LY∕T 2904-2017 英文版 沉香

ICS79.080B70LYForestryIndustryStandardofthePeople’sRepublicofChinaLY/T2904—2017Agarwood沉香（EnglishTranslation）Issuedate:2017-10-27Implementationdate:2018-01-01IssuedbyStateForestryandGrasslandAdministrationofthePeople'sRepublicofChinaLY/T2904—2017IForewordSAC/TC41isinchargeofthisEnglishtranslation.IncaseofanydoubtaboutthecontentsofEnglishtranslation,theChineseoriginalshallbeconsideredauthoritative.ThisstandardisdraftedinaccordancewiththerulesgivenintheGB/T1.1—2009Directivesforstandardization—Part1:Structureanddraftingofstandards.ThisstandardwasproposedbytheEndangeredSpeciesImportandExportManagementOfficeofthePeople’sRepublicofChina.ThisstandardwaspreparedbySAC/TC41(NationalStandardizationTechnicalCommittee41onTimber,StandardizationAdministrationofChina).LY/T2904—2017IIIntroductionAquilariaspp.isincludedinAppendixIIofConventiononInternationalTradeinEndangeredSpeciesofWildFaunaandFlora(CITES),andAquilariasinensisislistedunderprotectionlevelⅡintheCatalogueoftheNationalProtectedKeyWildPlants(theFirstBatch)(1999)inChina.Thisstandardisdevelopedtoconserveandsustainablyuseagarwoodresources,andtopromotethehealthydevelopmentoftheagarwoodindustryinChina.LY/T2904—20171Agarwood1ScopeThisstandardspecifiesthetermsanddefinitions,requirements,testmethodanddeterminationofagarwood.Thisstandardisapplicabletotheinspectionandidentificationofagarwoodrawmaterialsandagarwoodproducts.2NormativereferencesThefollowingreferenceddocumentsareindispensablefortheapplicationofthisdocument.Fordatedreferences,onlytheeditioncitedapplies.Forundatedreferences,thelatesteditionofthereferenceddocument(includinganyamendments)applies.GB/T29894—2013GeneralmethodofwoodidentificationLY/T1788—2008Standardterminologyrelationgtowoodproperties3TermsanddefinitionsForthepurposesofthisdocument,thetermsanddefinitionsgiveninLY/T1788—2008andthefollowingapply.3.1AquilariaspeciesplantspeciesbelongingtotheAquilariagenusofThymelaeceaefamilyasperplanttaxonomy3.2AquilariawoodxylemtissueofAquilariaspecies3.3agarwoodnaturalmixturecomposedofxylemtissueanditssecretions,formedduringthegrowthoftreeofAquilariaspecies3.4LY/T2904—20172ethanolextractivesofagarwoodsubstancesextractedfromagarwoodwith95%ethanol,mainlyincluding2-(2-phenethyl)chromones,sesquiterpenes,aromaticcompoundsandfattyacids3.5referencesubstanceofagarwoodstandardmaterialusedforidentification,test,andcomparisonbythin-layerchromatography(TLC)andhighperformanceliquidchromatography(HPLC),preparedandcalibratedbyanationaldesignatedmetrologyorinspectionagency4RequirementsThexylemstructureandsecretionscharacteristicsofagarwoodshallconformtotherequirementsgiveninTable1.Table1RequirementsforxylemstructureandsecretionscharacteristicsofagarwoodTestitemsRequirementsXylemstructureMacrostructureDiffuseporous;growthringsareindistinct;theaxialparenchymaisusuallyabsentwithahandlens;thenumberofraysaremedium,veryfinetoslightlyfine;thenumberoftheincludedphloemislarge,visibletothenakedeye,distinctwithahandlensMicrostructureMainlyradialmultiplevessels,simpleperforationplates,alternateintervesselpitting;vessel-raypittingissimilartointervesselpitting;axialparenchymaisextremelyrare,vasicentric;fibersarethin-walled;raysaremostlyuniseriate,occasionallybiseriate;raysaremostlyone)rowsofsquareoruprightmarginalcellshomogeneousanduniseriate,withasmallnumberofheterogeneousIIIorIItype;includedphloemispresentinlargeamounts,foraminateorislandtypeSecretionsEthanolextractives≥10.0%LY/T2904—20173ChromogenicreactionCherry-red,purpleblue,lightred,orlightpurpleispermitted;colorlessorlightyellowisnotpermitted,shouldnotbecolorlessorlightyellowTLCFluorescentspotsshallappear,correspondinginpositionandcolortothoseinchromatogramofagarwoodreferencesubstanceHPLCcharacteristicchromatogram6characteristicpeaksshowninFigure1shallappear,correspondingtothoseinchromatogramofagarwoodreferencesubstance;retentiontimeofpeak1shallbeconsistentwiththatofagarwoodreferencesubstance01020304050602Retentiontime/min3561(Agarotetrol)4Figure1HPLCcharacteristicchromatogramofagarwood5Testmethod5.1Agarwoodxylemstructure5.1.1SamplingSamplingiscarriedoutfromperpendiculardirectiontothecross,radialandtangentialsection.Generally,thesizeshallbenolessthan10mm×10mm×10mm.Whentherequirementsarenotmet,thesamplingsizeshouldnotbelessthan5mm×5mm×5mm.5.1.2MacrostructurecharacteristicsLY/T2904—20174Observeandrecordthecolor,odor,texture,andstructurecharacteristicsofthewoodsample;observethewoodsamplewiththenakedeyeorhandlensof10×magnification,andrecordthecharacteristicsofheartwood,sapwood,growthrings,pores,axialparenchyma,rays,andincludedphloemfromthecrosssectionofthesample.RefertoAnnexAforthemacrostructurecharacteristicsofxylemofAquilariaspecies.5.1.3Microstructurecharacteristics5.1.3.1SofteningAccordingtotheprovisionsof5.2.1and5.2.2inGB/T29894-2013,thesamplesshallbesoftenedbytheboilingmethodortheglycerol-ethanolmethod.5.1.3.2PreparingsectionsPlacethesoftenedsampleonamicrotomeandcuttransverse,radial,andtangentialsectionswithathicknessof15~20µmrespectively;oruseasuitableknifetopreparesectionsbyhand.Themi