ASTM D3971-1989(2010) 纤维素中二氯甲烷可溶物的标准试验方法

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【英文标准名称】:StandardTestMethodforDichloromethane-SolubleMatterinCellulose
【原文标准名称】:纤维素中二氯甲烷可溶物的标准试验方法
【标准号】:ASTMD3971-1989(2010)
【标准状态】:现行
【国别】:美国
【发布日期】:1989
【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】:
【英文主题词】:dissolvingtypesofcellulosepulps;extractives;fat;removalefficiencyofbleachingandpulping;resin;soxhlet;wax;Celluloseandcellulosederivatives;Dichloromethane;Extractivescontent
【摘要】:Dichloromethane-solublematerialsaretypicallyreferredtoasextractives.Theseextractivesarecomprisedoforganicmaterialsthatoriginatedinthewoodorcotton.Themeasureisanindicationoftheefficiencyofremovalofthesesubstancesduringpulpingandbleaching.Theextractivelevelisofconcerntodissolvingpulpuserssincethepresenceoflargeamountsofextractivescouldinhibittheprocessingofcelluloseintothedesiredderivative.1.1Thistestmethodcoversthedeterminationofdichloromethane-solublematterincelluloseandisapplicabletodissolving-typecellulosepulpspreparedfromcottonorwood.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Y30
【国际标准分类号】:85_040
【页数】:2P.;A4
【正文语种】:英语