1、August 2011 Translation by DIN-Sprachendienst.English price group 6No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS
2、65.080!$t2k“1811572www.din.deDDIN EN 15920Fertilizers Extraction of phosphorus soluble in 2 % citric acidEnglish translation of DIN EN 15920:2011-08Dngemittel Extraktion des in 2%iger Citronensure lslichen PhosphorsEnglische bersetzung von DIN EN 15920:2011-08Engrais Extraction du phosphore soluble
3、dans lacide citrique 2 %Traduction anglaise de DIN EN 15920:2011-08SupersedesDIN SPEC 1099(DIN CEN/TS 15920):2010-02www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.808.11 DIN EN 15920:2011-08 A comma is used as the decimal marker.
4、National foreword This standard has been prepared by Technical Committee CEN/TC 260 “Fertilizers and liming materials” (Secretariat: DIN, Germany) under the mandate M/335. The responsible German body involved in its preparation was the Normenausschuss Lebensmittel und landwirtschaftliche Produkte (F
5、ood and Agricultural Products Standards Committee), Working Committee NA 057-03-02 AA Dngemittel. The method specified in this standard is based upon Regulation (EC) No 2003/2003 relating to fertilizers, Annex IV, method 3.1.3 (see Bibliography). DIN EN 15920 supersedes DIN SPEC 1099 (DIN CEN/TS 159
6、20):2010-02, which has been adopted as a European Standard based on the results of the unique acceptance procedure. Amendments This standard differs from DIN SPEC 1099 (DIN CEN/TS 15920):2010-02 as follows: a) in Subclause 8.2, a normative reference to CEN/TS 15959 has been included relating to the
7、determination of phosphorus; b) normative references have been updated; c) the Bibliography has been updated; d) the standard has been editorially revised. Previous editions DIN SPEC 1099 (DIN CEN/TS 15920): 2010-02 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15920 June 2011 ICS 65.080 Su
8、persedes CEN/TS 15920:2009English Version Fertilizers - Extraction of phosphorus soluble in 2 % citric acid Engrais - Extraction du phosphore soluble dans lacide citrique 2 % Dngemittel - Extraktion des in 2%iger Citronensure lslichen Phosphors This European Standard was approved by CEN on 29 April
9、2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate 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 obtaine
10、d on application to the CEN-CENELEC 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 translation under the responsibility of a CEN member into its own language and notified to the CEN-C
11、ENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Ma
12、lta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland 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 exp
13、loitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15920:2011: EEN 15920:2011 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .44 Sampling .45 Principle 46 Reagents .47 Apparatus .58 Procedure .58.1 Test portion 58.2
14、 Extraction .5Bibliography 6DIN EN 15920:2011-08 EN 15920:2011 (E) 3 Foreword This document (EN 15920:2011) 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
15、standard, either by publication of an identical text or by endorsement, at the latest by December 2011, and 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
16、rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes CEN/TS 15920:2009. 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/CE
17、NELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithua
18、nia, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 15920:2011-08 EN 15920:2011 (E) 4 1 Scope This European Standard specifies the procedure for the determination of phosphorus soluble in 2 % citric aci
19、d (20 g/l). The method is applicable only to types of basic slag (see 1, Annex I A). 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 t
20、he 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 lim
21、ing materials and soil improvers Vocabulary Part 2: Terms relating to fertilizers CEN/TS 15959, Fertilizers Determination 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 Sampli
22、ng is not part of the method specified in this document. A recommended sampling method is given in EN 1482-1. Sample preparation shall be carried out in accordance with EN 1482-2. Grinding is recommended for homogeneity reasons. 5 Principle Extraction of phosphorus from the sample with a 2 % citric
23、acid solution (20 g/l) under specified conditions. 6 Reagents 6.1 Water, distilled or demineralized. 6.2 2 % citric acid solution, = 20 g/l, prepared from crystallized citric acid (C6H8O7. H2O). Verify the mass concentration of the citric acid solution by titrating 10 ml of the latter with a sodium
24、hydroxide standard solution, c = 0,1 mol/l, using phenolphthalein as indicator. DIN EN 15920:2011-08 EN 15920:2011 (E) 5 If the solution is correct, 28,55 ml of the standard solution should be used. 7 Apparatus 7.1 Common laboratory equipment and glassware. 7.2 600 ml flask, with sufficiently wide n
25、eck allowing the liquid to be shaken thoroughly. 7.3 Rotary shaker, 35 r/min to 40 r/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 prepared sample and place it in a dry 600 ml flask (7.2). 8.2 Extraction Add to the test port
26、ion (500 1) ml of the citric acid solution (6.2) at (20 1) C. When adding the first millilitres of the solution, shake vigorously by hand to avoid the formation of lumps and to prevent the substance sticking to the sides. Close the flask with a rubber stopper and shake it in the rotary shaker (7.3)
27、for exactly 30 min at a temperature of (20 2) C. Filter the solution immediately through a dry pleated filter (7.4), into a dry glass receiver (7.1) and discard the first 20 ml of the filtrate. Continue the filtering until a sufficient quantity of filtrate is obtained to carry out the phosphorus det
28、ermination according to CEN/TS 15959. DIN EN 15920:2011-08 EN 15920:2011 (E) 6 Bibliography 1 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, P. 0001-0194, Annex IV, method 3.1.3 2 EN 1482-1, Fertilizers and liming materials Sampling and sample preparation Part 1: Sampling DIN EN 15920:2011-08
