ASTM UOP565-2005 用滴定法测定酸值和环烷酸

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【英文标准名称】:AcidNumberandNaphthenicAcidsbyTitration
【原文标准名称】:用滴定法测定酸值和环烷酸
【标准号】:ASTMUOP565-2005
【标准状态】:现行
【国别】:美国
【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】:
【标准类型】:(UOP)
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:Thismethodisfordeterminingtheacidnumberofpetroleumproducts,petroleumdistillates,andsimilarmaterialsbypotentiometrictitration.Inorganicacids,organicacids,mercaptansandthiophenolsrespondtothisanalysis,buttheirrespectivesaltsdonot.Fornaphthenicacids,itisfrequentlydesiredtoincludethesaltsinthemeasurement.Therefore,aprocedureisalsoincludedforthedeterminationofsodiumnaphthenatesalts.Thetypicalrangeforacidnumberdeterminationis0.002to5mgKOH/gofsample,althoughhigherconcentrationscanbeaccommodated.Therearethreeproceduresincludedinthemethod.Theacidnumberofasamplecanbedeterminedonanas-receivedbasisoronamercaptan-andthiophenol-freebasis.Themethodcanalsobeusedtodeterminenaphthenicacidsincludingsodiumnaphthenates(soaps)incaustic-washedhydrocarbons.Foranestimatedrelativemolecularmassof130,therangeofquantitationfornaphthenicacidsis5to500mass-ppm.Thelattertwoproceduresapplyalmostexclusivelytolightkerosinesandgasoilswhereitisassumedthattheorganicacidsareentirelynaphthenic.Ifnopotentiometrictitratorisavailable,andthesampleislightincolor,thetitrationmaybeperformedcolorimetrically;seetheAPPENDIX.
【中国标准分类号】:
【国际标准分类号】:
【页数】:13P.;A4
【正文语种】:英语