1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 15919:2011Fertilizers Extraction ofphosphorus soluble in 2 %formic acidBS EN 15919:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of E
2、N 15919:2011. Itsupersedes DD CEN/TS 15919:2009 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee CII/37, Fertilisers and related chemicals.A list of organizations represented on this committee can beobtained on request to its secretary.This publication d
3、oes not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 72725 2ICS 65.080Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of t
4、heStandards Policy and Strategy Committee on 30 June 2011.Amendments issued since publicationDate Text affectedBS EN 15919:2011EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15919 June 2011 ICS 65.080 Supersedes CEN/TS 15919:2009English Version Fertilizers - Extraction of phosphorus soluble in
5、 2 % formic acid Engrais - Extraction du phosphore soluble dans lacide formique 2 % Dngemittel - Extraktion des in 2%iger Ameisensure lslichen Phosphors This European Standard was approved by CEN on 29 April 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipul
6、ate the conditions for giving 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-CENELEC Management Centre or to any CEN member. This European St
7、andard exists in three official versions (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-CENELEC Management Centre has the same status as the official versions. CEN members are the n
8、ational standards bodies of Austria, Belgium, Bulgaria, Croatia, 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, Swit
9、zerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No.
10、 EN 15919:2011: EBS EN 15919:2011EN 15919:2011 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Sampling .4 5 Principle 4 6 Reagents .4 7 Apparatus .4 8 Procedure .5 Bibliography 6 BS EN 15919:2011EN 15919:2011 (E) 3 Foreword This document (EN 15919:2011
11、) has been prepared by Technical Committee CEN/TC 260 “Fertilizers and liming materials”, 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 or by endorsement, at the latest by December 2011, an
12、d conflicting national standards shall be withdrawn at the latest by December 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. Th
13、is document supersedes CEN/TS 15919:2009. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to i
14、mplement this European Standard: Austria, Belgium, Bulgaria, Croatia, 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,
15、 Switzerland and the United Kingdom. BS EN 15919:2011EN 15919:2011 (E) 4 1 Scope This document specifies the procedure for the determination of phosphorus soluble in 2 % formic acid (20 g per litre). The method is applicable to soft natural phosphates exclusively. 2 Normative references The followin
16、g 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 samp
17、le 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 CEN/TS 15959, Fertilizers Determinatio
18、n of extracted phosphorus 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 Sampling Sampling is not part of the method specified in this document. A recommended sampling method is given in EN 1482-1. Sample pre
19、paration shall be carried out in accordance with EN 1482-2. Grinding is recommended for homogeneity reasons. 5 Principle To differentiate between hard natural phosphates and soft natural phosphates, phosphorus soluble in formic acid is extracted from the test portion with a 2 % formic acid solution
20、under specified conditions. 6 Reagents 6.1 Water, distilled or demineralised. 6.2 Formic acid, 2 % ( = 20 g/l). Make 82 ml of formic acid (concentration 98 % to 100 %; d20= 1,22 g/ml) up to 5 l with distilled water. 7 Apparatus 7.1 Common laboratory equipment and glassware. BS EN 15919:2011EN 15919:
21、2011 (E) 5 7.2 500 ml graduated flask, with a wide neck (e.g. Stohmann). 7.3 Rotary shaker, 35 turns to 40 turns per min. 7.4 Dry pleated filter, free from phosphates. 8 Procedure 8.1 Test portion Weigh, to the nearest 0,001 g, 5 g of the laboratory sample and place it in a dry 500 ml graduated flas
22、k (7.2). 8.2 Extraction While continuously rotating the flask by hand, add formic acid (6.2) to the test portion at (20 1) C until it is approximately 1 cm below the graduation mark and make up to the volume with formic acid (6.2). Close the flask with a rubber stopper and shake for 30 min at (20 2)
23、 C on a rotary shaker (7.3). Filter the solution through a dry pleated filter (7.4) into a dry glass receptacle. Discard the first portion of the filtrate. Continue the filtering until a sufficient quantity of filtrate is obtained to carry out the phosphorus determination according to CEN/TS 15959.
24、BS EN 15919:2011EN 15919:2011 (E) 6 Bibliography 1 EN 1482-1, Fertilizers and liming materials Sampling and sample preparation Part 1: Sampling 2 Regulation (EC) No 2003/2003 of the European Parliament and of the Council of 13 October 2003 relating to fertilisers, Official Journal L 304, 21/11/2003,
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