SIST EN 13805:2002
(Main)Foodstuffs - Determination of trace elements - Pressure digestion
Foodstuffs - Determination of trace elements - Pressure digestion
This European Standard specifies a method for the digestion of foodstuffs under pressure intended for use in the determination of trace elements. This method has been collaboratively tested in combination with atomic absorption (flame, furnace, hydride, cold-vapour) techniques, ICP-MS. ICP-OES and voltametry can be used in combination with the measurement standards, which make reference to this one.
Lebensmittel - Bestimmung von Elementspuren - Druckaufschluss
Diese Europäische Norm legt ein Druckaufschlussverfahren für Lebensmittel zur Bestimmung von Elementspuren fest. Dieses Verfahren wurde im Ringversuch in Verbindung mit der Atomabsorptionstechnik (Flamme, Ofen, Hydrid, Kaltdampf) und ICP-MS geprüft. ICP-OES und Voltammetrie können in Kombination mit den Prüfnormen angewendet werden, die einen Verweis auf diese Norm enthalten.
Produits alimentaires - Détermination des éléments-traces - Digestion sous forte pression
Le présent projet d'EN spécifie une méthode de digestion des produits alimentaires sous haute pression afin de déterminer les éléments trace. Cette méthode a été testée par plusieurs laboratoires en combinaison avec d'autres techniques: spectrométrie d'absorption atomique (en flamme, a four graphite, par génération d'hydrures, par génération de vapeurs froides).
Živila - Določevanje elementov v sledovih - Razklop pod tlakom
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Lebensmittel - Bestimmung von Elementspuren - DruckaufschlussProduits alimentaires - Détermination des éléments-traces - Digestion sous forte pressionFoodstuffs - Determination of trace elements - Pressure digestion67.050Splošne preskusne in analizne metode za živilske proizvodeGeneral methods of tests and analysis for food productsICS:Ta slovenski standard je istoveten z:EN 13805:2002SIST EN 13805:2002en01-september-2002SIST EN 13805:2002SLOVENSKI
STANDARD
SIST EN 13805:2002
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13805March 2002ICS 67.050English versionFoodstuffs - Determination of trace elements - PressuredigestionProduits alimentaires - Détermination des éléments-traces- Digestion sous forte pressionLebensmittel - Bestimmung von Elementspuren -DruckaufschlussThis European Standard was approved by CEN on 22 February 2002.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,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13805:2002 ESIST EN 13805:2002
EN 13805:2002 (E)2ContentspageForeword.31Scope.32Normative references.33Principle.34Reagents.35Apparatus and equipment.46Sampling.47Procedure.4Annex A (normative)
Figures of the apparatus.7Bibliography.9SIST EN 13805:2002
EN 13805:2002 (E)3ForewordThis document (EN 13805:2002) has been prepared by Technical Committee CEN/TC 275 "Food analysis – Hori-zontal methods", the secretariat of which is held by DIN.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 September 2002, and conflicting national standards shall be withdrawn at the lat-est by September 2002.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following coun-tries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Swe-den, Switzerland and the United Kingdom.Annex A is normative.1 ScopeThis European Standard specifies a method for the digestion of foodstuffs under pressure intended for use in thedetermination of trace elements. This method has been collaboratively tested in combination with atomic absorption(flame, furnace, hydride, cold-vapour) techniques, ICP-MS. ICP-OES and voltametry can be used in combinationwith the measurement standards, which make reference to this one.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 13804, Foodstuffs — Determination of trace elements — Performance criteria, general considerations andsample preparation.3 PrinciplePressure digestion, physicochemical method described in this document for mineralising the sample material andfor preparing a test solution containing the trace elements prior to their determination according to the standardsthat make reference to this one and have been validated in combination with it.Apparatus with a low level of contamination is used to homogenise the sample, which is then digested in a sealedvessel in a pressure container at high temperature and pressure by conventional or microwave assisted heating [1],[2], [3].4 Reagents4.1 GeneralThe concentration of the trace elements in the chemicals and water used shall be low enough not to affect the re-sults of the determination.SIST EN 13805:2002
EN 13805:2002 (E)44.2 Nitric acid, not less than 65 %, (mass fraction), having a density of approximately
(HNO3) = 1,4 g/ml.In case of insufficient purity it is necessary to purify the acid in a distillation apparatus (5.5).4.3 Diluted nitric acid, to be prepared by mixing nitric acid (4.2) and water in a proportion minimum of 1 + 9parts by volume.4.4 Hydrochloric acid, not less than 30 %, (mass fraction), having a density of approximately (HCl) = 1,15 g/ml.4.5 Hydrogen peroxide, not less than 30 %, (mass fraction).5 Apparatus and equipment5.1 GeneralTo minimise the contamination, carefully clean all the apparatus which comes into direct contact with the sample bytreatment with diluted nitric acid (4.3) and then with water. It is advisable to use a stripping apparatus (5.6) forcleaning vessels or flasks.5.2 Pressure digestion apparatus, commercially obtainable, tested safety pressure vessels made of acid-resistant materials and having holders for the sample of acid-resistant material with low level of contamination.Apparatus is available which uses a high-pressure incinerator with or without ambient autoclave pressure.Instead of polytetrafluoroethylene (PTFE) holders, it is better to use
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