1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS 5743:2000 ISO 3402:199
2、9 ICS 65.160 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Tobacco and tobacco products Atmosphere for conditioning and testingThis British Standard, having been prepared under the direction of the Consumer Products and Services Sector Committee, was published under the auth
3、ority of the Standards Committee and comes into effect on 15 April 2000 BSI 04-2000 ISBN 0 580 34721 4 BS 5743:2000 Amendments issued since publication Amd. No. Date Comments National foreword This British Standard reproduces verbatim ISO 3402:1999 and implements it as the UK national standard. It s
4、upersedes BS 5743:1991 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee AW/40, Tobacco and tobacco products, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquirie
5、s on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British
6、 Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British S
7、tandard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cov
8、er, an inside front cover, the ISO title page, pages ii to iv, pages 1 to 4, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.Referencenumber ISO3402:1999(E) INTERNATIONAL STANDARD ISO 3402 Fourthedition 1999-12-15
9、 Tobaccoandtobaccoproducts Atmosphereforconditioningandtesting Tabac et produits du tabac Atmosphre de conditionnement et dessai BS 5743:2000ii BS 5743:2000 iii Foreword ISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISO memberbodies).Theworkofprep
10、aringInternationalStandardsisnormallycarriedoutthroughISOtechnical committees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas therighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmental,in liaisonwithISO,alsotakepartinthework.I
11、SOcollaboratescloselywiththeInternationalElectrotechnical Commission(IEC)onallmattersofelectrotechnicalstandardization. InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/IECDirectives,Part3. DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtothememberbodiesf
12、orvoting. PublicationasanInternationalStandardrequiresapprovalbyatleast75%ofthememberbodiescastingavote. AttentionisdrawntothepossibilitythatsomeoftheelementsofthisInternationalStandardmaybethesubjectof patentrights.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights. InternationalSta
13、ndardISO3402waspreparedbyTechnicalCommitteeISO/TC126, Tobacco and tobacco products. Thisfourtheditioncancelsandreplacesthethirdedition(ISO3402:1991),whichhasbeeneditoriallyrevised. BS 5743:2000iv Introduction During1988and1989,collaborativestudiesbytaskforcescomposedofmembersoftheCooperationCentrefo
14、r ScientificResearchRelativetoTobacco(CORESTA),“Smoke“and“Technology“groups,havebeenmadeonthe repeatabilityandreproducibilityoftestsontobaccoandtobaccoproducts. ThesestudieshaveresultedinthepublicationofCORESTARecommendedMethodNo.21(seebibliographic reference1). Ithassincebeenfoundthat,inpractice,th
15、eprevioustolerancesonrelativehumidityforthetestatmospherewere difficulttoachieve. BS 5743:2000INTERNATIONALSTANDADR ISO2043:(9991)E1 TobaccoandtobaccoproductsAtmosphereforconditioning andtesting 1 Scope ThisInternationalStandardspecifiestheatmospherefortheconditioningandtestingofsamplesandtestpieces
16、of tobaccoandtobaccoproducts. Itisapplicabletotestsontobacco,tobaccoproducts,andmaterialsusedinthemanufactureoftobaccoproducts forwhichpriorconditioningisnecessary.Itisnotapplicableinthecaseoftestmethodsandtestconditions stipulatedinotherInternationalStandards(seebibliography). NOTE Atmospheresforco
17、nditioningandtestingforothertobaccoproducts(e.g.cigars,pipetobaccoorsnufftobacco)may differfromthosespecifiedinthisInternationalStandard.Ifrequiredseparatestandardswillbedrafted. 2 Termsanddefinitions ForthepurposesofthisInternationalStandard,thefollowingtermsanddefinitionsgiveninISO558:19804apply.
