【英文标准名称】:Gasanalysis-Preparationofcalibrationgasmixturesusingdynamicvolumetricmethods-Part2:Volumetricpumps
【原文标准名称】:气体分析用动态容量法制备标定用混合气体第2部分：容量泵
【标准号】:ISO6145-2-2001
【标准状态】:现行
【国别】:国际
【发布日期】:2001-07
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC158
【标准类型】:()
【标准水平】:()
【中文主题词】:准备;混合气体;气体容量分析;控制样品;试验气体;气体分析
【英文主题词】:Controlsamples;Gasanalysis;Gasmixtures;Gas-volumetricanalysis;Preparation;Testgases
【摘要】:ThispartofISO6145specifiesamethodforthecontinuousproductionofcalibrationgasmixtures,containingtwoormorecomponents,frompuregasesorothergasmixturesbyuseofcommerciallyavailablemulti-piston,volumetricpumps.Pumpsofthistypemaybeemployedtopreparegasmixturesinwhichthevolumefractionsofthegaseouscomponentsinthecomplementarygasrangefrom0,1%upwards;therelativeexpandeduncertaintyofmeasure-ment,U,obtainedbymultiplyingtherelativecombinedstandarduncertaintybyacoveragefactork=2isnotgreaterthan0,5%.Lowerconcentrationsmaybeobtainedbycascadingvolumetricpumps,andthelowestvolumefractionachievablebymeansofatwo-pumpcascadeis10.Moreover,ifpre-mixedgasesareusedinsteadofpuregases,muchlowerconcentrationscanbeobtained.Themeritsofthismethodarethatalargequantityofthegasmixturecanbepreparedonacontinuousbasis,andthatmulticomponentmixturescanalsobereadilyprepared.
【中国标准分类号】:G85
【国际标准分类号】:71_040_40
【页数】:8P;A4
【正文语种】:英语