【英文标准名称】:StandardPracticeforDeterminationofOdorandTasteThresholdsByaForced-ChoiceAscendingConcentrationSeriesMethodofLimits
【原文标准名称】:用强制选择提升浓度限值系列法测定气味和味道阈限的标准实施规程
【标准号】:ASTME679-2004
【标准状态】:现行
【国别】:
【发布日期】:2004
【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】:E18.04
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:最终制品;工艺;浓度;嗅觉分析;品尝检验;最大值;试验
【英文主题词】:airpollution;ascendingmethodoflimits;odor;panel;sensoryevaluation;taste;threshold;waterpollution
【摘要】:Sensorythresholdsareusedtodeterminethepotentialofsubstancesatlowconcentrationstoimpartodor,taste,skinfeel,etc.tosomeformofmatter.Thresholdsareused,forexample,insettinglimitsforairpollution,innoiseabatement,inwatertreatment,andinfoodsystems.Thresholdsareusedtocharacterizeandcomparethesensitivityofindividualorgroupstogivenstimuli,forexample,inmedicine,inethnicstudies,andinthestudyofanimalspecies.1.1Thispracticedescribesarapidtestfordeterminingsensorythresholdsofanysubstanceinanymedium.1.2Itprescribesanoveralldesignofsamplepreparationandaprocedureforcalculatingtheresults.1.3Thethresholdmaybecharacterizedasbeingeither(a)onlydetection(awareness)thataverysmallamountofaddedsubstanceispresentbutnotnecessarilyrecognizable,or(b)recognitionofthenatureoftheaddedsubstance.1.4Themediummaybeagas,suchasair,aliquid,suchaswaterorsomebeverage,orasolidformofmatter.Themediummaybeodorlessortasteless,ormayexhibitacharacteristicodorortasteperse.1.5Thispracticedescribestheuseofamultipleforced-choicesamplepresentationmethodinanascendingconcentrationseries,similartothemethodoflimits.1.6Physicalmethodsofsamplepresentationforthresholddeterminationarenotapartofthispractice,andwilldependonthephysicalstate,size,shape,availability,andotherpropertiesofthesamples.1.7Itisrecognizedthatthedegreeoftrainingreceivedbyapanelwithaparticularsubstancemayhaveaprofoundinfluenceonthethresholdobtainedwiththatsubstance(1).1.8Thresholdsdeterminedbyusingonephysicalmethodofpresentationarenotnecessarilyequivalenttovaluesobtainedbyanothermethod.
【中国标准分类号】:X04
【国际标准分类号】:67_240
【页数】:7P.;A4
【正文语种】:


【英文标准名称】:Methodsoftestingplastics-Opticalandcolourproperties,weathering-Methodsofexposuretolaboratorylightsources,(xenonarclamp,enclosedcarbonarclamp,open-flamecarbonarclamp,fluorescenttubelamps)
【原文标准名称】:塑料的试验方法.风化条件下光学性能和颜色性能.实验室光源辐照方法,(氙弧灯、密封碳弧灯、敞口火焰碳弧灯、荧光灯)
【标准号】:BS2782-5Method540B-1982
【标准状态】:现行
【国别】:英国
【发布日期】:1982-02-26
【实施或试行日期】:1982-02-26
【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】:色度特征;人工气候环境试验;环境试验;材料的光学性质;染色试验;高聚物;塑料和橡胶技术;试验条件;风化;试样;塑料;光;加速度试验
【英文主题词】:Accelerationtests;Arclamps;Controlsamples;Exposure;Fluorescentlamps;Lamps;Light;Plastics;Specifications;Testing;Tests;Xenon
【摘要】:ThisInternationalStandardspecifiesmethodsforexposingspecimenstolaboratorylightsourcesinordertoassesschangesproducedbysuchexposure.Thefollowingtypesoflightsourceareincluded:a)xenonarclamp;b)enclosedcarbonarclamp;c)open-flamecarbonarclamp.Ofthedifferentlightsources,thexenonarcisadvantageousinthatitcan,whencorrectlyfilteredandmaintained,yieldaspec-trummostcloselyapproximatingtothatofdaylight.Thecar-bonarcsourcesyieldlightwhichisconsiderablydifferentfromdaylightandtheiruseisdecreasing.However,theyhavebeenfoundusefulforsomespecificpurposesandarestillincon-siderableuseinsomecountries;forthisreasontheyhavebeenincludedinthisInternationalStandard.ThisInternationalStandardalsospecifiesmeansofdeterminingradiationdosage.Forthemethodofdeterminationofchangesinpropertiesafterexposure,referenceismadetoISO4582.
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:20P;A4
【正文语种】:英语