Designation:E1757−19StandardPracticeforPreparationofBiomassforCompositionalAnalysis1ThisstandardisissuedunderthefixeddesignationE1757;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversareproduciblewaytoconverthardwoods,softwoods,herbaceousmaterials(suchasswitch-grassandsericea),agriculturalresidues(suchascornstover,wheatstraw,andbagasse),wastepaper(suchasofficewaste,boxboard,andnewsprint),cellulosicfeedstockspretreatedtoimprovesuitabilityforfermentation,cerealgrains,cerealgrainfermentationmash,cerealgrainfermentationbeer,andfermen-tationresiduesintoauniformmaterialsuitableforcomposi-tionalanalysis.Thispracticeisintendedforsamplesthatneedtobedriedpriortoanalysis.1.2Millingandsievingactionsbothproducelargeamountsofdust.Thisdustcanbeanuisancehazardandirritant.Useappropriaterespiratoryprotectionasneeded.Ifexcessiveamountsofdustareallowedtobecomeairborneapotentialexplosionhazardispossible.Provideappropriatedustcontrolmeasuresasneeded.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesafterSIunitsareprovidedforinformationonlyandarenotconsideredstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2E11SpecificationforWovenWireTestSieveClothandTestSieves2.2OtherDocuments:AOAC935.29Moist...
