1、February 2013 Translation by DIN-Sprachendienst.English price group 11No 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).I
2、CS 71.100.80!$R9“1944722www.din.deDDIN EN 12123Chemicals used for treatment of water intended for humanconsumption Ammonium sulfate;English version EN 12123:2012,English translation of DIN EN 12123:2013-02Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch Ammoniumsulfat;Englische Fass
3、ung EN 12123:2012,Englische bersetzung von DIN EN 12123:2013-02Produits chimiques utiliss pour le traitement de leau destine la consommationhumaine Sulfate dammonium;Version anglaise EN 12123:2012,Traduction anglaise de DIN EN 12123:2013-02SupersedesDIN EN 12123:2005-09www.beuth.deIn case of doubt,
4、the German-language original shall be considered authoritative.Document comprises 19 pages 02.13 DIN EN 12123:2013-02 2 A comma is used as the decimal marker. National foreword This document (EN 12123:2012) has been prepared by Technical Committee CEN/TC 164 “Water supply” (Secretariat: AFNOR, Franc
5、e). The responsible German body involved in its preparation was the Normen-ausschuss Wasserwesen (Water Practice Standards Committee), Working Committee NA 119-04-02 AA Wasseraufbereitung. Users of this standard are advised of the reservations stated in the Introduction of the European Standard and
6、should note that national regulations exist in Germany dealing with water for human consumption, in particular the Trinkwasserverordnung (TrinkwV2001) (German Drinking Water Ordinance). Since, as of the publication of this standard, ammonium sulfate is not mentioned in the list of substances for tre
7、atment and disinfection of water in accordance with article 11 of the Trinkwasserverordnung 2001, it shall not be used for the treatment of drinking water. The DIN Standards corresponding to the International Standards referred to in this document are as follows, whereby EN ISO Standards are only li
8、sted below if these have not been published as DIN EN ISO Standards with the same number: EN ISO 3696 DIN ISO 3696 Amendments This standard differs from DIN EN 12123:2005-09 as follows: a) the reference to Directive 67/548/EEC relating to the classification, packing and labelling of dangerous substa
9、nces has been replaced by the reference to Regulation EC No 1272/2008. Previous editions DIN EN 12123: 1999-01, 2005-09 National Annex NA (informative) Bibliography DIN ISO 3696, Water for analytical laboratory use Specification and test methods Verordnung ber die Qualitt von Wasser fr den menschlic
10、hen Gebrauch (Trinkwasserverordnung TrinkwV 2001) (German Drinking Water Ordinance), as of 28 November 2011 (BGBI. I p. 2370), as amended by Article 2, Paragraph 19 of the Act of 22 December 2011 (BGBI. I p. 3044)*)*)Obtainable from: Bundesministerium der Justiz (German Federal Ministry of Justice)
11、(Internet: http:/www.gesetze-im-internet.de). EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12123 November 2012 ICS 71.100.80 Supersedes EN 12123:2005English Version Chemicals used for treatment of water intended for human consumption - Ammonium sulfate Produits chimiques utiliss pour le trai
12、tement de leau destine la consommation humaine - Sulfate dammonium Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Ammoniumsulfat This European Standard was approved by CEN on 23 September 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipu
13、late 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 S
14、tandard 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
15、national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
16、 Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reser
17、ved worldwide for CEN national Members. Ref. No. EN 12123:2012: EEN 12123:2012 (E) 2 Contents Page Foreword 3Introduction .41 Scope 52 Normative references 53 Description .54 Purity criteria 75 Test methods 86 Labelling Transportation Storage . 14Annex A (informative) General information on ammonium
18、 sulfate . 15Bibliography . 17DIN EN 12123:2013-02 EN 12123:2012 (E) 3 Foreword This document (EN 12123:2012) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either
