【英文标准名称】:StandardTestMethodforColorofClearLiquids(Platinum-CobaltScale)
【原文标准名称】:透明液体色度的标准试验方法(铂钴标度)
【标准号】:ASTMD1209-2005(2011)
【标准状态】:现行
【国别】:
【发布日期】:2005
【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】:D01.35
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:透明液体;颜色;颜色-有机/无机化合物;铂-鈷比例
【英文主题词】:clearliquids;color;Color--organic/inorganicchemicals;Platinum-cobaltscale
【摘要】:Thepropertyofcolorofasolventvariesinimportancewiththeapplicationforwhichitisintended,theamountofcolorthatcanbetoleratedbeingdependentonthecolorcharacteristicsofthematerialinwhichitisused.Thepaint,varnish,andlacquersolvents,ordiluentscommerciallyavailableontoday''smarketnormallyhavelittleornocolor.Thepresenceorabsenceofcolorinsuchmaterialisanindicationofthedegreeofrefinementtowhichthesolventhasbeensubjectedorofthecleanlinessoftheshippingorstoragecontainerinwhichitishandled,orboth.Foranumberofyearsthetermx201C;water-whitex201D;wasconsideredsufficientasameasurementofsolventcolor.Severalexpressionsfordefiningx201C;water-whitex201D;graduallyappearedanditbecameevidentthatamoreprecisecolorstandardwasneeded.Thiswasaccomplishedin1952withtheadoptionofTestMethodD1209usingtheplatinum-cobaltscale.ThistestmethodissimilartothedescriptiongiveninStandardMethodsfortheExaminationofWaterandWasteWaterandisreferredtobymanyasx201C;APHAColor.x201D;Thepreparationoftheseplatinum-cobaltcolorstandardswasoriginallydescribedbyA.HazenintheAmericanChemicalJournalinwhichheassignedthenumber5(partspertenthousand)tohisplatinum-cobaltstocksolution.Subsequently,intheirfirstedition(1905)ofStandardMethodsfortheExaminationofWater,theAmericanPublicHealthAssociation,usingexactlythesameconcentrationofreagents,assignedthecolordesignation500(partspermillion)whichisthesameratio.Thepartspermillionnomenclatureisnotusedsincecolorisnotreferreddirectlytoaweightrelationship.Itisthereforerecommendedthattheincorrecttermx201C;HazenColorx201D;shouldnotbeused.Also,becauseitrefersprimarilytowater,thetermx201C;APHAColorx201D;isundesirable.Therecommendednomenclatureforreferringtothecoloroforganicliquidsisx201C;Platinum-CobaltColor,TestMethodD1209.x201D;ThepetroleumindustryusestheSayboltcolorimeterTestMethodD156formeasuringanddefiningthecolorofhydrocarbonsolvents;however,thissystemofcolormeasurementisnotcommonlyemployedoutsideofthepetroleumindustry.IthasbeenreportedbyvarioussourcesthataSayboltcolorof+25isequivalentto25intheplatinum-cobaltsystemortocolorsproducedbymassesofpotassiumdichromaterangingbetween4.8and5.6mgdissolvedin1Lofdistilledwater.Becauseofthedifferencesinthespectralcharacteristicsoftheseveralcolorsystemsbeingcomparedandthesubjectivemannerinwhichthemeasurementsaremade,exactequivalenciesaredifficulttoobtain.1.1Thistestmethoddescribesaprocedureforthevisualmeasurementofthecolorofessentiallylightcoloredliquids(Note1).Itisapplicableonlytomaterialsinwhichthecolor-producingbodiespresenthavelightabsorptioncharacteristicsnearlyidenticalwiththoseoftheplatinum-cobaltcolorstandardsused.Note18212;Aprocedureforestimatingcolorofdarkerliquids,describedforsolublenitrocel......
【中国标准分类号】:G51
【国际标准分类号】:87_040
【页数】:4P.;A4
【正文语种】:
基本信息
标准名称: | 铁路信号产品可靠性要求评定方法 |
中标分类: |
铁路 >>
铁路信号 >>
铁路信号综合 |
发布部门: | 中华人民共和国铁道部 |
发布日期: | 1993-12-18 |
实施日期: | 1994-07-01 |
首发日期: | |
作废日期: | |
提出单位: | 铁路部标准计量研究所 |
归口单位: | 铁路部标准计量研究所 |
起草单位: | 铁路部标准计量研究所、中国铁路通信信号总公司研究设计院等 |
出版社: | 中国铁道出版社 |
出版日期: | 1994-07-01 |
页数: | 17页 |
适用范围
本标准规定了铁路信号产品可靠性要求的术语、考核评定目的和确定评定方法的原则、失效的分类和判据、信号产品可靠性指标、可靠性试验方法。
本标准适用于新的具有可靠性指标的铁路信号产品的设计、生产和使用。既有铁路信号产品确定可靠性指标的考核也可参照执行。
前言
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目录
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引用标准
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所属分类: 铁路 铁路信号 铁路信号综合