EN 15558:2009
(Main)Fertilizers - Determination of nitric and ammoniacal nitrogen according to Ulsch
Fertilizers - Determination of nitric and ammoniacal nitrogen according to Ulsch
This European Standard specifies a method for the determination of nitrate and ammoniacal nitrogen with reduction according to Ulsch.
The method is applicable to all nitrogenous fertilizers, including compound fertilizers, in which nitrogen is found exclusively in nitrate form, or in ammoniacal and nitrate form.
Düngemittel - Bestimmung von Nitrat- und Ammoniumstickstoff nach Ulsch
Diese Europäische Norm legt ein Verfahren zur Bestimmung von Nitrat- und Ammoniumstickstoff mit Reduk-tion nach Ulsch fest.
Dieses Verfahren ist auf alle stickstoffhaltigen Düngemittel einschließlich Mehrnährstoffdünger anwendbar, in denen Stickstoff ausschließlich als Nitratstickstoff oder als Ammonium- und Nitratstickstoff vorliegt.
Engrais - Dosage de l'azote nitrique et ammoniacal selon Ulsch
La présente Norme européenne prescrit une méthode de dosage de l’azote nitrique et ammoniacal, avec
réduction, selon Ulsch.
La présente méthode est applicable à tous les engrais azotés, y compris les engrais composés où l’azote se
trouve exclusivement sous forme nitrique ou sous forme ammoniacale et nitrique.
Trdna gnojila - Določevanje nitratnega in amonijevega dušika po Ulschu
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.OVFKXDüngemittel - Bestimmung von Nitrat- und Ammoniumstickstoff nach UlschEngrais - Dosage de l'azote nitrique et ammoniacal selon UlschFertilizers - Determination of nitric and ammoniacal nitrogen according to Ulsch65.080GnojilaFertilizersICS:Ta slovenski standard je istoveten z:EN 15558:2009SIST EN 15558:2009en,fr,de01-junij-2009SIST EN 15558:2009SLOVENSKI
STANDARDSIST-TS CEN/TS 15558:20081DGRPHãþD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 15558January 2009ICS 65.080Supersedes CEN/TS 15558:2007
English VersionFertilizers - Determination of nitric and ammoniacal nitrogenaccording to UlschEngrais - Dosage de l'azote nitrique et ammoniacal selonUlschDüngemittel - Bestimmung von Nitrat- undAmmoniumstickstoff nach UlschThis 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 15558:2009: ESIST EN 15558:2009
1 Scope This European Standard specifies a method for the determination of nitrate and ammoniacal nitrogen with reduction according to Ulsch. The method is applicable to all nitrogenous fertilizers, including compound fertilizers, in which nitrogen is found exclusively in nitrate form, or in ammoniacal and nitrate form. 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 1482-2, Fertilizers and liming materials — Sampling and sample preparation — Part 2: Sample preparation EN 12944-1:1999, Fertilizers and liming materials and soil improvers — Vocabulary— Part 1: General terms EN 12944-2:1999, Fertilizers and liming materials and soil improvers — Vocabulary— Part 2: Terms relating to fertilizers 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 Reduction of nitrates and nitrites to ammonia by means of metallic iron in an acid medium and displacement of the ammonia thus formed by the addition of an excess of sodium hydroxide: distillation of the ammonia and determination of the yield of ammonia in a known volume of standard sulfuric acid solution and titration of the excess sulfuric acid by means of a standard solution of sodium or potassium hydroxide. 5 Reagents 5.1 General Use only reagents of recognized analytical grade and distilled or demineralized water, free from carbon dioxide and all nitrogenous compounds (grade 3 according to EN ISO 3696:1995). 5.2 Diluted hydrochloric acid Mix one volume of concentrated hydrochloric acid solution, ρ(HCl) = 1,18 g/ml, with one volume of water. SIST EN 15558:2009
Key 1 round-bottomed, long-necked flask o
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