EN ISO 1736:2000
(Main)Dried milk and dried milk products - Determination of fat content - Gravimetric method (Reference method) (ISO 1736:2000)
Dried milk and dried milk products - Determination of fat content - Gravimetric method (Reference method) (ISO 1736:2000)
Migrated from Progress Sheet (TC Comment) (2000-07-10): /hall be // at formal vote level (glg/98-02-06)
Milchpulver und Trockenmilcherzeugnisse - Bestimmung des Fettgehaltes - Gravimetrisches Verfahren (Referenzverfahren) (ISO 1736:2000)
Diese Internationale Norm legt das Referenzverfahren für die Bestimmung des Fettgehaltes von Milchpulver und Trockenmilcherzeugnissen fest. Das Verfahren gilt für Milchpulver mit einem Fettgehalt von mindestens 40% (Massenanteil), Vollmilchpulver, teilentrahmtes Milchpulver und Magermilchpulver, Molkenpulver und Butterserumpulver.
Lait sec et produits à base de lait sec - Détermination de la teneur en matière grasse - Méthode gravimétrique (Méthode de référence) (ISO 1736:2000)
Mleko v prahu in suhi mlečni proizvodi - Določevanje maščob - Gravimetrijska metoda (Referenčna metoda) (ISO 1736:2000)
General Information
- Status
- Withdrawn
- Publication Date
- 29-Feb-2000
- Withdrawal Date
- 14-Oct-2008
- Technical Committee
- CEN/TC 302 - Milk and milk products - Methods of sampling and analysis
- Drafting Committee
- CEN/TC 302 - Milk and milk products - Methods of sampling and analysis
- Current Stage
- 9960 - Withdrawal effective - Withdrawal
- Start Date
- 15-Oct-2008
- Completion Date
- 15-Oct-2008
Relations
- Effective Date
- 22-Dec-2008
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Frequently Asked Questions
EN ISO 1736:2000 is a standard published by the European Committee for Standardization (CEN). Its full title is "Dried milk and dried milk products - Determination of fat content - Gravimetric method (Reference method) (ISO 1736:2000)". This standard covers: Migrated from Progress Sheet (TC Comment) (2000-07-10): /hall be // at formal vote level (glg/98-02-06)
Migrated from Progress Sheet (TC Comment) (2000-07-10): /hall be // at formal vote level (glg/98-02-06)
EN ISO 1736:2000 is classified under the following ICS (International Classification for Standards) categories: 67.100.01 - Milk and milk products in general. The ICS classification helps identify the subject area and facilitates finding related standards.
EN ISO 1736:2000 has the following relationships with other standards: It is inter standard links to EN ISO 1736:2008. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN ISO 1736:2000 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.YLPHWULMVNDMilchpulver und Trockenmilcherzeugnisse - Bestimmung des Fettgehaltes - Gravimetrisches Verfahren (Referenzverfahren) (ISO 1736:2000)Lait sec et produits a base de lait sec - Détermination de la teneur en matiere grasse - Méthode gravimétrique (Méthode de référence) (ISO 1736:2000)Dried milk and dried milk products - Determination of fat content - Gravimetric method (Reference method) (ISO 1736:2000)67.100.10SURL]YRGLMilk and processed milk productsICS:Ta slovenski standard je istoveten z:EN ISO 1736:2000SIST EN ISO 1736:2001en01-februar-2001SIST EN ISO 1736:2001SLOVENSKI
