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“1855493www.din.deDDIN EN 15926Fertilizers Extraction of water soluble sulfur where the sulfur is in various formsEnglish translation of DIN EN 15926:2011-12Dngemittel Extraktion von wasserlslichem Schwefel, der in verschiedener Form vorliegen kannEnglische bersetzung von DIN EN 15926:20
3、11-12Engrais Extraction du soufre soluble dans leau, lorsque le soufre est prsent sous diffrentesformesTraduction anglaise de DIN EN 15926:2011-12SupersedesDIN SPEC 1112(DIN CEN/TS 15926):2010-02www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document com
4、prises 9 pages11.11 DIN EN 15926:2011-12 A comma is used as the decimal marker. 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 prep
5、aration was the Normenausschuss Lebensmittel und landwirtschaftliche Produkte (Food 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
6、 8.4 (see Bibliography). DIN EN 15926 supersedes DIN SPEC 1112 (DIN CEN/TS 15926):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 1112 (DIN CEN/TS 15926):2010-02 as follows: a) the DIN SPEC
7、 prestandard status has been changed to that of a full standard; b) normative references have been updated; c) Clause 9 “Test report” has been added; d) the standard has been editorially revised. Previous editions DIN CEN/TS 15926: 2010-02 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15926
8、 September 2011 ICS 65.080 Supersedes CEN/TS 15926:2009English Version Fertilizers - Extraction of water soluble sulfur where the sulfur is in various forms Engrais - Extraction du soufre soluble dans leau, lorsque le soufre est prsent sous diffrentes formes Dngemittel - Extraktion von wasserlsliche
9、m Schwefel, der in verschiedener Form vorliegen kann 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 European Standard the status of a national standard without any
10、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 versions (English, French, German). A version in any other language
11、 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, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, E
12、stonia, 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 Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All right
13、s of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15926:2011: EEUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG EN 15926:2011 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Ter
14、ms and definitions .44 Principle 45 Sampling .46 Reagents .47 Apparatus .58 Procedure .59 Test report 6Bibliography 7DIN EN 15926:2011-12 EN 15926:2011 (E) 3 Foreword This document (EN 15926:2011) has been prepared by Technical Committee CEN/TC 260 “Fertilizers and liming materials”, the secretariat
15、 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 at the latest by March 2012. Attention is drawn to the p
16、ossibility 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 15926:2009. The following changes have been made to the former edition: a) the CE
17、N Technical Specification has been adopted as a European Standard; b) Clause 9 “Test report“ has been added; c) 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 to the
18、 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, Latvia,
19、 Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 15926:2011-12 EN 15926:2011 (E) 4 1 Scope This document specifies a method for the extraction of water-soluble sulfur contained in fertilizers
20、in various forms. The method is applicable to EC-fertilizers for which a declaration of the water-soluble sulfur trioxide is provided for. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited ap
21、plies. For 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
22、 1: General terms EN 12944-2:1999, Fertilizers and liming materials and soil improvers Vocabulary Part 2: Terms relating to fertilizers EN 15749, Fertilizers Determination of sulfates content using three different methods 3 Terms and definitions For the purposes of this document, the terms and defin
23、itions given in EN 12944-1:1999 and EN 12944-2:1999 apply. 4 Principle The sulfur is dissolved in cold water and converted into sulfate by oxidation with hydrogen peroxide in an alkaline medium. 5 Sampling Sampling is not part of the method specified in this document. A recommended sampling method i
24、s given in EN 1482-1. Sample preparation shall be carried out in accordance with EN 1482-2. Grinding of the laboratory sample is recommended for homogeneity reasons. 6 Reagents Use only reagents of recognized analytical grade and distilled or demineralized water. 6.1 Diluted hydrochloric acid. Mix o
25、ne volume of hydrochloric acid, w = 37 %, with one volume of water. 6.2 Sodium hydroxide solution, w = 30 % to 32 %. DIN EN 15926:2011-12 EN 15926:2011 (E) 5 6.3 Hydrogen peroxide solution, w = 30 %. 7 Apparatus 7.1 500 ml graduated flask, Stohmann. 7.2 Rotary shaker, 30 to 40 turns per minute. 7.3
26、Electric hot plate, with adjustable temperature. 8 Procedure 8.1 Test portion Where fertilizers contain a maximum of 3 % of sulfur (S) i. e. 7,5 % SO3, weigh an amount of 5 g of the laboratory sample of fertilizer to an accuracy of 1 mg. Where fertilizers contain more than 3 % of sulfur (S), weigh a
27、n amount of 1 g of the laboratory sample of fertilizer to an accuracy of 1 mg. Place the test portion in a flask (7.1). 8.2 Preparation of the solution Add approximately 400 ml of water to the test portion in the flask (7.1). Stopper. Shake in the rotary shaker (7.2) for 30 min. Let stand for 24 h a
28、t room temperature without shaking or stirring and make up to volume with water and mix. Pass through a dry filter into a dry container. Stopper if the solution is not to be used immediately. 8.3 Oxidation of the aliquot portion to be analyzed Take an aliquot portion of the extraction solution (see
29、8.2) not exceeding 50 ml and, if possible, containing between 20 mg and 100 mg of sulfur (S). Make up the volume to 50 ml with water, if necessary. Add 3 ml of sodium hydroxide solution (6.2) and 2 ml of hydrogen peroxide solution (6.3). Cover with a watch glass and boil gently for 1 h on the hot pl
30、ate (7.3). Keep adding 1 ml increments of hydrogen peroxide solution for as long as the reaction continues (maximum quantity 5 ml). Then leave to cool. Remove the watch glass and wash the underside into the beaker. Add approximately 20 ml of diluted hydrochloric acid (6.1). Make up to approximately
31、300 ml with water. Determine the content of sulfates on the whole of the oxidized solution in accordance with EN 15749. DIN EN 15926:2011-12 EN 15926:2011 (E) 6 9 Test report The test report shall contain at least the following information: a) the test method used with a reference to this document;
32、b) all information necessary for the complete identification of the sample; c) date of sampling and sampling procedure (if known); d) date when the extraction was finished; e) all operating details not specified in this document, or regarded as optional, together with details of any incidents that o
33、ccurred when performing the method which might have influenced the test result(s). DIN EN 15926:2011-12 EN 15926:2011 (E) 7 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, pp. 1-194, Annex IV, method 8.4 DIN EN 15926:2011-12
