EN 15765:2009

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Lebensmittel - Bestimmung von Elementspuren - Bestimmung von Zinn mit Massenspektrometrie mit induktivgekoppeltem Plasma (ICP-MS) nach DruckaufschlussProduits alimentaires - Dosage de l'étain par spectrométrie de masse à plasma induit par haute fréquence (ICP-MS) après digestion sous pressionFoodstuffs - Determination of trace elements - Determination of tin by inductively coupled plasma mass spectrometry (ICP-MS) after 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 15765:2009SIST EN 15765:2010en,fr,de01-februar-2010SIST EN 15765:2010SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 15765
December 2009 ICS 67.050 English Version
Foodstuffs - Determination of trace elements - Determination of tin by inductively coupled plasma mass spectrometry (ICP-MS) after pressure digestion
Produits alimentaires - Dosage des éléments traces - Dosage de l'étain par spectrométrie de masse à plasma induit par haute fréquence (ICP-MS) après digestion sous pression
Lebensmittel - Bestimmung von Elementspuren - Bestimmung von Zinn mit Massenspektrometrie mit induktiv gekoppeltem Plasma (ICP-MS) nach Druckaufschluss This European Standard was approved by CEN on 7 November 2009.
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Results of the inter-laboratory test .9Bibliography . 11 SIST EN 15765:2010

1 Scope This European Standard specifies a method for the determination of tin in foodstuffs by inductively coupled plasma mass spectrometry (ICP-MS) after pressurized digestion. The collaborative study included carrot puree, tomato puree, pineapple, mixed fruit, white wine, peach powder, tomato powder, beans powder, powdered fruit yoghurt and fish powder foodstuffs having a mass fraction of tin ranging from 2,5 mg/kg to 259 mg/kg. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 13805, Foodstuffs — Determination of trace elements — Pressure digestion 3 Principle The sample is mineralized through pressurized digestion with nitric acid and hydrochloric acid in accordance with EN 13805. The digestion solution obtained thereby is diluted and then atomised and ionised in an inductively coupled argon plasma. After extraction from the plasma by a system of sampler and skimmer cones the positive (charged) tin ions are separated according to their mass charge ratio in a mass spectrometer and quantified in a detector system. 4 Reagents 4.1 General The concentration of tin in the reagents and water used shall be low enough not to affect the results of the determination. Solution shall be understood as an aqueous solution unless otherwise specified. 4.2 Nitric acid, mass fraction w(HNO3) ≥ 65 %, mass concentration ρ(HNO3) ≈ 1,4 g/ml. 4.3 Hydrochloric acid, w(HCl) ≥ 30 %, density ρ(HCl) ≈ 1,15 g/ml. 4.4 Stock solutions 4.4.1 Tin stock solution, mass concentration ρ(Sn) = 1 000 mg/l. 4.4.2 Rhodium stock solution (internal standard), mass concentration ρ(Rh) = 1 000 mg/l. 4.5 Standard solutions 4.5.1 Tin standard solution 1, mass concentration ρ(Sn) = 50 mg/l Fill a 50 ml volumetric flask with 10 ml to 20 ml of water, add 2,5 ml of hydrochloric acid (4.3) and mix. Cool to ambient temperature, and add by means of a pipette exactly 2,5 ml of tin stock solution (4.4.1) and dilute to volume with water. This solution is stable for at least one week. SIST EN 15765:2010
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