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!$*K“1950740www.din.deDDIN EN 898Chemicals used for treatment of water intended for humanconsumption Sodium hydrogen carbonate;English version EN 898:2012,English translation of DIN EN 898:2013-02Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch Natriumhydrogencarbonat;En
3、glische Fassung EN 898:2012,Englische bersetzung von DIN EN 898:2013-02Produits chimiques utiliss pour le traitement de leau destine la consommationhumaine Hydrognocarbonate de sodium;Version anglaise EN 898:2012,Traduction anglaise de DIN EN 898:2013-02SupersedesDIN EN 898:2005-09www.beuth.deIn cas
4、e of doubt, the German-language original shall be considered authoritative.Document comprises 21 pages 02.13 DIN EN 898:2013-02 2 A comma is used as the decimal marker. National foreword This document (EN 898:2012) has been prepared by Technical Committee CEN/TC 164 “Water supply” (Secretariat: AFNO
5、R, France). The responsible 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 Standa
6、rd and should note that national 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,
7、 whereby EN ISO Standards are 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 898:2005-09 as follows: a) the reference to Directive 67/548/EEC relating to the classification, packin
8、g and labelling of dangerous substances has been replaced by the reference to Regulation EC No 1272/2008. Previous editions DIN EN 898: 1998-04, 2005-09 National Annex NA (informative) Bibliography DIN ISO 3696, Water for analytical laboratory use Specification and test methods Verordnung ber die Qu
9、alitt 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 Act of 22 December 2011 (BGBI. I p. 3044)*)*)Obtainable from: Bundesministerium der Justiz (Ger
10、man Federal Ministry of Justice) (Internet: http:/www.gesetze-im-internet.de). EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 898 November 2012 ICS 71.100.80 Supersedes EN 898:2005English Version Chemicals used for treatment of water intended for human consumption - Sodium hydrogen carbonate P
11、roduits chimiques utiliss pour le traitement de leau destine la consommation humaine - Hydrognocarbonate de sodium Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Natriumhydrogencarbonat This European Standard was approved by CEN on 16 September 2012. CEN members are bound to com
12、ply 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 such national standards may be obtained on application to the CEN-CENELE
13、C 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 own language and notified to the CEN-CENELEC Management Centre has the s
14、ame 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, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembour
15、g, 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 NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All
16、rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 898:2012: EEN 898:2012 (E) 2 Contents Page Foreword 3Introduction .41 Scope 52 Normative references 53 Description .54 Purity criteria 75 Test methods 86 Labelling Transportation Storage . 10
17、Annex A (informative) General information on sodium hydrogen carbonate 11Annex B (normative) Analytical methods 13Bibliography . 19DIN EN 898:2013-02 EN 898:2012 (E) 3 Foreword This document (EN 898:2012) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is
18、 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, and conflicting national standards shall be withdrawn at the latest by May 2013. Attention is drawn to the possibility tha
19、t 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 EN 898:2005. Significant technical differences between this edition and EN 898:2005 are as follows: a)
20、 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 (see 1). According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to i
21、mplement this European Standard: 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, Roma
22、nia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 898:2013-02 EN 898:2012 (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 Europ
23、ean 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 adoption of verifiable European criteria, existing national regulations concerning the use and/or the character
24、istics 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 EFTA. The use of the product covered by this European Standard is subject to regulation or control by National A
25、uthorities. DIN EN 898:2013-02 EN 898:2012 (E) 5 1 Scope This European Standard is applicable to sodium hydrogen carbonate used for the treatment of water intended for human consumption. It describes the characteristics and specifies the requirements and the corresponding test methods for sodium hyd
26、rogen carbonate. It gives information on its use in water treatment. 2 Normative references The following 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 reference
