【英文标准名称】:StandardTestMethodforMercaptanContentoftheAtmosphere
【原文标准名称】:大气中硫醇含量的标准试验方法
【标准号】:ASTMD2913-1996(2007)
【标准状态】:现行
【国别】:
【发布日期】:1996
【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】:D22.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:空气质量;硫醇;含量测定;试验;空气;职业安全;保健
【英文主题词】:ambientatmospheres;analysis;mercaptans;sampling
【摘要】:Mercaptansareodoroussubstancesoffensiveatlowconcentrationsandtoxicathigherlevels.Theyareemittedfromgeothermalsources,industrialprocesses,andfoodprocessingfacilities.1.1Thistestmethodcoversmeasurementoftheconcentrationofmercaptans(organicthiols)intheatmosphereatconcentrationsbelow100partsperbillion(ppb(v)=195956;g/m3).Forconcentrationsabove100ppb(v)level,thesamplingperiodcanbereducedortheliquidvolumeincreasedeitherbeforeorafteraspirating.Theminimumdetectableamountofmethylmercaptanis0.04956;g/mL(1)inafinalliquidvolumeof25mL.Whensamplingairatthemaximumrecommendedrateof2L/minfor2h,theminimumdetectablemercaptanconcentrationis1.0ppb(v)(1.95956;gmethylmercaptan/m3at101.3kPa(760mmHg)and25176;C).Thistestmethoddeterminestotalmercaptansanddoesnotdifferentiateamongindividualmercaptans,althoughitismostsensitivetothelowermolecularweightalkanethiols.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Specificprecautionarystatementsaregivenin8.7,8.8,andSection9.
【中国标准分类号】:Z15
【国际标准分类号】:13_040_20
【页数】:4P.;A4
【正文语种】:


【英文标准名称】:Seals.Elastomerbasemasticsusedforsealing.Determinationofweightstability.
【原文标准名称】:缝隙.密封缝隙用弹性胶泥.平衡稳定性测定
【标准号】:NFP85-503-1972
【标准状态】:现行
【国别】:法国
【发布日期】:1972-12-01
【实施或试行日期】:1972-11-27
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:Q24
【国际标准分类号】:91_100_50
【页数】:3P;A4
【正文语种】:其他