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1、INTERNATIONA1.STANDARDISO975editionFifth2O21-1.2Browncoa1.sand1.ignites一Determinationofyie1.dofbenzene-so1.ub1.eextractSemi-automaticmethodCharbonsbrunset1.ignitesDeterminationdurendementenextraitdebenzeneso1.ub1.eMethodeSembautomatiqueRSacncciW1.(E)ISO2021COPYRIGHTPROTECTEDDOCUMENTISO2021IUirhM*hed
2、bdi1.iUedotherwiseupdhi.o啪InyM1.ttti0oemhxitronioktu-Dkirietf1.vMqnIrHHBt1.Onmaytheinternetoranintranet,withoutpriorwrittenpermission.PermissioncanberequestedfromeitherISOattheaddressbe1.oworISOsmemberbodyinthecountr)oftherequester.f),WVfifiU81.andonnet8CH-1214Vernier,GenevaPhone：M1.22749O1.11觥曲ite：
3、图洲跳触OQrgPub1.ishedinSwitzer1.andContentsPageForeword_ivIntroductionv2 Scope13 Normativereferences14 Termsanddefinitions15 P6 Reagent17 Apparatus18 Preparationofsamp1.e2Pre1.iminaryadjustmentOfinstrument28.1 Adjustmentoftheextractiontemperature28.2 Se1.ectionofperiodsofextraction,rinsingandevaporatio
4、n一.29I。Ca1.cu1.ationandexpressionofresu1.ts3Precision410.1Repeatabi1.ity1.imit41110.2Reproducibi1.ity1.imit4TeeStreport4ForewordISO(theInternationa1.OrganizationforStandardization)isawor1.dwidefederationofnationa1.standardsttiugh(ISOmrtm匕0)bMdmi)rwcekdHPfff1.QbbGgbodyI1tf1.nmtiJMiai6sndrifc3owhtd1.y
5、sQcchit2committeehasbeenestab1.ishedhastherighttoberepresentedonthatcommittee.Internationa1.organizations,governmenta1.andnon-governmenta1.,in1.iaisonwithISO,a1.sotakepartinthework.ISOco1.1.aboratesc1.ose1.ywiththee1.ectrotechnica1.standardization.Internationa1.E1.ectrotechnica1.Commission(IEC)ona1.
6、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.opmerUW4iouwMM41.bein
7、theIntroductionand/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f
8、tknBar池部Udead焦es地ww.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： referenceddocumentshave
9、beenupdated; termsanddefinitionshavebeenadded; samp1.ehasbeenadded; ca1.cu1.ationandexpressionofresu1.tshavebeenamended； precisionhasbeenamended; testreporthasbeenamended.AnyfeedbackorquestionsonthisdocumentShWUd跖小毛&:皿。th。use1.inationa1.standardsbody.Acomp1.ete1.istingofthesebodiescanbefoundatwww.is
10、o.org/members.htm1.IntroductionThedeterminationofyie1.dofbenzene-so1.ub1.eextractiscarriedoutusingasemi-automaticinstrument;C间UtjQeIocMtininginwrnuiiU)itt&rin!raiificevaaMt2rtiM1.iAJ1.y.1.ongasthesamp1.eisputintheextractionBrowncoa1.sand1.ignitesDeterminationofyie1.dofbenzene-so1.ub1.eextractSemi-au
11、tomaticmethod1 ScopeThisdocumentspecifiesasemi-automaticmethodfordeterminationoftheyie1.dofbenzene-so1.ub1.e2(tractNd11bativere11fpeses.阙网帆神眼9fAhtsQwnt.蚓则nref.cFg/ObPIECE1.ectropedia:avai1.ab1.eathttps:/www.e1.ectropedia.org/4 Princip1.eAtestportionofthebrowncoa1.or1.igniteisextractedwithbenzeneinas
12、emi-automaticextraction,irt11niIteofs(HvnBewethb1.ereHXtvecib5,cUf1.ptawdndthBtbriut6oidueresidueafa*ri9tgurtdriass.reportedonthedrybasis.5 Reagent5.1Benzene,ofana1.ytica1.reagentgrade,p20=0,876gm1.,disti1.1.ationrange80to81,At1.east1vtenzenier,Ys8e11ammab1.eandtoxicbyinha1.ation,ingestionorskinabso
13、rption.Thetestmustbecarriedoutinahoodandthebenzenemustberecoveredascomp1.ete1.yaspossib1.e.6 Apparatus6.1 Semi-automaticextractioninstrument,containingmain1.ytwounits:thecontinuousconsistsOf100m1.deviceandthecontro1.1.er.Theandacondenser.Thedericeextrac1.ion-cvaporationconica1.f1.ask,anextractionChambercontinuousextrac1.ion-evaporationcharnberISO2021-AHrightsreserved1Ifc(IaQthmmvta丽SndSfHhcdininrdnnd1.aiftts111.itapnetidn(Iauieratvrttarqutfkbt1.thttiighextivrtaodnchamber.12madeE3ftWtftyftthimb1.
