【英文标准名称】:StandardTablesforReferenceSolarUltravioletSpectralDistributions:Hemisphericalon37x00B0;TiltedSurface
【原文标准名称】:太阳紫外线光谱分布参考标准表:37度倾斜表面上的半球形分布
【标准号】:ASTMG177-2003(2008)e1
【标准状态】:现行
【国别】:美国
【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(US-ASTM)
【起草单位】:G03.09
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:
【英文主题词】:globalhemispherical;materialsexposure;terrestrial;ultravioletsolarspectralirradiance;Globalsolarirradiance;Solarspectralirradiance;Tables(measurement);Terrestrialsystems;Ultraviolet(UV)solarspectralirradiance
【摘要】:Thisstandarddoesnotpurporttoaddressthemeanlevelofsolarultravioletspectralirradiancetowhichmaterialswillbesubjectedduringtheirusefullife.Thespectralirradiancedistributionshavebeenchosentorepresentareasonableupperlimitfornaturalsolarultravioletradiationthatoughttobeconsideredwhenevaluatingthebehaviorofmaterialsundervariousexposureconditions.Absorptance,reflectance,andtransmittanceofsolarenergyareimportantfactorsinmaterialdegradationstudies.Thesepropertiesarenormallyfunctionsofwavelength,whichrequirethatthespectraldistributionofthesolarfluxbeknownbeforethesolar-weightedpropertycanbecalculated.Theinterpretationofthebehaviorofmaterialsexposedtoeithernaturalsolarradiationorultravioletradiationfromartificiallightsourcesrequiresanunderstandingofthespectralenergydistributionemployed.Tocomparetherelativeperformanceofcompetitiveproducts,ortocomparetheperformanceofproductsbeforeandafterbeingsubjectedtoweatheringorotherexposureconditions,areferencestandardsolarspectraldistributionisdesirable.AplotoftheSMARTS2modeloutputforthereferencehemisphericalUVradiationona37x00B0;southfacingtiltedsurfaceisshowninFig.1.TheinputneededbySMARTS2togeneratethespectrumfortheprescribedconditionsareshowninTable2.SMARTS2Version2.9.2isrequiredtogenerateAM1.05UVreferencespectra.Theavailabilityoftheadjunctstandardcomputersoftware(ADJG0173CD)forSMARTS2allowsoneto(1)reproducethereferencespectra,usingtheaboveinputparameters;(2)computetestspectratoattempttomatchmeasureddataataspecifiedFWHM,andevaluateatmosphericconditions;and(3)computetestspectrarepresentingspecificconditionsforanalysisvis-?/span>-visanyoneorallofthereferencespectra.1.1Thetableprovidesastandardultravioletspectralirradiancedistributionthatmaybeemployedasaguideagainstwhichmanufacturedultravioletlightsourcesmaybejudgedwhenappliedtoindoorexposuretesting.Thetableprovidesareferenceforcomparisonwithnaturalsunlightultravioletspectraldata.Theultravioletreferencespectralirradianceisproviddedforthewavelengthrangefrom280to400nm.ThewavelengthregionselectediscomprisedoftheUV-Aspectralregionfrom320to400nmandtheUV-Bregionfrom280to320nm.1.2Thetabledefinesasingleultravioletsolarspectralirradiancedistribution:1.2.1Totalhemisphericalultravioletsolarspectralirradiance(consistingofcombineddirectanddiffusecomponents)incidentonasun-facing,37x00B0;tiltedsurfaceinthewavelengthregionfrom280to400nmforairmass1.05,atanelevationof2km(2000m)abovesealevelfortheUnitedStatesStandardAtmosphereprofilefor1976(USSA1976),exceptingfortheozonecontentwhichisspecifiedas0.30atmosphere-centimeters(atm-cm)equivalentthichkness.1.3ThedatacontainedinthesetablesweregeneratedusingtheSMARTS2Version2.9.2atmospherictransmissionmodeldevelopedbyGueymard(1,2).1.4Theclimatic,atmosphericandgeometricparametersselectedreflecttheconditionstoprovidearealisticmaximumultravioletexposureunderrepresentativeclearskyconditions.1.5TheavailabilityoftheSMARTS2model(asanadjunct(ADJG0173CD)tothisstandard)usedtogeneratethestandardspectraallowsuserstoevaluatespectraldifferencesrelativetothespectraspecifiedhere.
【中国标准分类号】:F12
【国际标准分类号】:17_180_20
【页数】:9P.;A4
【正文语种】:英语


【英文标准名称】:Methodfortheanalysisofoilseeds-Determinationofacidityoffat
【原文标准名称】:油料种子分析方法.第5部分:脂肪酸度测定
【标准号】:BS4289-5-1989
【标准状态】:现行
【国别】:英国
【发布日期】:1989-02-28
【实施或试行日期】:1989-02-28
【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】:植物油;食品作物;农作物;容量分析;酸滴定法;植物制品;种子(植物);脂肪;试验条件;油料种子;农产品;化学分析和试验
【英文主题词】:Acidimetry;Agriculturalproducts;Chemicalanalysisandtesting;Crops;Fats;Foodcrops;Oilseeds;Plantproducts;Seeds(plants);Testingconditions;Vegetableoils;Volumetricanalysis
【摘要】:FatisextractedinaccordancewithBS4289:Part4,dissolvedinhotethanolandtitratedwithaqueoussodiumorpotassiumhydroxide.
【中国标准分类号】:B33;B66
【国际标准分类号】:67_200_20
【页数】:4P.;A4
【正文语种】:英语