27、s, the latest edition of the referenced document (including any amendments) applies. EN ISO 3696, Water for analytical laboratory use Specification and test methods (ISO 3696) EN ISO 12846:2012, Water quality Determination of mercury Method using atomic absorption spectrometry (AAS) with and without
28、 enrichment (ISO 12846:2012) ISO 746, Sodium carbonate for industrial use Determination of matter insoluble in water at 50 degrees C ISO 2199, Sodium hydrogen carbonate for industrial use Determination of sodium hydrogen carbonate content Titrimetric method ISO 2460, Sodium hydrogen carbonate for in
29、dustrial use Determination of iron content 1,10-Phenanthroline photometric method ISO 3165, Sampling of chemical products for industrial use Safety in sampling ISO 6206, Chemical products for industrial use Sampling Vocabulary ISO 8213, Chemical products for industrial use Sampling techniques Solid
30、chemical products in the form of particles varying from powders to coarse lumps 3 Description 3.1 Identification 3.1.1 Chemical name Sodium hydrogen carbonate. 3.1.2 Synonym or common name Sodium bicarbonate, bicarbonate of soda, baking soda. 3.1.3 Relative molecular mass 84,01. 3.1.4 Empirical form
31、ula NaHCO3. DIN EN 898:2013-02 EN 898:2012 (E) 6 3.1.5 Chemical formula NaHCO3. 3.1.6 CAS Registry Number1)144-55-8. 3.1.7 EINECS reference2)205-633-8. 3.2 Commercial forms The product is available as powder or crystals. 3.3 Physical properties 3.3.1 Appearance The product is a white powder or cryst
32、als, slightly hygroscopic. 3.3.2 Density The density of this product is 2,2 g/cm3. The bulk density is ranging from 0,5 kg/dm3to 1,1 kg/dm3. 3.3.3 Solubility in water The product is soluble at 95 g/l at 20 C. 3.3.4 Vapour pressure Not applicable. 3.3.5 Boiling point at 100 kPa3)Not applicable. 3.3.6
33、 Melting point Not applicable .The product decomposes at 50 C. 3.3.7 Specific heat 1,197 J/(kg K). 1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. 3) 100 kPa = 1 bar. DIN EN 898:2013-02 EN 898:2012 (E) 7 3.3.8 Viscosity (dynamic) Not a
34、pplicable. 3.3.9 Critical temperature Not applicable. 3.3.10 Critical pressure Not applicable. 3.3.11 Physical hardness The hardness of solid sodium hydrogen carbonate is given as 1,5 to 2 on the Mohs scale of hardness. 3.4 Chemical properties Sodium hydrogen carbonate as specified is technical wate
35、r-free NaHCO3. Sodium hydrogen carbonate reacts exothermically with acids with formation of carbon dioxide. 4 Purity criteria 4.1 General This European Standard specifies the minimum purity requirements for sodium hydrogen carbonate used for the treatment of water intended for human consumption. Lim
36、its are given for 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 re
37、gulations in order 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
38、 for impurities 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 b
39、e notified to the user. 4.2 Composition of commercial product The product shall contain not less than a mass fraction of 98,5 % of NaHCO3. 4.3 Impurities and main by-products The product shall conform to the requirements specified in Table 1. The concentration limits refer to pure NaHCO3. DIN EN 898
40、:2013-02 EN 898:2012 (E) 8 Table 1 Impurities Impurity Limit in mg/kg of NaHCO3Iron (II) 1)max. 5 Insoluble matters 2)max. 200 1) 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 T
41、able 2. Table 2 Chemical parameters Parameter Limit in mg/kg of NaHCO32 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 h
42、ydrogen carbonate. For parametric values of sodium hydrogen 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 with ISO 8213, observe the recommendations of ISO 3165 and also take ac
43、count of ISO 6206. DIN EN 898:2013-02 EN 898:2012 (E) 9 5.2 Analyses 5.2.1 Main product The mass fraction in % of NaHCO3shall be determined by titration with a standard volumetric acid solution in accordance with ISO 2199. 5.2.2 Impurities 5.2.2.1 Iron The iron content shall be determined by a spect
44、rometric method with 1,10-phenanthroline in accordance with ISO 2460. 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 replacing sodium carbonate by sodium hydrogen carbonate. 5.2.3 Chemical parameters 5.2.3.1 Pr
45、inciple The elements arsenic, 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 opti
46、cal emission spectrometry (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 spectrometr
47、y (ICP/OES) (see B.1). 5.2.3.5 Nickel The nickel content shall be determined by inductively coupled plasma optical emission spectrometry (ICP/OES) (see B.1). 5.2.3.6 Lead The lead content shall be determined by inductively coupled plasma optical emission spectrometry (ICP/OES) (see B.1). 5.2.3.7 Mer
48、cury The mercury content shall be determined by cold vapour atomic absorption spectrometry in accordance with EN ISO 12846 (see B.2). DIN EN 898:2013-02 EN 898:2012 (E) 10 6 Labelling Transportation Storage 6.1 Means of delivery Sodium hydrogen 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 ha