STANDARD
ReferencenumberISO1736:2000(E)©ISO2000INTERNATIONALSTANDARDISO1736Thirdedition2000-03-01Driedmilkanddriedmilkproducts—Determinationoffatcontent—Gravimetricmethod(Referencemethod)Laitsecetproduitsàbasedelaitsec—Déterminationdelateneurenmatièregrasse—Méthodegravimétrique(Méthodederéférence)SIST EN ISO 1736:2001
ISO1736:2000(E)PDFdisclaimerThisPDFfilemaycontainembeddedtypefaces.InaccordancewithAdobe'slicensingpolicy,thisfilemaybeprintedorviewedbutshallnotbeeditedunlessthetypefaceswhichareembeddedarelicensedtoandinstalledonthecomputerperformingtheediting.Indownloadingthisfile,partiesacceptthereintheresponsibilityofnotinfringingAdobe'slicensingpolicy.TheISOCentralSecretariatacceptsnoliabilityinthisarea.AdobeisatrademarkofAdobeSystemsIncorporated.DetailsofthesoftwareproductsusedtocreatethisPDFfilecanbefoundintheGeneralInforelativetothefile;thePDF-creationparameterswereoptimizedforprinting.EverycarehasbeentakentoensurethatthefileissuitableforusebyISOmemberbodies.Intheunlikelyeventthataproblemrelatingtoitisfound,pleaseinformtheCentralSecretariatattheaddressgivenbelow.©ISO2000Allrightsreserved.Unlessotherwisespecified,nopartofthispublicationmaybereproducedorutilizedinanyformorbyanymeans,electronicormechanical,includingphotocopyingandmicrofilm,withoutpermissioninwritingfromeitherISOattheaddressbeloworISO'smemberbodyinthecountryoftherequester.ISOcopyrightofficeCasepostale56CH-1211Geneva20Tel.+41227490111Fax+41227341079E-mailcopyright@iso.chWebwww.iso.chPrintedinSwitzerlandii©ISO2000–AllrightsreservedSIST EN ISO 1736:2001
ISO1736:2000(E)©ISO2000–AllrightsreservediiiContentsPageForeword.iv1Scope.12Normativereference.13Termanddefinition.14Principle.15Reagents.26Apparatus.27Sampling.38Preparationoftestsample.39Procedure.49.1Testportion.49.2Blanktests.49.3Preparationoffat-collectingvessel.49.4Determination.510Calculationandexpressionofresults.710.1Calculation.710.2Expressionofresults.711Precision.711.1Interlaboratorytest.711.2Repeatability.811.3Reproducibility.812Testreport.8AnnexA(informative)Notesonprocedures.9AnnexB(informative)Alternativeprocedureusingfat-extractiontubeswithsiphonorwash-bottlefittings.11Bibliography.14SIST EN ISO 1736:2001
ISO1736:2000(E)iv©ISO2000–AllrightsreservedForewordISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmental,inliaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/IECDirectives,Part3.DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtothememberbodiesforvoting.PublicationasanInternationalStandardrequiresapprovalbyatleast75%ofthememberbodiescastingavote.AttentionisdrawntothepossibilitythatsomeoftheelementsofthisInternationalStandardmaybethesubjectofpatentrights.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.InternationalStandardISO1736waspreparedbyTechnicalCommitteeISO/TC34,Agriculturalfoodproducts,SubcommitteeSC5,Milkandmilkproducts,incollaborationwiththeInternationalDairyFederation(IDF)andAOACInternational,andwillalsobepublishedbytheseorganizations.Thisthirdeditioncancelsandreplacesthesecondedition(ISO1736:1985),whichhasbeentechnicallyrevised.AnnexesAandBofthisInternationalStandardareforinformationonly.SIST EN ISO 1736:2001
INTERNATIONALSTANDARDISO1736:2000(E)©ISO2000–Allrightsreserved1Driedmilkanddriedmilkproducts—Determinationoffatcontent—Gravimetricmethod(Referencemethod)WARNING—TheuseofthisInternationalStandardmayinvolvehazardousmaterials,operationsandequipment.Thisstandarddoesnotpurporttoaddressallthesafetyproblemsassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishsafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1ScopeThisInternationalStandardspecifiesthereferencemethodforthedeterminationofthefatcontentofdriedmilkanddriedmilkproducts.Themethodisapplicabletodriedmilkwithafatcontentof40%(massfraction)ormore,driedwhole,driedpartiallyskimmed,anddriedskimmedmilk,driedwhey,driedbuttermilkanddriedbutterserum.NOTEWhenthepowdercontainshardlumpswhichdonotdissolveinammoniasolutionorcontainsfreefattyacidsinsignificantquantities,noticeablebyadistinctsmell,theresultofthedeterminationwillbetoolow.WithsuchproductsrecourseshouldbemadetoamethodusingtheWeibull-Berntropprinciple(seeISO8262-3).2NormativereferenceThefollowingnormativedocumentcontainsprovisionswhich,throughreferenceinthistext,constituteprovisionsofthisInternationalStandard.Fordatedreferences,subsequentamendmentsto,orrevisionsof,thispublicationdonotapply.However,partiestoagreementbasedonthisInternationalStandardareencouragedtoinvestigatethepossibilityofapplyingthemostrecenteditionofthenormativedocumentindicatedbelow.Forundatedreferences,thelatesteditionofthenormativedocumentreferredtoapplies.MembersofISOandIECmaintainregistersofcurrentlyvalidInternationalStandards.ISO3889,Milkandmilkproducts—Determinationoffatcontent—Mojonnier-typefatextractionflasks.3TermanddefinitionForthepurposesofthisInternationalStandard,thefollowingtermanddefinitionapplies.3.1fatcontentofdriedmilkanddriedmilkproductsmassfractionofsubstancesdeterminedbytheprocedurespecifiedinthisInternationalStandardNOTEThefatcontentisexpressedasamassfraction,inpercent[formerlygivenas%(m/m)].4PrincipleAnammoniacalethanolicsolutionofatestportionisextractedwithdiethyletherandlightpetroleum.Thesolventsareremovedbydistillationorevaporation.Themassofthesubstancesextractedisdetermined.NOTEThisisusuallyknownastheRöse-Gottliebprinciple.SIST EN ISO 1736:2001
ISO1736:2000(E)2©ISO2000–Allrightsreserved5ReagentsUseonlyreagentsofrecognizedanalyticalgrade,unlessotherwisespecified,anddistilledordemineralizedwaterorwaterofequivalentpurity.Thereagentsshallleavenoappreciableresiduewhenthedeterminationiscarriedoutbythemethodspecified(see9.2.2).5.1Ammoniasolution,containingamassfractionofNH3ofapproximately25%(20=910g/l).NOTEIfammoniasolutionofthisconcentrationisnotavailable,amoreconcentratedsolutionofknownconcentrationmaybeused(see9.4.2).5.2Ethanol(C2H5OH),orethanoldenaturedbymethanol,containingavolumefractionofethanolofatleast94%.(SeeA.5.)5.3CongoredsolutionDissolve1gofCongoredinwaterina100mlone-markvolumetricflask(6.14).Dilutetothemarkwithwater.NOTETheuseofthissolution,whichallowstheinterfacebetweenthesolventandaqueouslayerstobeseenmoreclearly,isoptional(see9.4.4).Otheraqueouscoloursolutionsmaybeusedprovidedthattheydonotaffecttheresultofthedetermination.5.4Diethylether(C2H5OC2H5),freefromperoxides(seeA.3),containingnomorethan2mg/kgofantioxidants,andcomplyingwiththerequirementsfortheblanktest(see9.2.2,A.1andA.4).NOTETheuseofdiethylethercouldleadtohazardoussituations.Duetoexpectedchangesinsafetyregulations,studiesareongoingtoreplacediethyletherbyanotherreagentprovidedthatitdoesnotaffecttheendresultofthedetermination.5.5Lightpetroleum,withanyboilingrangebetween30°Cand60°Cor,asequivalent,pentane(CH3[CH2]3CH3)withaboilingpointof36°Candcomplyingwiththerequirementsfortheblanktest(see9.2.2,A.1andA.4).NOTETheuseofpentaneisrecommendedbecauseofitshigherpurityandconstantquality.5.6MixedsolventShortlybeforeuse,mixequalvolumesofdiethylether(5.4)andlightpetroleum(5.5).6ApparatusWARNING—Sincethedeterminationinvolvestheuseofvolatileflammablesolvents,allelectricalapparatusemployedshallcomplywithlegislationrelatingtothehazardsinusingsuchsolvents.Usuallaboratoryequipmentand,inparticular,thefollowing.6.1Analyticalbalance,capableofweighingtothenearest1mg,withareadabilityof0,1mg.6.2Centrifuge,capableofholdingthefat-extractionflasksortubes(6.6)andcapableofspinningatarotationalfrequencyof500min–1to600min–1toproducearadialaccelerationof80gto90gattheouterendoftheflasksortubes.NOTETheuseofthecentrifugeisoptionalbutrecommended(see9.4.7).6.3Distillationorevaporationapparatus,fordistillingthesolventsandethanolfromtheboilingorconicalflasks,orevaporatingfrombeakersanddishes(see9.4.14)atatemperaturenotexceeding100°C.SIST EN ISO 1736:2001
ISO1736:2000(E)©ISO2000–Allrightsreserved36.4Dryingoven,electricallyheated,withventilationport(s)fullyopen,capableofbeingmaintainedatatemperatureof102°C2°Cthroughoutitsworkingspace.Theovenshallbefittedwithasuitablethermometer.6.5Waterbath,capableofbeingmaintainedatatemperatureof65°C5°C.6.6Mojonnier-typefat-extractionflasks,asspecifiedinISO3889.NOTEItisalsopossibletousefat-extractiontubes,withsiphonorwash-bottlefittings,butthentheprocedureisdifferent.ThealternativeprocedureisgiveninannexB.Thefat-extractionflasksshallbeprovidedwithgoodqualitycorksorstoppersofanothermaterial[e.g.siliconerubberorpolytetrafluoroethylene(PTFE)]unaffectedbythereagentsused.Barkcorksshallbeextractedwiththediethylether(5.4),keptinwateratatemperatureof60°Cormoreforatleast15min,andshallthenbeallowedtocoolinthewatersothattheyaresaturatedwhenused.6.7Rack,forholdingthefat-extractionflasks(ortubes)(6.6).6.8Washbottle,suitableforusewiththemixedsolvent(5.6).Aplasticswashbottleshallnotbeused.6.9Fat-collectingvessels,suchasboilingflasks(flat-bottomed),ofcapacities125mlto250ml,conicalflasks,ofcapacity250ml,ormetaldishes.Ifmetaldishesareused,theyshallbeofstainlesssteel,flat-bottomedwithadiameterof80mmto100mmandaheightofapproximately50mm.6.10Boilingaids,fat-free,ofnon-porousporcelainorsiliconcarbide(optionalwhenmetaldishesareused).6.11Measuringcylinders,ofcapacities5mland25ml.6.12Pipettes,graduated,ofcapacity10ml.6.13Tongs,madeofmetal,forholdingflasks,beakersordishes.6.14Volumetricflask,one-mark,ofcapacity100ml.7SamplingSamplingisnotpartofthemethodspecifiedinthisInternationalStandard.ArecommendedsamplingmethodisgiveninISO707.Itisimportantthatthelaboratoryreceiveasamplewhichistrulyrepresentativeandhasnotbeendamagedorchangedduringtransportorstorage.Storethesamplesatatemperatureofbetween2°Cand6°Cfromthetimeofsampling.8PreparationoftestsampleThoroughlymixthetestsamplebyrepeatedlyrotatingandinvertingthesamplecontainer.Ifnecessary,transferallofthetestsampletoanairtightcontainerofapproximatelytwicethevolumeofthetestsampletoallowthisoperationtobecarriedout.SIST EN ISO 1736:2001
