ISO 00975-2021.docx
INTERNATIONA1.STANDARDISO975editionFifth2O21-1.2Browncoa1.sand1.ignites一Determinationofyie1.dofbenzene-so1.ub1.eextractSemi-automaticmethodCharbonsbrunset1.ignitesDeterminationdurendementenextraitdebenzeneso1.ub1.eMethodeSembautomatiqueRSacncc¾iW1.(E)©ISO2021COPYRIGHTPROTECTEDDOCUMENT©ISO2021IUirhM*hedbdi1.iUedotherwiseupdhi.o啪InyM1.ttti0oemhxitronio»ktu-Dkirietf1.vMqnIrHHBt1.Onmaytheinternetoranintranet,withoutpriorwrittenpermission.PermissioncanberequestedfromeitherISOattheaddressbe1.oworISO'smemberbodyinthecountr)oftherequester.f),WV>fifiU81.andonnet8CH-1214Vernier,GenevaPhone：M1.22749O1.11觥曲ite：图洲跳触OQrgPub1.ishedinSwitzer1.andContentsPageForeword_ivIntroductionv2 Scope13 Normativereferences14 Termsanddefinitions15 P6 Reagent17 Apparatus18 Preparationofsamp1.e2Pre1.iminaryadjustmentOfinstrument28.1 Adjustmentoftheextractiontemperature28.2 Se1.ectionofperiodsofextraction,rinsingandevaporation一.29I。Ca1.cu1.ationandexpressionofresu1.ts3Precision410.1Repeatabi1.ity1.imit41110.2Reproducibi1.ity1.imit4TeeStreport4ForewordISO(theInternationa1.OrganizationforStandardization)isawor1.dwidefederationofnationa1.standardsttiugh(ISOmrtm匕0)bMdmi)rwcekdHPfff1.QbbGgbodyI1tf1.nmtiJMiai6sndrifc3owhtd1.ysQcchit2committeehasbeenestab1.ishedhastherighttoberepresentedonthatcommittee.Internationa1.organizations,governmenta1.andnon-governmenta1.,in1.iaisonwithISO,a1.sotakepartinthework.ISOco1.1.aboratesc1.ose1.ywiththee1.ectrotechnica1.standardization.Internationa1.E1.ectrotechnica1.Commission(IEC)ona1.1.mattersofTheproceduresusedtodeve1.opthisdocumentandthoseintendedforitsfurthermaintenanceareof1.SO1.EC(VifY1的Mtheeditoria1.ru1.esoftheISO/IECDirectives,Part2(secwww.iso.org/direc1.ives).时歌Onrightsd随秘姐n棍蜘琳蛾ns由能献吸灰创微盘口府doc1.三棉犯鼠跟监ssubjectofanypatentrightsidentifiedduringthedeve1.opmerUW4io÷uwMM41.beintheIntroductionand/orontheISO1.istofpatentdec1.arationsreceived(seewww.iso.org/patents).Anytradeusedinthisconstitutenameendorsement,documentisinformationgivenfortheconvenienceofusersanddoesnotForanexp1.anationofthevo1.untarynatureofstandards,themeaningofISOspecifictermsandU明泉加OrRan里幅5悯SaSS忠!S窿inwJ憎ftknBar池部Udead焦¾es地w¼w.isO.orgisoforeword.htm1.帏田。祈盼册5肽炉spreparedbyTechnica1.CommitteeISO/TC27,Coa1.andcoke1.SubcommitteeSC5,Thisfiftheditioncance1.sandrep1.acesthefourthedition(ISO975:2013),ofwhichitconstitutesaminorrevision.Thechangescomparedtothepreviouseditionareasfo1.1.ows： referenceddocumentshavebeenupdated; termsanddefinitionshavebeenadded; samp1.ehasbeenadded; ca1.cu1.ationandexpressionofresu1.tshavebeenamended； precisionhasbeenamended; testreporthasbeenamended.AnyfeedbackorquestionsonthisdocumentShWUd跖小毛&:皿。th。use1.inationa1.standardsbody.Acomp1.ete1.istingofthesebodiescanbefoundatwww.iso.org/members.htm1.IntroductionThedeterminationofyie1.dofbenzene-so1.ub1.eextractiscarriedoutusingasemi-automaticinstrument;C间UtjQeIocMtininginwrnuiiU)itt&rin!raiificevaaMt2rti>M1.iAJ1.y.1.ongasthesamp1.eisputintheextractionBrowncoa1.sand1.ignitesDeterminationofyie1.dofbenzene-so1.ub1.eextractSemi-automaticmethod1 ScopeThisdocumentspecifiesasemi-automaticmethodfordeterminationoftheyie1.dofbenzene-so1.ub1.e2(tractNd11bative<r'e11fpeses.阙网帆神眼9fAhtsQwnt.蚓则nref<to降期射用eediH6na11QS1.ies.肺entundatedreferences,the1.atesteditionofthereferenceddocument(inc1.udinganyamendments)app1.ies.RMhOd出他Ri1.Ire/sUPPG依屏桧SamP1.eDaerminQHOnofmoisturecontentPart2:IndirectgravimetricISO13909-4,Hardcoa1.andcokeMechanica1.samp1.ingPart4:Coa1.Prepardtionoftestsamp1.esKdefoiitio11UO/samp1.ingNotermsanddefinitionsare1.istedinthisdocument.ISOandIECmaintaintermino1.ogica1.databasesforuseinstandardizationatthefo1.1.owingaddresses:ISOOn1.inebrowsingp1.atform:avai1.ab1.eathps:/WW*.iM>.c>Fg/ObPIECE1.ectropedia:avai1.ab1.eathttps:/www.e1.ectropedia.org/4 Princip1.eAtestportionofthebrowncoa1.or1.igniteisextractedwithbenzeneinasemi-automaticextraction,irt11<niIteofs(HvnBewethb1.ereHXtvecib5,cUf1.ptawdndthBtbriut6oidueresidueafa*ri9tgurtdriass.reportedonthedrybasis.5 Reagent5.1Benzene,ofana1.ytica1.reagentgrade,p20=0,876gm1.,disti1.1.ationrange80to81,At1.east1vtenzenier,Ys8e11ammab1.eandtoxicbyinha1.ation,ingestionorskinabsorption.Thetestmustbecarriedoutinahoodandthebenzenemustberecoveredascomp1.ete1.yaspossib1.e.6 Apparatus6.1 Semi-automaticextractioninstrument,containingmain1.ytwounits:thecontinuousconsistsOf100m1.deviceandthecontro1.1.er.Theandacondenser.Thedericeextrac1.ion-cvaporationconica1.f1.ask,anextractionChambercontinuousextrac1.ion-evaporationcharnber©ISO2021-AHrightsreserved1Ifc(IaQthmmvta丽SndSfHhcdininrdnnd1.aiftts111.itapnetidn(Iaui¢eratvrttarqutfkbt1.thttiighextivrtaodnchamber.12madeE3ftWtftyftthimb1.
