1、December 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).IC
2、S 65.080!$xY“1855492www.din.deDDIN EN 15956Fertilizers Extraction of phosphorus soluble in mineral acidsEnglish translation of DIN EN 15956:2011-12Dngemittel Extraktion des in Mineralsuren lslichen PhosphorsEnglische bersetzung von DIN EN 15956:2011-12Engrais Extraction du phosphore soluble dans les
3、 acides minrauxTraduction anglaise de DIN EN 15956:2011-12SupersedesDIN SPEC 1169(DIN CEN/TS 15956):2010-03www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 8 pages11.11 DIN EN 15956:2011-12 A comma is used as the decimal marker. National
4、 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 (Food and
5、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 3.1.1 (see Bibliography). DIN EN 15956 supersedes DIN SPEC 1169 (DIN CEN/TS 15956):2010
6、-03, which has been adopted as a European Standard based on the results of the unique acceptance procedure. Amendments This standard differs from DIN SPEC 1169 (DIN CEN/TS 15956):2010-03 as follows: a) the DIN SPEC prestandard status has been changed to that of a European standard; b) the standard h
7、as been editorially revised. Previous editions DIN SPEC 1169 (DIN CEN/TS 15956): 2010-03 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15956 September 2011 ICS 65.080 Supersedes CEN/TS 15956:2009English Version Fertilizers - Extraction of phosphorus soluble in mineral acids Engrais - Extrac
8、tion du phosphore soluble dans les acides minraux Dngemittel - Extraktion des in Mineralsuren lslichen Phosphors This European Standard was approved by CEN on 18 August 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Euro
9、pean 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 Standard exists in three official version
10、s (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 national standards bodies of Austria, Be
11、lgium, 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, Switzerland and United Kingdom. Management
12、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. EN 15956:2011: EEUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGEN 15956:2011 (E) 2 Conte
13、nts Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .44 Principle 45 Sampling .46 Reagents .47 Apparatus .58 Procedure .59 Test report 5Bibliography 6DIN EN 15956:2011-12 EN 15956:2011 (E) 3 Foreword This document (EN 15956:2011) has been prepared by Technical Committee CEN/T
14、C 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 March 2012, and conflicting national standards shall be withdrawn
15、 at the latest by March 2012. 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. This document supersedes CEN/TS 15956:2009. The followin
16、g changes have been made to the former: a) the CEN Technical Specification has been adopted as a European Standard; b) the document has been editorially revised. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. According
17、 to the CEN/CENELEC 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,
18、Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 15956:2011-12 EN 15956:2011 (E) 4 1 Scope This document specifies a method for the determination of phosphorus soluble in mineral acids.
19、 The method is applicable exclusively to phosphate fertilizers listed in Regulation (EC) 2003/2003, Annex I (see 2). 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 ref
20、erences, 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 1
21、2944-2:1999, Fertilizers and liming materials and soil improvers Vocabulary Part 2: Terms relating to fertilizers 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 Extraction of the phosphorus in the f
22、ertilizer with a mixture of nitric acid and sulfuric acid under the specified conditions. 5 Sampling Sampling 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 of t
23、he laboratory sample is recommended for homogeneity reasons. 6 Reagents 6.1 Water, distilled or demineralized. 6.2 Sulfuric acid, = 1,84 g/ml. 6.3 Nitric acid, = 1,40 g/ml. DIN EN 15956:2011-12 EN 15956:2011 (E) 5 7 Apparatus 7.1 Standard laboratory equipment. 7.2 Kjeldahl flask, capacity at least 5
24、00 ml, or 250 ml round-bottomed flask with a glass tube forming a reflux condenser. 7.3 500 ml graduated flask. 7.4 Dry pleated filter, phosphate free. 8 Procedure 8.1 Test portion Weigh, to the nearest 0,001 g, 2,5 g of the laboratory sample and place it in a dry Kjeldahl flask (7.2). 8.2 Extractio
25、n Add 15 ml of water (6.1) to the test portion and stir so as to suspend the substance. Add 20 ml of nitric acid (6.3) and carefully add 30 ml of sulfuric acid (6.2). When the initial violent reaction has ceased, slowly bring the contents of the flask to boiling and boil for 30 min. Allow to cool an
26、d then carefully add with mixing about 150 ml of water (6.1). Continue boiling for 15 min. Cool completely and transfer the liquid quantitatively to a graduated flask (7.3). Make up to volume, mix and filter through a dry pleated filter (7.4), discarding the first portion of the filtrate. 9 Test rep
27、ort The test report shall contain at least the following information: a) all information necessary for the complete identification of the sample; b) test method used with reference to this document; c) test results obtained; d) date of sampling and sampling procedure (if known); e) date when the ana
28、lysis was finished; f) whether the requirement of the repeatability limit has been fulfilled; g) all operating details not specified in this document, or regarded as optional, together with details of any incidents occurred when performing the method, which might have influenced the test result(s).
29、DIN EN 15956:2011-12 EN 15956:2011 (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, P. 0001-0194, Annex I and Annex IV, method 3.1.1 DIN EN 15956:2011-12
