EN 14082:2003

Foodstuffs - Determination of trace elements - Determination of lead, cadmium, zinc, copper, iron and chromium by atomic absorption spectrometry (AAS) after dry ashing

This draft European Standard specifies a method for the determination of lead, cadmium, zinc, copper, iron and cromium in foodstuffs by atomic absorption spectrometry (AAS) after dry ashing at 450°C. The method describes determination in various types of foods. The method has been successfully tested in an interlaboratory trial in which 16 laboratories participated. Food types covered by the method include composite diets, cereals, fish, fruit, liver and milk.

Lebensmittel - Bestimmung von Elementspuren - Bestimmung von Blei, Cadmium, Zink, Kupfer, Eisen und Chrom mit Atomabsorptionsspektrometrie (AAS) nach Trockenveraschung

Produits alimentaires - Dosage des éléments traces - Détermination du plomb, cadmium, zinc, cuivre, fer et chrome par spectrométrie d'absorption atomique (AAS) après calcination à sec

La présente Norme européenne spécifie une méthode de détermination du plomb, du cadmium, du zinc, du cuivre, du fer et du chrome dans les produits alimentaires par spectrométrie d'absorption atomique (AAS) après calcination à sec à 450 °C.
Cette méthode de détermination s'applique à divers types de produits alimentaires. Elle a satisfait à un essai interlaboratoires auquel ont participé 16 laboratoires [1]. Les produits alimentaires concernés par la validation de cette méthode comprennent les repas composés, les céréales, le poisson, les fruits, le foie et le lait.
Les produits alimentaires spécifiques faisant l'objet de Normes européennes sont exclus du domaine d'application de la présente Norme européenne horizontale. Il incombe à l'analyste de contrôler l'existence de normes verticales.

Živila - Določevanje elementov v sledovih - Določevanje svinca, kadmija, cinka, bakra, železa in kroma z atomsko absorpcijsko spektrometrijo (AAS) po suhem sežigu

General Information

• Status: Withdrawn
• Publication Date: 18-Mar-2003
• Withdrawal Date: 19-Nov-2019
• ICS: 67.050 - General methods of tests and analysis for food products
• Technical Committee: CEN/TC 275 - Food analysis - Horizontal methods
• Drafting Committee: CEN/TC 275/WG 10 - Trace elements (heavy metals)
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Completion Date: 20-Nov-2019
• Ref Project: SIST EN 14082:2003 - Foodstuffs - Determination of trace elements - Determination of lead, cadmium, zinc, copper, iron and chromium by atomic absorption spectrometry (AAS) after dry ashing

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.VHåLJXLebensmittel - Bestimmung von Elementspuren - Bestimmung von Blei, Cadmium, Zink, Kupfer, Eisen und Chrom mit Atomabsorptionsspektrometrie (AAS) nach TrockenveraschungProduits alimentaires - Dosage des éléments traces - Détermination du plomb, cadmium, zinc, cuivre, fer et chrome par spectrométrie d'absorption atomique (AAS) apres calcination a secFoodstuffs - Determination of trace elements - Determination of lead, cadmium, zinc, copper, iron and chromium by atomic absorption spectrometry (AAS) after dry ashing67.050Splošne preskusne in analizne metode za živilske proizvodeGeneral methods of tests and analysis for food productsICS:Ta slovenski standard je istoveten z:EN 14082:2003SIST EN 14082:2003en01-junij-2003SIST EN 14082:2003SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14082March 2003ICS 67.050English versionFoodstuffs - Determination of trace elements - Determination oflead, cadmium, zinc, copper, iron and chromium by atomicabsorption spectrometry (AAS) after dry ashingProduits alimentaires - Dosage des éléments traces -Détermination du plomb, cadmium, zinc, cuivre, fer etchrome par spectrométrie d'absorption atomique (AAS)après calcination à secLebensmittel - Bestimmung von Elementspuren -Bestimmung von Blei, Cadmium, Zink, Kupfer, Eisen undChrom mit Atomabsorptionsspektrometrie (AAS) nachTrockenveraschungThis European Standard was approved by CEN on 18 December 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,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 14082:2003 ESIST EN 14082:2003

Results of the interlaboratory test.11Bibliography.17SIST EN 14082:2003

1 400 mg/ml.4.3.1 Nitric acid, c (0,1 mol/l). Dilute 7 ml concentrated nitric acid (4.3) with water to 1 000 ml.4.4 Standard solutionsNOTEThe standard solutions for Pb, Cd, Zn, Cu and Fe can be prepared from metals or metal salts. Standard solutionscan also be commercially available. It is advisable to use certified standard solutions. The following preparation of standardsolutions are given as an example.4.4.1 Lead standard solution. 1 000 mg/l. Dissolve 1000 mg Pb in 7 ml nitric acid (4.3) in 1-l-volumetric flask.Dilute to volume with water.4.4.2 Cadmium standard solution. 1 000 mg/l. Dissolve 1 000 mg Cd in 14 ml water + 7 ml nitric acid (4.3) in1-l-volumetric flask. Dilute to volume with water.4.4.3 Chromium standard solution. 1 000 mg/l. Dissolve 3 735 mg K2CrO4 in 7 ml nitric acid (4.3) in1-l-volumetric flask. Dilute to volume with water.4.4.4 Zinc standard solution. 1 000 mg/l. Dissolve 1 000 mg Zn in 14 ml water + 7 ml nitric acid (4.3) in1-l-volumetric flask. Dilute to volume with water.4.4.5 Copper standard solution. 1 000 mg/l. Dissolve 1 000 mg Cu in 7 ml nitric acid (4.3) in 1-l-volumetricflask. Dilute to volume with water.4.4.6 Iron standard solution. 1 000 mg/l. Dissolve 1 000 mg Fe in 14 ml water + 7 ml nitric acid (4.3) in1-l-volumetric flask. Dilute to volume with water.4.5 Calibration solutions4.5.1 For graphite furnace analysisDilute standard solutions 4.4.1 to 4.4.3 with c (0,1 mol/l) nitric acid (4.3.1) to a range of standards that covers thelinear range of the element to be determined.4.5.2 Working standard solutions for flame analysisDilute standard solutions 4.4.4 to 4.4.6 with c (0,1 mol/l) nitric acid (4.3.1) to a range of standards that covers theconcentration of the element to be determined.SIST EN 14082:2003

Infrared lamp2
Air3
Crystallising dish4
Ceramic plate5
Hot plateFigure 1 — Apparatus for pre-ashing of samplesPlace the crucible with the test portion covered with the glass cover on the ceramic plate, and let purified air comingthrough a glass tube sweep over the sample. Put the IR lamp at a distance of 30 cm to 40 cm from the sample andset the hot plate at about 100 °C. Reduce the distance as the drying proceeds until the sample can be assumed tobe dry. The lamp should then be right down at the cover.Pre-ash the sample by increasing the temperature slowly and stepwise with an IR lamp and a hot plate. The finaltemperature on the ceramic plate should then be about 300 °C. The time required for the pre-ashing varies stronglydepending on the type of sample.Put the crucible in the furnace at 200 °C to 250 °C and slowly raise the temperature to 450 °C at a rate of not morethan 50 °C/h. Let the sample stand overnight.SIST EN 14082:2003
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