SIST EN 13466-2:2002

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.SURSDQRORPDüngemittel - Bestimmung des Wassergehaltes (Karl-Fischer-Verfahren) - Teil 2: 2-Propanol als ExtraktionsmittelEngrais - Détermination de la teneur en eau (Méthodes Karl Fischer) - Partie 2: 2-propanol comme milieu d'extractionFertilizers - Determination of water content (Karl Fischer methods) - Part 2: 2-propanol as extracting medium65.080GnojilaFertilizersICS:Ta slovenski standard je istoveten z:EN 13466-2:2001SIST EN 13466-2:2002en01-november-2002SIST EN 13466-2:2002SLOVENSKI
STANDARD



SIST EN 13466-2:2002



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13466-2October 2001ICS 65.080English versionFertilizers - Determination of water content (Karl Fischermethods) - Part 2: 2-propanol as extracting mediumEngrais - Détermination de la teneur en eau (Méthodes KarlFischer) - Partie 2: 2-propanol comme milieu d'extractionDüngemittel - Bestimmung des Wassergehaltes (Karl-Fischer-Verfahren) - Teil 2: 2-Propanol als ExtraktionsmittelThis European Standard was approved by CEN on 18 August 2001.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, 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© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13466-2:2001 ESIST EN 13466-2:2002



EN 13466-2:2001 (E)2ContentspageForeword.3Introduction.41Scope.52Normative references.53Principle.54Reagents.55Apparatus.56Installation and test of the Karl Fischer titrator.67Sampling.68Procedure.69Calculation and expression of results.810Precision.811Test report.8Bibliography.10SIST EN 13466-2:2002



EN 13466-2:2001 (E)3ForewordThis European Standard has been prepared by Technical Committee CEN/TC 260 "Fertilizers and limingmaterials", 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 April 2002, and conflicting national standards shall be withdrawn at the latest byApril 2002.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden,Switzerland and the United Kingdom.SIST EN 13466-2:2002



EN 13466-2:2001 (E)4IntroductionThe water content of fertilizers has a significant effect on their quality and, especially, their storage and handlingproperties.Water can be present in a number of forms such as free water, bound water and water of crystallization. It is oftenimportant to be able to distinguish between these forms of water. The gravimetric methods for determination ofwater standardized in EN 12048 and EN 12049 have only limited applicability.The Karl Fischer method is applicable to a wide range of fertilizers. However, there are several variations to thebasic technique, different formulations of the Karl Fischer reagents are commercially available and a number ofdifferent solvents can be used. In this standard, methanol and 2-propanol are used as extracting media todistinguish between the different forms of water present in fertilizers.EN 13466 "Fertilizers – Determination of water content (Karl Fischer methods)" consists of two parts: Part 1 : Methanol as extracting medium Part 2 : 2-propanol as extracting mediumAs examples of the difference between methanol and 2-propanol as extracting media methanol gives a result whichis a combination of free water and extracted water of crystallization from the following components of fertilizers:calcium nitrate tetrahydrate (Ca(NO3)2·4H2O); calcium hydrogen phosphate dihydrate (CaHPO4·2H2O) ; calciumsulfate dihydrate (gypsum, CaSO4·2H2O)
calcium sulfate hemihydrate (CaSO4·0,5H2O) ; magnesium sulfateheptahydrate (MgSO4·7H2O); potassium chloride magnesium sulfate water (1/1/2,75, Kainite, KCl·MgSO4·2,75H2O) ; potassium magnesium sulfate hexahydrate (Schoenite, K2SO4·MgSO4·6H2O) ; potassiummagnesium sulfate tetrahydrate (Leonite, K2SO4·MgSO4·4H2O) ; potassium sulfate calcium sulfate monohydrate(Syngenite, K2SO4·CaSO4·H2O); potassium chloride magnesium chloride hexahydrate (Carnallite, KCl·MgCl2·6H2O); magnesium nitrate hexahydrate (Mg(NO3)2·6H2O).Extraction with 2-propanol gives a result which is a combination of free water and extracted water of crystallizationfrom the following components of fertilizers: calcium nitrate tetrahydrate (Ca(NO3)2·4H2O) ; magnesium sulfateheptahydrate (MgSO4·7H2O); potassium chloride magnesium chloride hexahydrate (Carnallite, KCl·MgCl2·6H2O);magnesium nitrate hexahydrate (Mg(NO3)2·6H2O).SIST EN 13466-2:2002



EN 13466-2:2001 (E)51 ScopeThis European standard specifies a Karl Fischer titrimetric method for the determination of the water content offertilizers based on the use of 2-propanol as extracting medium.The method is applicable to all solid mineral fertilizers. The result (KFP water) includes "free" water and extractedwater of crystallization from the following components of fertilizers: calcium nitrate tetrahydrate (Ca(NO3)2·4H2O);magnesium sulfate heptahydrate (MgSO4·7H2O); potassium chloride magnesium chloride hexahydrate (Carnallite,KCl·MgCl2·6H2O); magnesium nitrate hexahydrate (Mg(NO3)2·6H2O).2 Normativ
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