ASTM E2193-2008 单乙二醇的紫外线透射率的标准试验方法(紫外线光谱测定法)
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【英文标准名称】:StandardTestMethodforUltravioletTransmittanceofMonoethyleneGlycol(UltravioletSpectrophotometricMethod)
【原文标准名称】:单乙二醇的紫外线透射率的标准试验方法(紫外线光谱测定法)
【标准号】:ASTME2193-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:E15.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:monoethyleneglycol;spectrophotometric;ultraviolettransmittance;Monoethyleneglycol(MEG);Spectrophotometry--ultraviolet;Transmittanceandreflectance;Ultraviolet(UV)spectrochemicalanalysis
【摘要】:Knowledgeoftheultraviolettransmittanceofmonoethyleneglycolisrequiredtoestablishwhethertheproductmeetstherequirementsofitsqualityspecifications.Dissolvedoxygeninorganicsolvents,suchasMEG,formscomplexesthatshiftthesolventabsorptionfromthevacuumultravioletrangeintothemeasurableUVrange(near190to250nm).MonoethyleneglycolhasaUVabsorptionpeakat180nm.ForMEG-oxygencomplexes,thispeakisshiftedtoalongerwavelength,thusincreasingtheabsorbabilityat220nm.However,thiseffectisnotobservedinwater.Thereisnosignificantmeasurableeffectduetodissolvedoxygeninwaterthatwouldrequirenitrogenspargingpriortousingforcollectionofthereferencespectrum.Nitrogenspargingandre-measurementofsuspectorborderlineglycolsamplesat220nmcanbeusedasatooltoruleoutorconfirmthepresenceofUVaffectingcontaminantsotherthanoxygen.1.1Thistestmethodcoversaprocedureforthedeterminationofthetransmittanceofmonoethyleneglycol(1,2-ethanediol;MEG)atwavelengthsintheregion220to350nm.Theresultsprovideameasureofthepurityofthesamplewithrespecttoultravioletabsorbingcompounds.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.4ReviewthecurrentMaterialSafetyDataSheets(MSDS)fordetailedinformationconcerningtoxicity,firstaidprocedures,andsafetyprecautions.
【中国标准分类号】:G17
【国际标准分类号】:71_040_50
【页数】:5P.;A4
【正文语种】:英语
【原文标准名称】:单乙二醇的紫外线透射率的标准试验方法(紫外线光谱测定法)
【标准号】:ASTME2193-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:E15.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:monoethyleneglycol;spectrophotometric;ultraviolettransmittance;Monoethyleneglycol(MEG);Spectrophotometry--ultraviolet;Transmittanceandreflectance;Ultraviolet(UV)spectrochemicalanalysis
【摘要】:Knowledgeoftheultraviolettransmittanceofmonoethyleneglycolisrequiredtoestablishwhethertheproductmeetstherequirementsofitsqualityspecifications.Dissolvedoxygeninorganicsolvents,suchasMEG,formscomplexesthatshiftthesolventabsorptionfromthevacuumultravioletrangeintothemeasurableUVrange(near190to250nm).MonoethyleneglycolhasaUVabsorptionpeakat180nm.ForMEG-oxygencomplexes,thispeakisshiftedtoalongerwavelength,thusincreasingtheabsorbabilityat220nm.However,thiseffectisnotobservedinwater.Thereisnosignificantmeasurableeffectduetodissolvedoxygeninwaterthatwouldrequirenitrogenspargingpriortousingforcollectionofthereferencespectrum.Nitrogenspargingandre-measurementofsuspectorborderlineglycolsamplesat220nmcanbeusedasatooltoruleoutorconfirmthepresenceofUVaffectingcontaminantsotherthanoxygen.1.1Thistestmethodcoversaprocedureforthedeterminationofthetransmittanceofmonoethyleneglycol(1,2-ethanediol;MEG)atwavelengthsintheregion220to350nm.Theresultsprovideameasureofthepurityofthesamplewithrespecttoultravioletabsorbingcompounds.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.4ReviewthecurrentMaterialSafetyDataSheets(MSDS)fordetailedinformationconcerningtoxicity,firstaidprocedures,andsafetyprecautions.
【中国标准分类号】:G17
【国际标准分类号】:71_040_50
【页数】:5P.;A4
【正文语种】:英语
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