EN 15479:2009

Fertilizers - Spectrophotometric determination of biuret in urea

This European Standard specifies a method for the determination of biuret in urea. The method is applicable to urea and urea-based fertilizers.

Düngemittel - Spektrometrische Bestimmung von Biuret in Harnstoff

Diese Europäische Norm legt ein Verfahren zur Bestimmung von Biuret in Harnstoff fest.
Das Verfahren gilt für Harnstoff und für auf Harnstoff basierende Düngemittel.

Engrais - Détermination photométrique du biuret dans l'urée

La présente Norme européenne spécifie une méthode pour le dosage du biuret dans l’urée. La méthode
s’applique à l’urée et aux engrais à base d’urée.

Gnojila - Spektrofotometrijsko določevanje biureta v sečnini

General Information

• Status: Published
• Publication Date: 13-Jan-2009
• ICS: 65.080 - Fertilizers
• Technical Committee: CEN/TC 260 - Fertilizers and liming materials
• Drafting Committee: CEN/TC 260/WG 7 - Chemical analysis
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 05-Feb-2025
• Completion Date: 14-Apr-2025
• Mandate: M/335 - Standardization Mandate assigned to the CEN concerning the modernisation of the methods of anylysis of Fertilizers
• Ref Project: SIST EN 15479:2009 - Fertilizers - Spectrophotometric determination of biuret in urea

Relations

• Replaces: CEN/TS 15479:2006 - Fertilizers - Spectrophotometric determination of biuret in urea
• Effective Date: 08-Jun-2022

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Düngemittel - Spektrometrische Bestimmung von Biuret in HarnstoffEngrais - Détermination photométrique du biuret dans l'uréeFertilizers - Spectrophotometric determination of biuret in urea65.080GnojilaFertilizersICS:Ta slovenski standard je istoveten z:EN 15479:2009SIST EN 15479:2009en,fr,de01-junij-2009SIST EN 15479:2009SLOVENSKI
STANDARDSIST-TS CEN/TS 15479:20061DGRPHãþD

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 15479January 2009ICS 65.080Supersedes CEN/TS 15479:2006
English VersionFertilizers - Spectrophotometric determination of biuret in ureaEngrais - Détermination photométrique du biuret dansl'uréeDüngemittel - Spektrometrische Bestimmung von Biuret inHarnstoffThis European Standard was approved by CEN on 30 November 2008.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 CEN 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 CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2009 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15479:2009: ESIST EN 15479:2009

Results of the inter-laboratory tests .9 Bibliography . 10
EN ISO 3696:1995, Water for analytical laboratory use — Specification and test methods (ISO 3696:1987) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 12944-1:1999 and EN 12944-2:1999 apply. 4 Principle In an alkaline medium in the presence of potassium sodium tartrate, biuret and bivalent copper form a violet cupric compound. The absorbance of the solution is measured at a wavelength of about 546 nm. 5 Reagents 5.1 General Use only reagents of recognized analytical grade and distilled or demineralized water, free from carbon dioxide and ammonia (grade 3 according to EN ISO 3696:1995). The quality of the water is particularly important in this determination. 5.2 Methanol 5.3 Sulfuric acid solution, c = approximately 0,05 mol/l. 5.4 Sodium hydroxide solution, c = approximately 0,1 mol/l. 5.5 Alkaline solution of potassium sodium tartrate In a graduated one-litre flask, dissolve 40 g of sodium hydroxide in 500 ml of water and leave to cool. Add 50 g of potassium sodium tartrate (NaKC4H4O6 4H2O). Make up to the mark and leave standing for 24 h before use. SIST EN 15479:2009
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