ISO1736:2000(E)4©ISO2000–Allrightsreserved9ProcedureNOTE1Ifitisrequiredtocheckwhethertherepeatabilitylimit(11.2)ismet,carryouttwosingledeterminationsinaccordancewith9.1to9.4.NOTE2Analternativeprocedureusingfat-extractiontubeswithsiphonorwash-bottlefittings(seenotein6.6)isgiveninannexB.9.1TestportionMixthetestsample(clause8)bygentlystirringorrotatingandinvertingthecontainerseveraltimes.Immediatelyweightothenearest1mg,directlyorbydifference,inafat-extractionflask(6.6)oneofthefollowingtestportions:a)about1gofdriedhigh-fatmilk,ofdriedwholemilkorofdriedbutterserum;b)about1,5gofdriedpartiallyskimmedmilk;c)about1,5gofdriedskimmedmilk;d)about1,5gofdriedwhey;e)about1,5gofdriedbuttermilk.Transferthetestportionascompletelyaspossibleintothelower(small)bulbofthefat-extractionflask.9.2Blanktests9.2.1BlanktestformethodCarryoutablanktestsimultaneouslywiththedeterminationusingthesameprocedureandsamereagents,butreplacingthedispersedtestportionin9.4.1by10mlofwater(seeA.2).Ifthevalueobtainedintheblanktestregularlyexceeds1,0mg,checkthereagentsifthishasnotbeenrecentlydone(9.2.2).Correctionsofmorethan2,5mgshouldbementionedinthetestreport.9.2.2BlanktestforreagentsTotestthequalityofthereagents,carryoutablanktestasspecifiedin9.2.1.Additionallyuseanemptyfat-collectingvessel,preparedasspecifiedin9.3,formasscontrolpurposes.Thereagentsshallleavenoresiduegreaterthan1,0mg(seeA.1).Iftheresidueofthecompletereagentblanktestisgreaterthan1,0mg,determinetheresidueofthesolventsseparatelybydistilling100mlofthediethylether(5.4)andlightpetroleum(5.5),respectively.Useanemptyfat-collectingvessel,preparedforcontrolpurposesasdescribedabove,toobtaintherealmassofresiduewhichshallnotexceed1,0mg.Veryoccasionally,thesolventsmaycontainvolatilematterwhichisstronglyretainedinfat.Ifthereareindicationsofthepresenceofsuchsubstances,carryoutblanktestsonallthereagentsandforeachsolventusingafat-collectingvesselwithabout1gofanhydrousbutterfat.Ifnecessary,redistilsolventsinthepresenceof1gofanhydrousbutterfatper100mlofsolvent.Usethesolventsonlyshortlyaftertheredistillation.Replaceunsatisfactoryreagentsandsolvents,orredistilsolvents.9.3Preparationoffat-collectingvesselDryafat-collectingvessel(6.9)withafewboilingaids(6.10)intheoven(6.4)setat102°Cfor1h.NOTE1Boilingaidsaredesirabletopromotegentleboilingduringthesubsequentremovalofsolvents,especiallywhenusingglassfat-collectingvessels;theiruseisoptionalwithmetaldishes.SIST EN ISO 1736:2001
ISO1736:2000(E)©ISO2000–Allrightsreserved5Protectthefat-collectingvesselfromdustandallowittocooltothetemperatureoftheweighingroom(glassfat-collectingvesselforatleast1h;metaldishforatleast30min).NOTE2Toavoidinsufficientcoolingorundulylongcoolingtimes,thefat-collectingvesselshouldnotbeplacedinadesiccator.Usetongs(6.13)toplacethefat-collectingvesselonthebalance.Weighthefat-collectingvesseltothenearest1,0mg.NOTE3Tongsshouldpreferablybeusedtoavoid,inparticular,temperaturevariations.9.4Determination9.4.1Carryoutthedeterminationwithoutdelay.Addabout10mlofpreheatedwatera
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