【英文标准名称】:StandardPracticeforPreparationofBiomassforCompositionalAnalysis
【原文标准名称】:化合物分析用生物物质制备的标准实施规范
【标准号】:ASTME1757-2001(2007)
【标准状态】:现行
【国别】:美国
【发布日期】:2001
【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】:E48.05
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:biomass;fermentationresidue;hardwood;herbaceous;softwood;wastepaper;Bagasse;Biomass;Boxboard;Compositionanalysis;Cornstover;Feedstock;Fermentationcycles;Hardwoods;Herbaceousmaterials;Millingprocesses;Newspaper/newsprint;Woodpr
【摘要】:PreparationMethodA8212;Methodsuitableforthepreparationoflargequantities(>20g)offieldcollectedsamplesintoaformappropriateforcompositionalanalysis.Woodysamplesmustfirstbeavailableaschipsofanominal5by5by0.6cm(2by2byx00BC;in.)orlessandtwigsnotexceeding0.6cm(x00BC;in.)diameter.Herbaceousmaterialsmaybeprocessedaswholestraw.Itisrecommendedthatwastepapershouldbeshreddedintopieceslessthen1cm(x00BD;in.)wide.Furthermore,itisrecommendedthattwigs,strawandwastepapershouldnotexceed61cm(24in.)inlengthtofacilitatehandling.PreparationMethodsBandC8212;Testmethodsaresuitableforverymoistfeedstocks,samplesthatwouldnotbestableduringprolongedexposuretoambientconditions,orfordryingmaterialswhenroomconditionsdeviatefromtheambientconditionsdescribedin3.1.1.Thesetestmethodsarealsosuitableforhandlingsmallsamplesofbiomass(x003C;20g).Thedryingstepisdoneinaconvectionovenat45x00B0;C(TestMethodB)orbylyophilization(TestMethodC).Thispracticeisnotintendedformaterialsthatwillalreadypassthrougha20meshsieveorcannotbedriedbythedescribedmethodstoatotalsolidscontentofgreaterthen85%,basedonanovendriedweight.Thispracticewillseparatethemilledmaterialintotwofractions,ax2212;20/+80meshfractionandax2212;80meshfraction.Extraneousinorganicmaterialswillaccumulateinthe-80meshfractionanditshouldbeanalyzedindependentlyfromthe-20/+80meshfraction.Weightedresultsfromthetwofractionscanthenbecombinedtoobtainresultsformaterialsonan"asreceived"basis.Note18212;Duringanalysis,theveryfineconsistencyofthe-80meshfractionmaycauseproblemsinfilteringoperationsandshouldbehandledappropriately.1.1Thispracticecoversareproduciblewaytoconverthardwoods,softwoods,herbaceousmaterials(suchasswitchgrassandsericea),agriculturalresidues(suchascornstover,wheatstraw,andbagasse),wastepaper(suchasofficewaste,boxboard,andnewsprint),feedstockspretreatedtoimprovesuitabilityforfermentationandfermentationresiduesintoauniformmaterialsuitableforcompositionalanalysis.1.2Millingandsievingactionsbothproducelargeamountsofdust.Thisdustcanbeanuisancehazardandirritant.Useappropriaterespiratoryprotectionasneeded.Ifexcessiveamountsofdustareallowedtobecomeairborneapotentialexplosionhazardispossible.Provideappropriatedustcontrolmeasuresasneeded.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Theinch-poundunitsgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:B04
【国际标准分类号】:65_040_20
【页数】:4P.;A4
【正文语种】:英语