18、2.1 atmosphere ambientconditionsdefinedbyoneormoreofthefollowingparameters: temperature relativehumidity pressure ISO558:1980,definition2.1 2.2 conditioningatmosphere atmosphereinwhichasampleortestpieceiskeptbeforebeingsubjectedtotest NOTE1 Itischaracterizedbyspecifiedvaluesforoneormoreofthefollowin
19、gparameters:temperature,relativehumidity andpressure,whicharekeptwithintheprescribedtolerancesforagivenperiodoftime. NOTE2 Theterm“conditioning“referstotheoperationasawholedesignedtobringasampleortestpiece,beforetesting, intoaspecifiedconditioninrelationtotemperatureandhumidity,bykeepingitforagivenp
20、eriodoftimeintheconditioning atmosphere. NOTE3 Theconditioningcanbedoneeitherinthelaboratoryorinaspecialenclosuretermed“theconditioningchamber“, orinthetestchamber. NOTE4 Thechosenvaluesandperiodoftimedependonthenatureofthesampleortestpiecetobetested. NOTE5 AdaptedfromISO558:1980,definition2.2. 2.3
21、testatmosphere atmospheretowhichasampleortestpieceisexposedthroughoutthetest BS 5743:20002 NOTE1 Itischaracterizedbyspecifiedvaluesforoneormoreofthefollowingparameters:temperature,relativehumidity andpressure,whicharekeptwithintheprescribedtolerances. NOTE2 Thetestmaybecarriedouteitherinthelaborator
22、yorinaspecialchambertermed“thetestchamber“,orinthe conditioningchamber,thechoicedependingonthenatureofthetestpieceandonthetestitself.Forexample,closecontrolof thetestatmospheremaynotbenecessaryifthechangeofpropertiesofthetestpieceisinsignificantinthetestperiod. NOTE3 AdaptedfromISO558:1980,definitio
23、n2.3. 3 Atmosphere 3.1 Conditioningatmosphere Theconditioningatmosphereshallbeasfollows: temperature (22 1) C; relativehumidity(60 3)%. NOTE Whilstmonitoringequipmentmightindicatetherelativehumidityiswithinthe(60 3)%specification,thistolerance canbecomparablewiththeuncertaintyincalibrationoftheequip
24、ment. Thespecifiedtoleranceslistedabovedefinetheatmosphereimmediatelysurroundingthetestpiece.Therefore,the atmospheresurroundingthetestpieceshallbemaintainedatameantemperatureof22 Candameanrelative humidityof60%. 3.2 Testatmosphere Thetestatmosphereshallbethesameastheconditioningatmospherebutwiderto
25、lerancesarepermissibleas follows: temperature (22 2) C; relativehumidity(60 5)%. Theatmosphericpressureshallbemeasuredandincludedinthetestreportifitisoutsidetherange86kPato 106kPa. 4 Conditioning 4.1 Durationofconditioning Incurrentpractice,conditioningfor48husingaforcedairflowisgenerallyfoundtobesu
26、fficientforloose cigarettes.Thisconditioningtimecanbeinsufficientforcertainsamplesortestpieces,forexample,forpacketed cigarettesinbulkandwhenloosecigarettesareconditionedwithoutforcedairflow.Therefore,inallcases,it shouldbeverifiedthatequilibriumhasbeenproperlyattained(see4.2). Itisrecommendedthatth
27、eatmosphericrelativehumiditynearthesamplesortestpiecesbeverifiedbytheuseofa hygrometercalibratedwithtraceablestandards(fordetailsseeISO4677-15). Theairflowshouldbesufficienttoconditionloosecigarettesinthespecifiedperiod,butitshouldbenotedthat excessiveairflowmayresultinimproperconditioning. If,foran
28、yreason,testsamplesaretobekeptforlongerthan10daysbeforeconditioning,storethemintheoriginal packagingorinairtightcontainersjustlargeenoughtocontainthesample.Ifsamplesaretobekeptforlongerthan 3months,itisrecommendedthattheyarefrozenandstoredat,orbelow,16 Cuntilneeded. BS 5743:2000 3 4.2 Checkingofequi
29、librium Equilibriumshallbeconsideredtobeattainedwheneither a) therelativevariationofthemassofthesampleortestpiecesisnotgreaterthan0,2%in3h,or b) thesampleorthetestpieces,placedinaclosedcontainerofavolumesimilartothatofthesampleorthetest pieces,give(s)risetoarelativehumidityinthecontainerequaltothato
30、ftheconditioningatmosphere. NOTE SuitableapparatusforthemeasurementofrelativehumidityinthecontainerisavailablefromRotronicand Novasina. 1) 1)ThisinformationisgivenfortheconvenienceofusersofthisInternationalStandardanddoesnotconstituteanendorsement byISOofthisproduct.Equivalentproductsmaybeusedifthey
31、canbeshowntoleadtothesameresults. BS 5743:20004 Bibliography 1 CORESTARecommendedMethodNo.21:August1991, Atmosphere for conditioning and testing tobacco and tobacco products. 2 ISO15592-2, Fine-cut tobacco and smoking articles made from it Methods of sampling, conditioning and analysis Part 2: Atmos
32、phere for conditioning and testing (under preparation). 3 ISO187, Paper, board and pulps Standard atmosphere for conditioning and testing and procedure for monitoring the test atmosphere and conditioning of samples. 4 ISO558:1980, Conditioning and testing Standard atmospheres Definitions. 5 ISO4677-
33、1, Atmospheres for conditioning and testing Determination of relative humidity Part 1: Aspirated psychrometer method. 6 CORESTARecommendedMethodNo.46:May1998, Atmosphere for conditioning and testing cigars of all sizes and shapes. BS 5743:2000BS 5743:2000 ISO 3402:1999 BSI 389 Chiswick High Road Lon
34、don W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution B
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