ASTM UOP262-1999 分光光度计检测法测定石油产品中的酚和苯硫酚

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【英文标准名称】:PhenolsandThiophenolsinPetroleumProductsbySpectrophotometry
【原文标准名称】:分光光度计检测法测定石油产品中的酚和苯硫酚
【标准号】:ASTMUOP262-1999
【标准状态】:现行
【国别】:美国
【发布日期】:1999
【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】:
【标准类型】:(UOP)
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:Thismethodisfordeterminingphenolsandthiophenolsingasoline,refinerycausticsandcrudecresylicacidsderivedfromrefinerycaustics.Inthismethod,theterm"phenols"referstomixturesofphenol,cresols,xylenolsandotherphenoliccompoundsthataretypicallyfoundinthesesamples.Similarly,"thiophenols"referstotheanalogoussulfurcompounds.Themethodcanbeappliedtohigherboilingpetroleumfractionssuchaskerosinesanddieseloils,buttheresultsarebiasedlowandthusresultsbythismethodforsuchfractionsareconsideredsemi-quantitative.Thepresenceofhighconcentrationsofthiophenolswillinterferewiththedeterminationofphenolswhilehighconcentrationsofalkylmercaptanswillinterferewiththedeterminationofthiophenols.Aspecificdeterminationforphenolscanbemadeafterremovalofboththiophenolsandmercaptansbyextraction.Thequantitationrangeforphenolsis0.01to0.5mass-%ingasoline,0.01to40mass-%inrefinerycaustic,and0.1to10mass-%incrudecresylicacids.Thelowerquantitationlimitforthiophenolsingasolineis0.002mass-%.Duetothepossibilityofoxidationofthesulfur-containingcompounds,promptanalysisaftersamplingisrequiredtoobtaincorrectresults.
【中国标准分类号】:
【国际标准分类号】:
【页数】:13P.;A4
【正文语种】:英语