BS EN 15561-2009 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates《肥料 含硝酸盐的氰胺化钙中总氮含量的测定》.pdf
《BS EN 15561-2009 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates《肥料 含硝酸盐的氰胺化钙中总氮含量的测定》.pdf》由会员分享,可在线阅读,更多相关《BS EN 15561-2009 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates《肥料 含硝酸盐的氰胺化钙中总氮含量的测定》.pdf(18页珍藏版)》请在麦多课文档分享上搜索。
1、BS EN 15561:2009ICS 65.080NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDFertilizers Determination of totalnitrogen in calciumcyanamide containingnitratesThis British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 30 Ju
2、ne 2009 BSI 2009ISBN 978 0 580 62389 9Amendments/corrigenda issued since publicationDate CommentsBS EN 15561:2009National forewordThis British Standard is the UK implementation of EN 15561:2009. Itsupersedes DD CEN/TS 15561:2007 which is withdrawn.The UK participation in its preparation was entruste
3、d to TechnicalCommittee CII/37, Fertilisers and related chemicals.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application
4、.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS EN 15561:2009EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 15561January 2009ICS 65.080 Supersedes CEN/TS 15561:2007 English VersionFertilizers - Determination of total nitrogen in calcium cyanamidecontaining nitr
5、atesEngrais - Dosage de lazote total dans la cyanamidecalcique nitrateDngemittel - Bestimmung von Gesamtstickstoff innitrathaltigem KalkstickstoffThis European Standard was approved by CEN on 6 December 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate th
6、e conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in
7、three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of
8、Austria, Belgium, 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 COM
9、MITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2009 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15561:2009: EBS EN 15561:2009EN 15561:2
10、009 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Principle 4 5 Reagents .4 6 Apparatus .6 7 Sampling and sample preparation 11 8 Procedure 11 9 Calculation and expression of the result . 13 10 Test report . 14 Bibliography . 15 BS EN 15561:2009EN 155
11、61:2009 (E) 3 Foreword This document (EN 15561:2009) has been prepared by Technical Committee CEN/TC 260 “Fertilizers and liming materials”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or
12、 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 may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for id
13、entifying any or all such patent rights. This document supersedes CEN/TS 15561:2007. 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 organization
14、s 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, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
15、Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 15561:2009EN 15561:2009 (E) 4 1 Scope This European Standard specifies a method for the determination of total nitrogen in calcium cyanamide. The method is applicable to calcium cyanamide containing nitrates. 2 Normative re
16、ferences 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 the referenced document (including any amendments) applies. EN 1482-2, Fertilizers and liming materi
17、als 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 liming materials and soil improvers Vocabulary Part 2: Terms relating to fertilizers EN ISO 3696:1995,
18、 Water for analytical laboratory use Specification and test methods (ISO 3696:1987) 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 Reduction of nitrate nitrogen to ammonia with metallic iron and sta
19、nnous chloride solution. Digestion in sulfuric acid. Distillation of the ammonia from an alkaline solution, absorption in an excess of standard sulfuric acid solution and back-titration with standard sodium or potassium hydroxide solution. 5 Reagents 5.1 General Use only reagents of recognized analy
20、tical grade and distilled or demineralized water, free from carbon dioxide and all nitrogenous compounds (grade 3 according to EN ISO 3696:1995). 5.2 Sulfuric acid, = 1,84 g/ml. 5.3 Powdered iron, reduced in hydrogen. 5.4 Potassium sulfate, p.a., finely pulverized. 5.5 Sulfuric acid (for variant a),
21、 c = 0,05 mol/l. BS EN 15561:2009EN 15561:2009 (E) 5 5.6 Sodium or potassium hydroxide standard solution (for variant a), carbonate free, c = 0,1 mol/l. 5.7 Sulfuric acid (for variant b, see NOTE in 8.2), c = 0,1 mol/l. 5.8 Sodium or potassium hydroxide standard solution (for variant b, see NOTE in
22、8.2), carbonate free, c = 0,2 mol/l. 5.9 Sulfuric acid (for variant c, see NOTE in 8.2), c = 0,25 mol/l. 5.10 Sodium or potassium hydroxide standard solution (for variant c, see NOTE in 8.2), carbonate free, c = 0,5 mol/l. 5.11 Indicator solutions 5.11.1 Mixed indicator Solution A: Dissolve 1 g of m
23、ethyl red in 37 ml of sodium hydroxide solution c = 0,1 mol/l and make up to 1 l with water. Solution B: Dissolve 1 g of methylene blue in water and make up to 1 l. Mix one volume of solution A with two volumes of solution B. This indicator is violet in acid solution, grey in neutral solution and gr
24、een in alkaline solution. Use 0,5 ml (10 drops) of this indicator solution. 5.11.2 Methyl red indicator solution Dissolve 0,1 g of methyl red in 50 ml of 95 % ethanol. Make up to 100 ml with water and filter if necessary. This indicator may be used (4 to 5 drops) instead of that specified in 5.11.1.
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