BS EN 15477-2009 Fertilizers Determination of the water-soluble potassium content1.pdf
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1、BS EN 15477:2009 ICS 65.080 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Fertilizers Determination of the water-soluble potassium content This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2
2、009 BSI 2009 ISBN 978 0 580 62383 7 Amendments/corrigenda issued since publication DateComments BS EN 15477:2009 National foreword This British Standard is the UK implementation of EN 15477:2009. It supersedes DD CEN/TS 15477:2006 which is withdrawn. The UK participation in its preparation was entru
3、sted to Technical Committee CII/37, Fertilisers and related chemicals. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct app
4、lication. Compliance with a British Standard cannot confer immunity from legal obligations. BS EN 15477:2009 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15477 January 2009 ICS 65.080Supersedes CEN/TS 15477:2006 English Version Fertilizers - Determination of the water-soluble potassium conte
5、nt Engrais - Dtermination de la teneur en potassium soluble dans leau Dngemittel - Bestimmung von wasserlslichem Kalium This 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
6、this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three official versio
7、ns (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium,
8、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 STAN
9、DARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2009 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15477:2009: E BS EN 15477:2009 EN 15477:2009 (E) 2
10、 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Principle 4 5 Reagents .4 6 Apparatus .5 7 Sampling and sample preparation .5 8 Procedure .5 9 Calculation and expression of the result 7 10 Precision .8 11 Test report 9 Annex A (informative) Results of the in
11、ter-laboratory tests 10 Bibliography . 11 w w w . b z f x w . c o m BS EN 15477:2009 EN 15477:2009 (E) 3 Foreword This document (EN 15477:2009) has been prepared by Technical Committee CEN/TC 260 “Fertilizers and liming materials”, the secretariat of which is held by DIN. This European Standard shal
12、l be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by July 2009, and conflicting national standards shall be withdrawn at the latest by July 2009. Attention is drawn to the possibility that some of the elements of this document m
13、ay be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes CEN/TS 15477:2006. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Associat
14、ion. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, It
15、aly, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. w w w . b z f x w . c o m BS EN 15477:2009 EN 15477:2009 (E) 4 1 Scope This European Standard specifies a method for the determination of
16、water-soluble potassium, which is applicable to all potassium fertilizers listed in Annex I of the Regulation (EC) No 2003/2003 3. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. F
17、or 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: Gene
18、ral 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 an
19、d definitions given in EN 12944-1:1999 and EN 12944-2:1999 apply. 4 Principle The potassium in the sample to be analyzed is dissolved in water. After eliminating or fixing the substances that might interfere with the quantitative determination, the potassium is precipitated in a slightly alkaline me
20、dium in the form of potassium tetraphenylborate. 5 Reagents 5.1 General Use only reagents of recognized analytical grade and distilled or demineralized water (grade 3 according to EN ISO 3696:1995). 5.2 Formaldehyde, clear formaldehyde solution with a mass fraction of 25 % to 35 % formaldehyde. 5.3
21、Potassium chloride, p. a. 5.4 Sodium hydroxide solution, c = 10 mol/l. Care should be taken to ensure that only potassium free sodium hydroxide is used. 5.5 Indicator solution Dissolve 0,5 g of phenolphthalein in ethanol at 90 % and make the volume up to 100 ml. w w w . b z f x w . c o m BS EN 15477
22、:2009 EN 15477:2009 (E) 5 5.6 EDTA solution Dissolve 4 g of the dihydrated disodium salt of ethylenediaminetetraacetic acid in water in a 100 ml graduated flask. Make up the volume and mix. Store the reagent in a plastics container. 5.7 STPB solution Dissolve 32,5 g of sodium tetraphenylborate in 48
23、0 ml of water, add 2 ml of the sodium hydroxide solution (5.4) and 20 ml of a magnesium chloride solution (100 g of MgCl2 6H2O per litre). Stir for 15 min and filter through a fine, ashless filter. Store this reagent in a plastics container. 5.8 Liquid for washing Dilute 20 ml of the STPB solution (
24、5.7) to 1 000 ml with water. 5.9 Bromine water, saturated bromine solution in water. 6 Apparatus 6.1 Graduated flasks, capacity 1 000 ml. 6.2 Beaker, capacity 250 ml and 600 ml. 6.3 Filter crucibles, porosity 5 m to 20 m. 6.4 Oven, regulated at (120 10) C. 6.5 Desiccator 7 Sampling and sample prepar
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