【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】: