1、February 2013 Translation by DIN-Sprachendienst.English price group 12No 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!$g:“1946823www.din.deDDIN EN 897Chemicals used for treatment of water intended for humanconsumption Sodium carbonate;English version EN 897:2012,English translation of DIN EN 897:2013-02Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch Natriumcarbonat;Englische Fassung E
3、N 897:2012,Englische bersetzung von DIN EN 897:2013-02Produits chimiques utiliss pour le traitement de leau destine la consommationhumaine Carbonate de sodium;Version anglaise EN 897:2012,Traduction anglaise de DIN EN 897:2013-02SupersedesDIN EN 897:2005-09www.beuth.deDocument comprises 22 pagesIn c
4、ase of doubt, the German-language original shall be considered authoritative.02.13DIN EN 897:2013-02 2 A comma is used as the decimal marker. National foreword This document (EN 897:2012) has been prepared by Technical Committee CEN/TC 164 “Water supply” (Secretariat: AFNOR, France). The responsible
5、 German body involved in its preparation was the Normenausschuss 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 should note that nat
6、ional regulations exist in Germany dealing with water for human consumption, in particular the Trinkwasserverordnung (TrinkwV2001) (German Drinking Water Ordinance). The DIN Standards corresponding to the International Standards referred to in this document are as follows, whereby EN ISO Standards a
7、re only listed 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 897:2005-09 as follows: a) specifications concerning hazard and safety related symbols have been brought in line with the “Globall
8、y Harmonized System of Classification, Labelling and Packaging of Chemicals (GHS)” (Global harmonisiertes System zur Einstufung und Kennzeichnung von Chemikalien). Previous editions DIN 19612: 1958-05, 1969-05, 1988-07 DIN EN 897: 1998-12, 2005-09 National Annex NA (informative) Bibliography DIN ISO
9、 3696, Water for analytical laboratory use Specification and test methods Verordnung ber die Qualitt von Wasser fr den menschlichen 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
10、Act of 22 December 2011 (BGBI. I p. 3044)*)*)Obtainable from: Bundesministerium der Justiz (German Federal Ministry of Justice) (Internet: http:/www.gesetze-im-internet.de). EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 897 November 2012 ICS 71.100.80 Supersedes EN 897:2005English Version Che
11、micals used for treatment of water intended for human consumption - Sodium carbonate Produits chimiques utiliss pour le traitement de leau destine la consommation humaine - Carbonate de sodium Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Natriumcarbonat This European Standard
12、was approved by CEN on 16 September 2012. 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 su
13、ch 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 made by translation under the responsibility of a CEN member into its ow
14、n 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, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
15、Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORM
16、UNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 897:2012: EEN 897:2012 (E) 2 Contents Page Foreword 3Introduction .41 Scope 52 Normative references 53 Description .54 Pu
17、rity criteria 75 Test methods 86 Labelling Transportation Storage . 10Annex A (informative) General information on sodium carbonate . 12Annex B (normative) Analytical methods 13Annex C (normative) General rules relating to safety . 19Bibliography . 20DIN EN 897:2013-02 EN 897:2012 (E) 3 Foreword Thi
18、s document (EN 897:2012) 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 by publication of an identical text or by endorsement, at the latest by May 2013, an
19、d 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 shall not be held responsible for identifying any or all such patent rights. This do
20、cument supersedes EN 897:2005. Significant technical differences between this edition and EN 897:2005 are as follows: a) Modification of 6.2 on labelling, deletion of the reference to EU Directive 80/778/EEC of 15 July 1980 in order to take account of the latest Directive in force. According to the
21、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, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hun
22、gary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 897:2013-02 EN 897:2012 (E) 4 Introduction In respect of potential adverse effects on the quality
23、 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 any of the Member States of the EU or EFTA; b) it should be noted that, while awaiting the
24、 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 or imply acceptance or approval of the product in any of the Member States of the EU or
25、EFTA. The use of the product covered by this European Standard is subject to regulation or control by National Authorities. DIN EN 897:2013-02 EN 897:2012 (E) 5 1 Scope This European Standard is applicable to sodium carbonate used for treatment of water intended for human consumption. It describes t
26、he characteristics and specifies the requirements and the corresponding test methods for sodium carbonate. It gives information on its use in water treatment. It also determines the rules relating to safe handling and use (see Annex C). 2 Normative references The following documents, in whole or in
27、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, Water for analytical laboratory us
28、e Specification and test methods (ISO 3696) EN ISO 12846:2012, Water quality Determination of mercury Method using atomic absorption spectrometry (AAS) with and without enrichment (ISO 12846:2012) ISO 740, Sodium carbonate for industrial use Determination of total soluble alkalinity Titrimetric meth
29、od ISO 746, Sodium carbonate for industrial use Determination of matter insoluble in water at 50 degrees C ISO 2460, Sodium hydrogen carbonate for industrial use Determination of iron content 1,10-Phenanthroline photometric method ISO 3165, Sampling of chemical products for industrial use Safety in
30、sampling ISO 6206, Chemical products for industrial use Sampling Vocabulary ISO 8213, Chemical products for industrial use Sampling techniques Solid chemical products in the form of particles varying from powders to coarse lumps 3 Description 3.1 Identification 3.1.1 Chemical name Sodium carbonate.
31、3.1.2 Synonym or common name Soda ash, anhydrous sodium carbonate, light soda ash, heavy soda ash. 3.1.3 Relative molecular mass 105,99. 3.1.4 Empirical formula Na2CO3.DIN EN 897:2013-02 EN 897:2012 (E) 6 3.1.5 Chemical formula Na2CO3.3.1.6 CAS Registry Number1)497-19-8. 3.1.7 EINECS reference2)207-
32、838-8. 3.2 Commercial forms The product is available as dry powder or fine granules and is described as light soda ash or heavy soda ash according to bulk density (see 3.3.2). 3.3 Physical properties 3.3.1 Appearance The product is a white powder or crystals, slightly hygroscopic. 3.3.2 Density The
33、density of this product is 2,53 g/cm3. The bulk density is: ranging from 0,5 kg/dm3to 0,65 kg/dm3(light soda ash); ranging from 0,8 kg/dm3to 1,2 kg/dm3(heavy soda ash). 3.3.3 Solubility in water The product is soluble at 212 g/l at 20 C. 3.3.4 Vapour pressure Not applicable. 3.3.5 Boiling point at 1
34、00 kPa3)Not applicable. 3.3.6 Melting point 851 C. 1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. 3) 100 kPa = 1 bar. DIN EN 897:2013-02 EN 897:2012 (E) 7 3.3.7 Specific heat 1,043 J/(kg K). 3.3.8 Viscosity (dynamic) Not applicable. 3
35、.3.9 Critical temperature Not applicable. 3.3.10 Critical pressure Not applicable. 3.3.11 Physical hardness The hardness of solid sodium carbonate is given as 1 to 2 on the Mohs scale of hardness. 3.4 Chemical properties Sodium carbonate reacts exothermically with acids with the formation of carbon
36、dioxide. Sodium carbonate is slightly hygroscopic and dissolution in water is an exothermic reaction. 4 Purity criteria 4.1 General This European Standard specifies the minimum purity requirements for sodium carbonate used for the treatment of water intended for human consumption. Limits are given f
37、or impurities commonly present in the product. Depending on the raw material and the manufacturing process other impurities may be present and, if so, this shall be notified to the user and when necessary to relevant authorities. NOTE Users of this product should check the national regulations in or
38、der to clarify whether it is of appropriate purity for treatment of water intended for human consumption, taking into account raw water quality, required dosage, contents of other impurities and additives used in the products not stated in this product standard. Limits have been given for impurities
39、 and chemical parameters where these are likely to be present in significant quantities from the current 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 t
40、he user. 4.2 Composition of commercial product The product shall contain not less than a mass fraction of 99 % of Na2CO3. 4.3 Impurities and main by-products The product shall conform to the requirements specified in Table 1. The concentration limits refer to pure Na2CO3. DIN EN 897:2013-02 EN 897:2
41、012 (E) 8 Table 1 Impurities Impurity Limit in mg/kg of Na2CO3Iron(II) 1)max. 20 Insoluble matters 2)max. 2001) Iron(II) can cause organoleptic problems. 2) Indicate the presence of foreign matter. 4.4 Chemical parameters The product shall conform to the requirements specified in Table 2. Table 2 Ch
42、emical parameters Parameter Limit in mg/kg of Na2CO32 2 2 0,1 2 2 Arsenic (As) max. Cadmium (Cd) max. Chromium (Cr) max. Mercury (Hg) max. Nickel (Ni) max. Lead (Pb) max. NOTE Antimony, selenium, cyanides, pesticides and polycyclic aromatic hydrocarbons are not relevant in sodium carbonate. For para
43、metric values of sodium carbonate on trace metal content in drinking water, see 1. 5 Test methods 5.1 Sampling Prepare the laboratory sample (s) required by the relevant procedure described in ISO 8213, observe the recommendations of ISO 3165 and also take into account ISO 6206. DIN EN 897:2013-02 E
44、N 897:2012 (E) 9 5.2 Analyses 5.2.1 Main product The mass fraction in % of Na2CO3shall be determined by titration of the total alkalinity with a standard volumetric acid solution in accordance with ISO 740. 5.2.2 Impurities 5.2.2.1 Iron The iron content shall be determined by a spectrometric method
45、with 1,10-phenanthroline in accordance with ISO 2460 replacing sodium bicarbonate by sodium carbonate. 5.2.2.2 Insoluble matters The mass fraction in % of the insoluble matter in water shall be determined at 50 C in accordance with ISO 746. 5.2.3 Chemical parameters 5.2.3.1 Principle The elements ar
46、senic, cadmium, chromium, lead and nickel are determined by inductively coupled plasma optical emission spectrometry. Mercury is determined by cold vapour atomic absorption spectrometry. 5.2.3.2 Arsenic The arsenic content shall be determined by inductively coupled plasma optical emission spectromet
47、ry (ICP/OES) (see B.1). 5.2.3.3 Cadmium The cadmium content shall be determined by inductively coupled plasma optical emission spectrometry (ICP/OES) (see B.1). 5.2.3.4 Chromium The chromium content shall be determined by inductively coupled plasma optical emission spectrometry (ICP/OES) (see B.1).
48、5.2.3.5 Nickel The nickel content shall be determined by inductively coupled plasma optical emission spectrometry (ICP/OES) (see B.1). DIN EN 897:2013-02 EN 897:2012 (E) 10 5.2.3.6 Lead The lead content shall be determined by inductively coupled plasma optical emission spectrometry (ICP/OES) (see B.
49、1). 5.2.3.7 Mercury The mercury content shall be determined by cold vapour atomic absorption spectrometry in accordance with EN ISO 12846 (see B.2). 6 Labelling Transportation Storage 6.1 Means of delivery Sodium carbonate can be delivered in bulk, bulk bags or in bags. In order that the purity of the products is not affected, the means of delivery shall not have been used previously for any different product or it shall have been specially cleaned and prepared before use. 6.2
