasurement;Acoustictesting;Acoustics;Buildings;Definition;Definitions;Impedance;Reflectancefactor;Soundabsorptioncoefficient
【摘要】:1ThispartofISO10534specifiesamethodforthedeterminationofthesoundabsorptioncoefficient,reflectionfactorandsurfaceimpedanceorsurfaceadmittanceofmaterialsandobjects.Thevaluesaredeterminedfornormalsoundincidencebyevaluationofthestandingwavepatternofaplanewaveinatube,whichisgeneratedbythesuperpositionofanincidentsinusoidalplanewavewiththeplanewavereflectedfromthetestobject.Thismethodcanbeusedforthedeterminationofthesoundabsorptioncoefficientofsoundabsorbersfornormalsoundincidence.Itcanfurtherbeusedforthedeterminationoftheacousticalsurfaceimpedanceorsurfaceadmittanceofsound-absorbingmaterials.Itiswellsuitedforparameterstudiesandforthedesignofsoundabsorbers,becauseonlysmallsamplesoftheabsorbermaterialareneeded.2Therearesomecharacteristicdifferencesbe-tweenthismethodandthemeasurementofsoundabsorptioninareverberationroom(seeISO354).Theimpedancetubemethodcanbeusedforthede-terminationofthereflectionfactorandalsotheim-pedanceoradmittance.Thesoundisincidentnormallyontheobjectsurface.Thereverberationroommethodwill(underidealizedconditions)determinethesoundabsorptioncoefficientforrandomsoundincidence.Theimpedancetubemethodreliesontheexistenceofaplaneincidentsoundwaveandgivesexactvaluesunderthiscondition(measuringandmountingerrorsexcluded).Theevaluationofthesoundabsorptionco-efficientinareverberationroomisbasedonanumberofsimplifyingandapproximateassumptionsconcern-ingthesoundfieldandthesizeoftheabsorber.Soundabsorptioncoefficientsexceedingthevalue1arethereforesometimesobtained.Theimpedancetubemethodrequiressamplesofthetestobjectwhicharethesizeofthecross-sectionalareaoftheimpedancetube.Thereverberationroommethodrequirestestobjectswhichareratherlargeandcanalsobeappliedtotestobjectswithpro-nouncedstructuresinthelateraland/ornormaldirec-tions.Measurementswithsuchobjectsintheimpedancetubemustbeinterpretedwithcare(see9.1).Forthecomputationaltransformationofthetestre-sultsfromtheimpedancetubemethod(normalinci-dence)tothesituationofdiffusesoundincidence,seeannexD.3ThispartofISO10534givespreferencetonu-mericalmethodsofevaluationinsteadofgraphicalmethods,becausecomputerswhichcanperformthesecomputationsareassumedtobeavailable.Someofthequantitiesintheformulaearecomplex.Theargumentsoftrigonometricfunctionsareinradians.
【中国标准分类号】:A42
【国际标准分类号】:91_120_20
【页数】:30P.;A4
【正文语种】:英语
【英文标准名称】:StandardSpecificationforTinMillProducts,GeneralRequirements[Metric]
【原文标准名称】:一般要求的锡轧制产品的标准规格(公制)
【标准号】:ASTMA623M-2010
【标准状态】:现行
【国别】:
【发布日期】:2010
【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】:A01.20
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:略比表;加气介质极化测试(AMP);锡合金电偶电流测定法(ATC);二苯碳酰二肼法;溶解率;铁溶出值;酸浸时滞性试验;锡晶粒尺寸测试;全油表面
【英文主题词】:Abbreviatedratiotables;Aeratedmediapolarization(AMP)test;Alloy-tincouple(ATC)test;Diphenylcarbazidemethod;Dissolutionrate;Ironsolutionvalue;Picklelagtest;Tincrystalsizetest;Totalsurfaceoil
【摘要】:1.1Thisspecificationcoversagroupofcommonrequirementswhich,unlessotherwisespecifiedinthepurchaseorderorinanindividualspecification,shallapplytotinmillproducts.1.2Incaseofconflictinrequirements,therequirementsofthepurchaseorder,theindividualmaterialspecification,andthisgeneralspecificationshallprevailinthesequencenamed.1.3ThefollowingsafetyhazardscaveatcoversAnnexA1throughAnnexA8ofthisspecification:Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note18212;Acompleteinch-poundcompaniontoSpecificationA623MhasbeendevelopedA623;therefore,noinch-poundequivalentsarepresented.
【中国标准分类号】:H62
【国际标准分类号】:77_140_50
【页数】:25P.;A4
【正文语种】: