SIST EN 14109:2003

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Erzeugnisse aus pflanzlichen und tierischen Fetten und Ölen - Fettsäure-Methylester (FAME) - Bestimmung des Kaliumgehaltes durch AtomabsorptionsspektrometrieProduits dérivés des corps gras - Esters méthyliques d'acides gras (EMAG) - Détermination de la teneur en potassium par spectrométrie d'absorption atomiqueFat and oil derivatives - Fatty Acid Methyl Esters (FAME) - Determination of potassium content by atomic absorption spectrometry67.200.10Animal and vegetable fats and oilsICS:Ta slovenski standard je istoveten z:EN 14109:2003SIST EN 14109:2003en01-november-2003SIST EN 14109:2003SLOVENSKI
STANDARD



SIST EN 14109:2003



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14109April 2003ICS 67.200.10English versionFat and oil derivatives - Fatty Acid Methyl Esters (FAME) -Determination of potassium content by atomic absorptionspectrometryProduits dérivés des corps gras - Esters méthyliquesd'acides gras (EMAG) - Détermination de la teneur enpotassium par spectrométrie d'absorption atomiqueErzeugnisse aus pflanzlichen und tierischen Fetten undÖlen - Fettsäure-Methylester (FAME) - Bestimmung desKaliumgehaltes durch AtomabsorptionsspektrometrieThis 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 14109:2003 ESIST EN 14109:2003



EN 14109:2003 (E)2ForewordThis document (EN 14109:2003) 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, and supports essential requirements of EUDirective(s).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 14109:2003



EN 14109:2003 (E)31 ScopeThis European Standard specifies a method for the determination of potassium contents equal to or greater than0,5 mg/kg.This method is applicable to fatty acid methyl esters intended for addition to mineral oils.WARNING — The use of this method may involve hazardous equipment, materials and operations. Thismethod does not purport to address to all of the safety problems associated with its use, but it is theresponsibility of the user to search and establish appropriate safety and health practices and determinethe applicability of regulatory limitations prior to use.2 PrincipleThe vegetable oil methyl ester sample is diluted with a xylene solution and a stabilizer.The potassium content in the sample is directly determined by flame atomic absorption spectrometry at thewavelength of 766,5 nm. The calibration solutions used are prepared from a potassium organometallic saltdissolved in a mixture of xylene and stabilizer. The addition of a stabilizer to the calibration solutions is necessaryin order to improve their storage (the low element contents are unstable) and the linearity of the calibration.WARNING — The ester sample shall be diluted at least ten times with xylene so that the comparison of themeasurements of the sample solution and standards is valid.NOTEXylene can be replaced by cyclohexane or light petroleum in those laboratories which are not authorized to usearomatic solvents.3 ReagentsUse only reagents of recognized analytical grade, unless otherwise specified.3.1Recommendations for washing glasswareThe glassware used for the preparation of the solutions shall be washed at least twice with an approximate 5 mol/lsolution of hydrochloric acid, rinsed with distilled water then dried in order to avoid potassium pollution.3.2Xylene, mixture of isomers.WARNING — Inflammable and noxious.3.3Stabilizer, supplied by CONOSTAN1).3.4Stabilizer solution in xylene, 100 g/l.Dilute in a 200 ml polypropylene volumetric flask, 20 g of stabilizer (3.3) with xylene. Store this solution in apolypropylene bottle.3.5Potassium, solution in oil, 5 000 mg/kg.Ready-to-use solution of a potassium organometallic salt in stock oil, having a certified titre 2).
1)Products available commercially from CONOSTAN Standard, supplied by Conostan Division, Continental Oil Co, PoncaCity, OK 74601 – USA.2)Conostan (see above) or SPEX Standard supplied by SPEX Industries, Inc. Chemical Sales Department, 3880 ParkAvenue, Edison, NJ 08820 - USA. This information is given for the convenience of users of this European Standard and doesnot constitute an endorsement by CEN of these products.SIST EN 14109:2003



EN 14109:2003 (E)43.6Potassium, solution of intermediary dilutions for the preparation of the set of calibration solutions.3.6.1Potassium, solution in xylene, 500 mg/l.Weigh, to within 0,001 g, approximately 2,5 g of the potassium solution (3.6) in a 25 ml volumetric flask and diluteto the mark with xylene. This solution can be stored for a month.3.6.2Potassium, solution in xylene, 5 mg/l.Sample, using a pipette, 0,50 ml of the potassium standard solution (3.6.1), transfer into a 50 ml volumetric flaskand dilute to the mark with xylene.Prepare a new solution each day.NOTEThe solutions of intermediary dilut
...