ASTM D7638-2010 甘油中脂肪酸和酯类测定的标准试验方法

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【英文标准名称】:StandardTestMethodforDeterminationofFattyAcidsandEstersinGlycerin
【原文标准名称】:甘油中脂肪酸和酯类测定的标准试验方法
【标准号】:ASTMD7638-2010
【标准状态】:现行
【国别】:
【发布日期】:2010
【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】:D15.93
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:防冻剂;发动机冷却液;乙烯;酯;脂肪酸;甘油;丙三醇;甘油(丙三醇);滴定
【英文主题词】:antifreeze;enginecoolant;ethylene;esters;fattyacids;glycerin;glycerine;glycerol;titrimetric
【摘要】:Anyresidualfattyacidandesters(FAx0026;E)shouldbepresentonlyatverylowlevelsinpurifiedglycerine.Thisprocedurerequirestheadditionofameasuredvolumeofsodiumhydroxide,inexcessoftheamountactuallyneededtoreactwithFAx0026;Eintheglycerinesample.Afterboiling,theexcesssodiumhydroxideisbacktitratedwithstandardizedhydrochloricacid.Thequantityofthesubstancebeingtitratediscalculatedasthedifferencebetweenthevolumesofthesodiumhydroxidesolutionoriginallyadded,correctedbymeansofablanktitration,andthatwasconsumedbythetitrantinthebacktitration.Note18212;Thestandardizedsolutionsforsodiumhydroxideandhydrochloricacidarecommerciallyavailable.1.1Thistestmethodprovidesthequantitativedeterminationofthefattyacidandestercontentinpurifiedglycerinbythetitrimetricmethod.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandardmayinvolvehazardousmaterials,operationsandequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecificprecautionsarelistedinSection8.
【中国标准分类号】:G17
【国际标准分类号】:71_080_60
【页数】:3P.;A4
【正文语种】: