BS EN ISO 665-2000 Oilseeds - Determination of moisture and volatile matter content《油料种子 水和挥发物含量的测定》.pdf

1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN ISO 665:2000 BS 428

2、9-3:2000 The European Standard EN ISO 665:2000 has the status of a British Standard ICS 67.200.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Oilseeds Determination of moisture and volatile matter contentThis British Standard, having been prepared under the direction of th

3、e Consumer Products and Services Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 November 2000 BSI 11-2000 ISBN 0 580 36617 0 BS EN ISO 665:2000 Amendments issued since publication Amd. No. Date Comments National foreword This British Standa

4、rd is the official English language version of EN ISO 665:2000. It is identical with ISO 665:2000. It supersedes BS 4289-3:1995 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee AW/2, Oilseeds and residues, which has the responsibility to: aid enquirers

5、 to understand the text; present to the responsible international/European committee any enquiries 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 repres

6、ented on this committee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding European publications. The British Sta

7、ndards which implement these international or European publications 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 Standard does not purport to

8、 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 cover, an inside front cover,

9、the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii and iii, a blank page, pages 1 to 8, the annex ZA page and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.EUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO6

10、65 September2000 ICS67.200.20 SupersedesENISO665:2000 Englishversion OilseedsDeterminationofmoistureandvolatilemattercontent (ISO665:2000) GrainesolagineusesDterminationdelateneureneau etenmatiresvolatiles(ISO665:2000) lsamenBestimmungdesFeuchtegehaltesundder flchtigenBestandteile(ISO665:2000) ThisE

11、uropeanStandardwasapprovedbyCENon15September2000. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeo

12、btainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions

13、. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRN

14、ORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2000CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO665:2000EForeword ThetextoftheI nternationalSta ndard ISO 665:2000has beenpr epared by Technical CommitteeISO/ TC34“Ag ricultural foodpr odu

15、cts“ incollabor ation with TechnicalCo mmittee CEN/TC307“Oilse eds,veg etable and animal fatsand oils and their byp roductsM ethodsof samplinga nd analysis“,t hesecretariatof whichis held by AFNOR. ThisEurop ean Standardsuperse desENISO 665:1995. ThisEurop ean Standardshall be given thes tatusofa na

16、tionalst andard, either by publication ofani dentical textor by endorsement,att helatest by March 2001,a ndcon flictingn ational standardss hallbe withdrawnatthel atest by March20 01. According totheCE N/CENELECInter nalRe gulations, the national standardsorga nizations of the followingc ountriesare

17、 bound toi mplementt hisEur opean Standard:Aust ria, Belgium, Czech Republic, Denmark,Finla nd,Franc e,Ger many,Greece,I celand, Ireland,Ita ly, Luxembourg,Ne therlands, Norway, Portugal,Sp ain, Sweden,Swi tzerlanda ndt heU nited Kingdom. Endorsementnotice ThetextoftheI nternationalSta ndard ISO 665

18、:2000was approved by CENasaEurop ean Standard withouta ny modification. NOTE:Nor mativere ferencesto International Standards arelistedina nnexZA (normative). ENISO665:2000Referencenumber ISO665:2000(E) INTERNATIONAL STANDARD ISO 665 Secondedition 2000-09-15 OilseedsDeterminationofmoistureand volatil

19、emattercontent GrainesolagineusesDterminationdelateneureneauetenmatires volatiles ENISO665:2000 ii ENISO665:2000 iii Foreword ISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISO memberbodies).TheworkofpreparingInternationalStandardsisnormallycarried

20、outthroughISOtechnical committees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas therighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmental,in liaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalEle

21、ctrotechnical Commission(IEC)onallmattersofelectrotechnicalstandardization. InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/IECDirectives,Part3. DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtothememberbodiesforvoting. PublicationasanInternationalStanda

22、rdrequiresapprovalbyatleast75%ofthememberbodiescastingavote. AttentionisdrawntothepossibilitythatsomeoftheelementsofthisInternationalStandardmaybethesubjectof patentrights.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights. InternationalStandardISO665waspreparedbyTechnicalCommitteeIS

23、O/TC34,Foodproducts,Subcommittee SC2,Oleaginousseedsandfruits. Thissecondeditioncancelsandreplacesthefirstedition(ISO665:1997),whichhasbeentechnicallyrevised. AnnexAofthisInternationalStandardisforinformationonly. ENISO665:2000 ENISO665:2000 1 OilseedsDeterminationofmoistureandvolatilemattercontent

24、1 Scope ThisInternationalStandardspecifiesamethodforthedeterminationofthemoistureandvolatilemattercontentof oilseeds. 2 Normativereference Thefollowingnormativedocumentcontainsprovisionswhich,throughreferenceinthistext,constituteprovisionsof thisInternationalStandard.Fordatedreferences,subsequentame

25、ndmentsto,orrevisionsofthispublicationdo notapply.However,partiestoagreementsbasedonthisInternationalStandardareencouragedtoinvestigatethe possibilityofapplyingthemostrecenteditionofthenormativedocumentindicatedbelow.Forundatedreferences, thelatesteditionofthenormativedocumentreferredtoapplies.Membe

26、rsofISOandIECmaintainregistersof currentlyvalidInternationalStandards. ISO664:1990,OilseedsReductionoflaboratorysampletotestsample. 3 Termanddefinition ForthepurposesofthisInternationalStandard,thefollowingtermanddefinitionapplies. 3.1 moistureandvolatilemattercontent lossinmassmeasuredundertheopera

27、tingconditionsspecifiedinthisInternationalStandard NOTE Itisexpressedasamassfraction,inpercentformerlygivenas%(m/m)ofthemassoftheinitialsample. 4Principle Themoistureandvolatilemattercontentofatestportionisdetermined,eitheronthematerialasreceived(pure seedandimpurities)or,ifrequired,onthepureseedalo

28、ne,bydryingat103C 2Cinanovenatatmospheric pressure,untilpracticallyconstantmassisreached. 5 Apparatus Usuallaboratoryapparatusand,inparticular,thefollowing. 5.1 Analyticalbalance,capableofweighingtothenearest0,001g. 5.2 Mechanicalmill,easytoclean,suitableforthekindofseedandallowingthelattertobegroun

29、dwithout heatingandwithoutappreciablechangeinmoisture,volatilematterandoilcontent. 5.3 Mechanicalgrateror,ifnotavailable,ahand-operatedgrater. ENISO665:2000 2 5.4 Flat-bottomedvessel,eitherofmetalorglass,atthediscretionoftheanalyst. Ifmetalisused,itshallberesistanttoattackunderthetestconditions.Thev

30、esselshallbeprovidedwithawell- fittinglidandshallallowthetestportiontobespreadtoabout0,2g/cm 2 (e.g.avesselofdiameter70mmand height30mmto40mm).Glassvesselswithgroundclosuresmayalsobeused. 5.5 Electricoven,withthermostaticcontrolandgoodnaturalventilation,capableofbeingregulatedsothatthe temperatureof

31、theairandoftheshelvesintheneighbourhoodofthetestportionsliesbetween101Cand105C innormaloperation. 5.6 Desiccator,containinganefficientdesiccantsuchasphosphorus(V)oxide,silicagel,activatedalumina, etc.,andprovidedwithaceramicplatewhichallowsvessels(5.4)tocoolrapidly. 6 Sampling Samplingisnotpartofthe

32、methodspecifiedinthisInternationalStandard.Arecommendedsamplingmethodis giveninISO542 1 . Itisimportantthatthelaboratoryreceiveasamplewhichistrulyrepresentativeandhasnotbeendamagedor changedduringtransportandstorage. 7 Preparationoftestsample 7.1 Preparethetestsamplebyreducingthelaboratorysampleinac

33、cordancewithISO664.Iflargenon- oleaginousforeignbodieshavebeenseparatedbeforereductionofthelaboratorysample,makeallowanceforthis inthecalculation(see9.2).Accordingtotherequirementsofthecontract,takeasampleasreceivedorafter separationoftheimpurities. 7.2 Inthecaseofcopra,gratetheproductbyhandor,prefe

34、rably,useamechanicalgrater(5.3)whichallowsthe wholesampletobetreated.Whengratingbyhand,whichdoesnotallowalltheanalysissampletobegrated, endeavourtoobtainatestsamplewhichisasrepresentativeaspossibleand,tothisend,takeaccountofthesize andcolourofdifferentfragments. Thelengthoftheparticlesaftergratingma

35、yexceed2mm,butshallnotbegreaterthan5mm.Mixtheparticles carefullyandcarryoutthedeterminationwithoutdelay. 7.3 Inthecaseofseedsofmediumsize(groundnut,etc.),exceptforsafflowerseed,sunflowerseed,soyabeans andcottonseedwithadherentlinters,grindthetestsampleinthemechanicalmill(5.2),whichhaspreviouslybeen

36、wellcleaned,untilthemajordimensionoftheparticlesobtainedisnotgreaterthan2mm.Rejectthefirstparticles (aboutone-twentiethofthesample).Collecttherest,mixcarefullyandcarryoutthedeterminationwithoutdelay. 7.4 Smallseeds(linseed,colza,hemp,etc.)aswellassafflowerseed,sunflowerseed,soyabeansand cottonseedwi

37、thadherentlinters,areanalysedwithoutpreviousgrinding. 8 Procedure 8.1 Testportion 8.1.1 Drythevesselwithitslidfor1hat103Cpriortobeingplacedinthedesiccatorbeforeweighing.Weigh thevessel(see5.4)withitslidtothenearest0,001g,afterleavingitopenforatleast30mininthedesiccator(see 5.6)atlaboratorytemperatur

38、e. ENISO665:2000 3 8.1.2 Thenweighintothevessel,tothenearest0,001g, either5g 0,5gofthegratedproduct(see7.2)inthecaseofcopra,ormeal(see7.3),ormedium-sized seedsotherthansafflowerseed,sunflowerseed,soyabeansorcottonseedwithadherentlinters, or5gto10gofwholeseedinthecaseofsafflowerseed,sunflowerseed,soy

39、abeans,cottonseedwith adherentlintersandsmallseeds. Spreadthematerialevenlyoverthewholebaseofthevesselandclosethevesselwithitslid.Weighthewholeto thenearest0,001g. 8.1.3 Carryouttheseoperationsasquicklyaspossible,toavoidanyappreciablechangeinmoisturecontent. 8.2 Determination Placethevesselcontainin

40、gthetestportion,withthelidremoved,intheoven(see5.5)setat103C 2C.Close theoven.After3h(12hto16hinthecaseofcottonseedwithadherentlinters),reckonedfromthetimewhenthe temperaturereturnsto103C,opentheoven.Immediatelyclosethevesselwithitslidandplaceitinthe desiccator.Assoonasthevesselhascooledtolaboratory

41、temperature,weighittothenearest0,001g. Returnthevessel,withthelidremoved,totheoven.After1h,repeattheoperationsofclosingthevessel,allowing ittocool,andweighingit. Ifthedifferencebetweenthetwoweighingsisequaltoorlessthan0,005g(fora5gtestportion),regardthe determinationasfinished.Ifnot,subjectthetestpo

42、rtiontosuccessive1hperiodsintheoven,untilthedifference betweentwosuccessiveweighingsisequaltoorlessthan0,005g. Neverputmoistproductsintheoventogetherwithproductsthatarenearlydry,asthiswillresultinthelatterbeing partiallyrehydrated. Carryouttwodeterminationsonthesametestsample. 9 Expressionofresults

43、9.1 Themoistureandvolatilemattercontent,w,asapercentagebymassofthesampleasreceived,isequalto: 12 10 100% mm w mm where m 0 isthemass,ingrams,ofthevessel; m 1 isthemass,ingrams,ofthevesselandtestportionbeforedrying; m 2 isthemass,ingrams,ofthevesselandtestportionafterdrying. Takeastheresultthearithme

44、ticmeanoftheresultsofthetwodeterminations(8.2)ifthedifferencebetweenthe resultsissmallerthan0,2%(massfraction).Otherwise,repeatthedeterminationontwoothertestportions.Ifthis timethedifferenceagainexceeds0,2gper100gofsample,takeastheresultthearithmeticmeanofthefour determinationscarriedout,providedtha

45、tthemaximumdifferencebetweentheindividualresultsdoesnotexceed 0,5gper100gofsample. Reportresulttoonedecimalplace. ENISO665:2000 4 9.2 If,beforetheanalysis,largenon-oleaginousforeignbodieshavebeenseparatedfromthesample(see7.1), multiplytheresultobtainedinaccordancewith9.1by: 100% 100% X whereXisthepe

46、rcentagebymassoflargeimpurities,previouslyseparated,intheinitialmaterialasreceived. 9.3 Ifthedeterminationofmoistureandvolatilematterhasbeencarriedoutonpureseed,calculatethemoisture andvolatilemattercontentbymeansoftheformulagivenin9.1. 10Precision 10.1Interlaboratorytests Detailsofinterlaboratoryte

47、stsontheprecisionofthemethodaregiveninannexA.Thevaluesderivedfromthese interlaboratorytestsmaynotbeapplicabletoconcentrationrangesandmatricesotherthanthosegiven. 10.2Repeatability Theabsolutedifferencebetweentwoindependentsingletestresults,obtainedusingthesamemethodonidentical testmaterialinthesamel

48、aboratorybythesameoperatorusingthesameequipmentwithinashortintervaloftime, willinnotmorethan5%ofcasesbegreaterthanthefollowing(absolutevalues): forrapeseed 0,2%; forsoyabeans 0,4%; forsunflowerseeds 0,2%. 10.3Reproducibility Theabsolutedifferencebetweentwosingletestresults,obtainedusingthesamemethodonidenticaltestmaterial indifferentlaboratoriesbydifferentoperatorsusingdifferentequipment,willinnotmorethan5%ofcasesbe greaterthanthefoll