ASTM D5768-2002(2006) 妥尔油脂肪酸碘值测定的标准试验方法
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【英文标准名称】:StandardTestMethodforDeterminationofIodineValueofTallOilFattyAcids
【原文标准名称】:妥尔油脂肪酸碘值测定的标准试验方法
【标准号】:ASTMD5768-2002(2006)
【标准状态】:现行
【国别】:
【发布日期】:2002
【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】:D01.34
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:油;碘;脂肪酸;试验方法
【英文主题词】:iodinevalue;talloilfattyacids
【摘要】:Theiodinevalueofafattyacidproductisameasureoftheunsaturatedfattyacidcontentofthatproductandconsequentlyameasureoftheeaseofoxidationordryingcapacityofthatfattyacidproduct.Thistestmethodmeasurestheunsaturationasiodinevaluebyadditionofaniodine/chlorinereagent.Theamountofreagentabsorbedisdeterminedbybacktitratingtheexcessreagentandcomparingittoablankdetermination.Insamplescontainingconjugateddoublebonds,theiodinevalueobtainedisempiricalsincethereagentdoesnotreactstoichiometricallywithconjugatedunsaturation.Wherenoconjugationispresent,theiodinevalueobtainedisameasureofthetotalunsaturation.Byusingproperspecimenweights,theempiricalvaluesobtainedareusefulforcomparativepurposes.Thistestmethodwasdevelopedinordertoreplacethehazardoussolvent,carbontetrachloride,usedinTestMethodD1959withthelesshazardousandmoreavailablesolvents,iso-octaneandcyclohexane.Asdataonthesatisfactoryuseofothersolventsbecomesavailable,thistestmethodwillbeamendedtoincludethosesolvents.Thistestmethodshouldhaveapplicabilitytofattyacidsandoilsotherthantalloilfattyacidbutthatpossibilityhasnotbeeninvestigated.1.1ThistestmethodcoverstheWijsprocedurefordeterminationofunsaturation(iodinevalue)oftalloilfattyacids.1.2Iodinevalueisameasureoftheunsaturationofoilsandfattyacidsandisexpressedintermsofthenumberofcentigramsofiodinepergramofsample(weightpercentofabsorbediodine).1.3Whenthistestmethodisusedtodeterminetheiodinevalueoffattyacidshavingconjugatedsystems,theresultisnotameasureoftotalunsaturated,butratherisanempiricalvaluethataffordsacomparisonofunsaturation.TotalunsaturationofconjugatedsystemsmaybemeasuredinaccordancewithTestMethodD1541.1.4Thetestmethoddescribedhereisnotreliablefortalloilfattyacidscontaininganappreciablequantityofrosin.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G52
【国际标准分类号】:87_060_20
【页数】:3P.;A4
【正文语种】:
【原文标准名称】:妥尔油脂肪酸碘值测定的标准试验方法
【标准号】:ASTMD5768-2002(2006)
【标准状态】:现行
【国别】:
【发布日期】:2002
【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】:D01.34
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:油;碘;脂肪酸;试验方法
【英文主题词】:iodinevalue;talloilfattyacids
【摘要】:Theiodinevalueofafattyacidproductisameasureoftheunsaturatedfattyacidcontentofthatproductandconsequentlyameasureoftheeaseofoxidationordryingcapacityofthatfattyacidproduct.Thistestmethodmeasurestheunsaturationasiodinevaluebyadditionofaniodine/chlorinereagent.Theamountofreagentabsorbedisdeterminedbybacktitratingtheexcessreagentandcomparingittoablankdetermination.Insamplescontainingconjugateddoublebonds,theiodinevalueobtainedisempiricalsincethereagentdoesnotreactstoichiometricallywithconjugatedunsaturation.Wherenoconjugationispresent,theiodinevalueobtainedisameasureofthetotalunsaturation.Byusingproperspecimenweights,theempiricalvaluesobtainedareusefulforcomparativepurposes.Thistestmethodwasdevelopedinordertoreplacethehazardoussolvent,carbontetrachloride,usedinTestMethodD1959withthelesshazardousandmoreavailablesolvents,iso-octaneandcyclohexane.Asdataonthesatisfactoryuseofothersolventsbecomesavailable,thistestmethodwillbeamendedtoincludethosesolvents.Thistestmethodshouldhaveapplicabilitytofattyacidsandoilsotherthantalloilfattyacidbutthatpossibilityhasnotbeeninvestigated.1.1ThistestmethodcoverstheWijsprocedurefordeterminationofunsaturation(iodinevalue)oftalloilfattyacids.1.2Iodinevalueisameasureoftheunsaturationofoilsandfattyacidsandisexpressedintermsofthenumberofcentigramsofiodinepergramofsample(weightpercentofabsorbediodine).1.3Whenthistestmethodisusedtodeterminetheiodinevalueoffattyacidshavingconjugatedsystems,theresultisnotameasureoftotalunsaturated,butratherisanempiricalvaluethataffordsacomparisonofunsaturation.TotalunsaturationofconjugatedsystemsmaybemeasuredinaccordancewithTestMethodD1541.1.4Thetestmethoddescribedhereisnotreliablefortalloilfattyacidscontaininganappreciablequantityofrosin.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G52
【国际标准分类号】:87_060_20
【页数】:3P.;A4
【正文语种】:
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