ASTM D1926-2000(2006) 纤维素羧基含量的测试方法
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【英文标准名称】:StandardTestMethodsforCarboxylContentofCellulose
【原文标准名称】:纤维素羧基含量的测试方法
【标准号】:ASTMD1926-2000(2006)
【标准状态】:现行
【国别】:
【发布日期】:2000
【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】:D01.36
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:纤维素;试验;含量测定
【英文主题词】:carboxylcontent;cellulose;ionexchangecapacity;methylenebluemethod;sodiumchloride/sodiumbicarbonatemethod
【摘要】:Thesetestmethodsmeasuretheamountofcarboxylgroupspresentinwoodorcottonlinterpulp.Carboxylgroupsareindicativeofthesurfacechargeofthepulpwhichisaveryimportantquantityforuseinthepapermakingindustry.1.1Thesetestmethodscoverthedeterminationofthecarboxylcontent,orion-exchangecapacity,ofcellulosefromanysource.Twotestmethodsaredescribed,thesodiumchloride-sodiumbicarbonatemethod()andthemethylenebluemethod().Thetestmethodsmustbeusedwithintheirlimitations,anditmustberecognizedthatthereisnowayofdeterminingtheaccuracyofanymethodforthedeterminationofcarboxyl.Theprecisionofthesodiumchloride-sodiumbicarbonatemethodislowinthelowerrangeofcarboxylvalues.Themethylenebluemethodcanbeusedoverthewholerangeofcarboxylvalues;itisespeciallyusefulinthelowrange.Itisnotapplicabletothedeterminationofcarboxylinsolublecarbohydratematerial.Althoughthesetestmethodsmaybeusedtodeterminetheion-exchangecapacityofunbleachedpulps,theresidualligninwillcauseanundeterminederror,especiallythesulfonicacidgroupsinunbleachedsulfitepulps().1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Y31
【国际标准分类号】:85_040
【页数】:4P.;A4
【正文语种】:
【原文标准名称】:纤维素羧基含量的测试方法
【标准号】:ASTMD1926-2000(2006)
【标准状态】:现行
【国别】:
【发布日期】:2000
【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】:D01.36
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:纤维素;试验;含量测定
【英文主题词】:carboxylcontent;cellulose;ionexchangecapacity;methylenebluemethod;sodiumchloride/sodiumbicarbonatemethod
【摘要】:Thesetestmethodsmeasuretheamountofcarboxylgroupspresentinwoodorcottonlinterpulp.Carboxylgroupsareindicativeofthesurfacechargeofthepulpwhichisaveryimportantquantityforuseinthepapermakingindustry.1.1Thesetestmethodscoverthedeterminationofthecarboxylcontent,orion-exchangecapacity,ofcellulosefromanysource.Twotestmethodsaredescribed,thesodiumchloride-sodiumbicarbonatemethod()andthemethylenebluemethod().Thetestmethodsmustbeusedwithintheirlimitations,anditmustberecognizedthatthereisnowayofdeterminingtheaccuracyofanymethodforthedeterminationofcarboxyl.Theprecisionofthesodiumchloride-sodiumbicarbonatemethodislowinthelowerrangeofcarboxylvalues.Themethylenebluemethodcanbeusedoverthewholerangeofcarboxylvalues;itisespeciallyusefulinthelowrange.Itisnotapplicabletothedeterminationofcarboxylinsolublecarbohydratematerial.Althoughthesetestmethodsmaybeusedtodeterminetheion-exchangecapacityofunbleachedpulps,theresidualligninwillcauseanundeterminederror,especiallythesulfonicacidgroupsinunbleachedsulfitepulps().1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Y31
【国际标准分类号】:85_040
【页数】:4P.;A4
【正文语种】:
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