19、 by publication of an identical text or by endorsement, at the latest by May 2013, and conflicting national standards shall be withdrawn at the latest by May 2013. 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
20、 shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12123:2005. Significant technical differences between this edition and EN 12123:2005 are as follows: Modification of 6.2 on labelling, deletion of the reference to EU Directive 80/778/EEC of 15
21、July 1980 in order to take account of the latest Directive in force. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark,
22、 Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 12123:2013-
23、02 EN 12123:2012 (E) 4 Introduction In respect of potential adverse effects on the quality of water intended for human consumption caused by the product covered by this European Standard: a) this European Standard provides no information as to whether the product may be used without restriction in a
24、ny of the Member States of the EU or EFTA; b) it should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulations concerning the use and/or the characteristics of this product remain in force. NOTE Conformity with this European Standard does not confer
25、 or imply acceptance or approval of the product in any of the Member States of the EU or EFTA. The use of the product covered by this European Standard is subject to regulation or control by National Authorities. DIN EN 12123:2013-02 EN 12123:2012 (E) 5 1 Scope This European Standard is applicable t
26、o ammonium sulfate used for treatment of water intended for human consumption. It describes the characteristics and specifies the requirements of ammonium sulfate and refers to the corresponding analytical methods. It gives information on its use in water treatment. 2 Normative references The follow
27、ing documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN ISO 3696, Wate
28、r for analytical laboratory use Specification and test methods (ISO 3696) ISO 760, Determination of water Karl Fischer method (General method) ISO 2992, Ammonium sulphate for industrial use Determination of iron content 2,2- bipyridyl photometric method ISO 2993, Ammonium sulphate for industrial use
29、 Determination of free acidity Titrimetric method ISO 3165, Sampling of chemical products for industrial use Safety in sampling ISO 3332, Ammonium sulphate for industrial use Determination of ammoniacal nitrogen content Titrimetric method after distillation ISO 5993, Sodium hydroxide for industrial
30、use Determination of mercury content Flameless atomic absorption spectrometric method ISO 6206, Chemical products for industrial use Sampling Vocabulary ISO 6353-1, Reagents for chemical analysis Part 1: General test methods ISO 8213, Chemical products for industrial use Sampling techniques Solid ch
31、emical products in the form of particles varying from powders to coarse lumps 3 Description 3.1 Identification 3.1.1 Chemical name Ammonium sulfate. 3.1.2 Synonym or common name Ammonium sulfate. 3.1.3 Relative molecular mass 132,14. DIN EN 12123:2013-02 EN 12123:2012 (E) 6 3.1.4 Empirical formula (
32、NH4)2SO4.3.1.5 Chemical formula (NH4)2SO4.3.1.6 CAS-Registry Number 1)7783-20-2. 3.1.7 EINECS reference 2)213-984-1. 3.2 Commercial form The product is a powder. 3.3 Physical properties 3.3.1 Appearance The product is a white, fine crystalline powder. 3.3.2 Density The density of the product is 1,8
33、g/cm at 20 C. 3.3.3 Solubility in water The solubility of the product in water is 767 g/l at 25 C. 3.3.4 Vapour pressure Not applicable. 3.3.5 Boiling point at 100 kPa 3)Not applicable. 3.3.6 Crystallisation point The product decomposes above 235 C. 3.3.7 Specific heat Not known. 1) Chemical Abstrac
34、ts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. 3) 100 kPa = 1 bar. DIN EN 12123:2013-02 EN 12123:2012 (E) 7 3.3.8 Viscosity, dynamic Not applicable. 3.3.9 Critical temperature Not applicable. 3.3.10 Critical pressure Not applicable. 3.3.11 Physical hard
35、ness Not applicable. 3.4 Chemical properties Ammonium sulfate easily dissolves in water. A saturated solution (706 g/l at 0 C) has a pH value of approximately 6. Upon heating with chlorates, nitrates or nitrites it reacts violently. Above 235 C the product decomposes with formation of ammonia vapour
36、, sulfur oxides. 4 Purity criteria 4.1 General This document specifies the minimum purity requirements for ammonium sulfate used for the treatment of water intended for human consumption. Limits are given for impurities commonly present in the product. Depending on the raw material and the manufactu
37、ring process other impurities may be present and, if so, this shall be notified to the user and when necessary to relevant authorities. Users of this product should check the national regulations in order to clarify whether it is of appropriate purity for treatment of water intended for human consum
38、ption, taking into account raw water quality, required dosage, contents of other impurities and additives used in the product not stated in this product standard. Limits have been given for impurities and chemical parameters where these are likely to be present in significant quantities from the cur
39、rent production process and raw materials. If the production process or raw materials leads to significant quantities of impurities, by-products or additives being present, this shall be notified to the user. 4.2 Composition of commercial product The content of ammonium sulfate shall not be less tha
40、n a mass fraction of 99% corresponding to a mass fraction of 21 % of ammoniacal nitrogen. 4.3 Impurities and main by-products The product shall conform to the requirements specified in Table 1. DIN EN 12123:2013-02 EN 12123:2012 (E) 8 Table 1 Impurities Impurity Limit in mg/kg of the product Sulfuri
41、c acid (free) H2SO4 max 200 Water max 300Iron (Fe) max 10 4.4 Chemical parameters The product shall conform to the requirements specified in Table 2. Table 2 Chemical parameters Parameter Limit mg/kg of commercial product Antimony (Sb) max 1 Arsenic (As) max 5 Cadmium (Cd) max 0,5 Chromium (Cr) max
42、5 Lead (Pb) max 5 Mercury (Hg) max 0,1 Nickel (Ni) max 5 Selenium (Se) max 2 NOTE Pesticides and polycyclic aromatic hydrocarbons and cyanides (CN-) are not relevant in ammonium sulfate because the raw materials used in the manufacturing are free of them. For parametric values of ammonium sulfate on
43、 trace metal content in drinking water, see 1. 5 Test methods 5.1 Sampling Observe the general recommendations of ISO 3165 and take account of ISO 6206. Prepare the laboratory sample(s) required by the relevant procedure described in ISO 8213. 5.2 Analyses 5.2.1 Main product The content of ammoniaca
44、l nitrogen (C1), expressed as mass fraction in %, shall be determined in accordance with ISO 3332 (titrimetric method after distillation). The content of ammonium sulfate (NH4)2SO4)(C2), expressed as mass fraction in %, is calculated from the formula: 72,412= CC (1) DIN EN 12123:2013-02 EN 12123:201
45、2 (E) 9 5.2.2 Impurities 5.2.2.1 Water The content of water (H2O) shall be determined in accordance with ISO 760 (Karl Fischer method). 5.2.2.2 Sulfuric acid The content of free sulfuric acid (H2SO4) shall be determined in accordance with ISO 2993. 5.2.2.3 Iron (Fe) The content of iron (Fe) shall be
46、 determined in accordance with ISO 2992. 5.2.3 Chemical parameters 5.2.3.1 General The content of chemical parameters shall be determined using the procedures specified in Table 3: Table 3 Procedures for the determination of chemical parameters Element Reference Method Wavelength (nm) Flame As see 5
47、.2.3.3 Hydride AAS 193,7 n.a.Sb see 5.2.3.3 Hydride AAS 217,6 n.a. Cd ISO 6353-1 GM 29see 5.2.3.2 AAS 228,8 air-acetylene Cr ISO 6353-1 GM 29see 5.2.3.2 AAS 357,8 air-acetylene Pb ISO 6353-1 GM 29see 5.2.3.2 AAS 217,0 or 283,3 air-acetylene Ni ISO 6353-1 GM 29see 5.2.3.2 AAS 232,0 oxidising acetylen
48、e-air Se see 5.2.3.3 Hydride AAS 196,0 n.a.Hg in accordance withISO 5993 flameless AAS 253,6 n.a. AAS = Atomic Absorption Spectroscopy. n.a. = not applicable. DIN EN 12123:2013-02 EN 12123:2012 (E) 10 5.2.3.2 Determination of cadmium (Cd), chromium (Cr), lead (Pb) and nickel (Ni) 5.2.3.2.1 Principle The elements cadmium (Cd), chromium (Cr), lead (Pb) and nickel (Ni) are determined using atomic absorption spectrometry with the standard additions tec
