SIST EN 14111:2003

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.ãWHYLODErzeugnisse aus pflanzlichen und tierischen Fetten und Ölen - Fettsäure-Methylester (FAME) - Bestimmung der IodzahlProduits dérivés des corps gras - Esters méthyliques d'acides gras (EMAG) - Détermination de l'indice d'iodeFat and oil derivatives - Fatty Acid Methyl Esters (FAME) - Determination of iodine value67.200.10Animal and vegetable fats and oilsICS:Ta slovenski standard je istoveten z:EN 14111:2003SIST EN 14111:2003en01-november-2003SIST EN 14111:2003SLOVENSKI
STANDARD



SIST EN 14111:2003



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14111April 2003ICS 67.200.10English versionFat and oil derivatives - Fatty Acid Methyl Esters (FAME) -Determination of iodine valueProduits dérivés des corps gras - Esters méthyliquesd'acides gras (EMAG) - Détermination de l'indice d'iodeErzeugnisse aus pflanzlichen und tierischen Fetten undÖlen - Fettsäure-Methylester (FAME) - Bestimmung derlodzahlThis European Standard was approved by CEN on 2 January 2003.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14111:2003 ESIST EN 14111:2003



EN 14111:2003 (E)2ForewordThis document (EN 14111:2003) has been prepared by Technical Committee CEN/TC 307, "Oilseeds, vegetableand animal fats and oils and their by-products - Methods of sampling and analysis", the secretariat of which is heldby AFNOR.This European Standard
shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by October 2003, and conflicting national standards shall be withdrawn at the latestby October 2003.This document has been prepared under Mandate M/245 on Fatty Acid Methylester (FAME) given to CEN by theEuropean Commission and the European Free Trade Association.Annex A is informative.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain, Sweden, Switzerland and the United Kingdom.SIST EN 14111:2003



EN 14111:2003 (E)3IntroductionThis European Standard is based on the EN ISO 3961 [1] which was specifically adapted for the determination ofiodine value of fatty acid methyl esters (FAME).SIST EN 14111:2003



EN 14111:2003 (E)41 ScopeThis European Standard specifies a titrimetric method for the determination of iodine value in Fatty Acid MethylEsters, hereinafter referred as FAME.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN ISO 661:1995, Animal and vegetable fats and oils — Preparation of test sample (ISO 661:1989).EN ISO 3696, Water for analytical laboratory use — Specification and test methods (ISO 3696:1987).3 Terms and definitionsFor the purposes of this European Standard, the following term and definition apply.3.1iodine valuemass of halogen, expressed as iodine, absorbed by the test portion when determined in accordance with theprocedure specified in this European Standard, divided by the mass of the test portionIodine value is reported as grams of iodine per 100 g of FAME.4 PrincipleA test portion is dissolved in a mixed solvent and then Wijs reagent is added. After a specified time, potassiumiodide and water are added to the sample and the liberated iodine is titrated using a sodium thiosulfatestandardized solution.5 ReagentsUse only reagents of recognised analytical grade and water of grade 3 in accordance with EN ISO 3696.5.1Potassium iodide (KI), 100 g/l aqueous solution free from iodate and iodine.5.2Starch solutionMix 5 g of soluble starch in 30 ml of water and add to 1 000 ml of boiling water. Boil for 3 min and let stand to cool.5.3Sodium thiosulfate, standard volumetric solution in water, c(Na2S2O3 · 5H2O) = 0,1 mol/l standardized notmore than seven days before use.5.4Solvent, prepared by mixing equal volumes of cyclohexane and glacial acetic acid
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