1、May 2015 Translation by DIN-Sprachendienst.English price group 13No 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).ICS 71
2、.100.80!%Bq“2315878www.din.deDDIN EN 12926Chemicals used for treatment of water intended for humanconsumption Sodium peroxodisulfate;English version EN 12926:2015,English translation of DIN EN 12926:2015-05Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch Natriumperoxodisulfat;Englis
3、che Fassung EN 12926:2015,Englische bersetzung von DIN EN 12926:2015-05Produits chimiques utiliss pour le traitement de leau destine la consommationhumaine Peroxodisulfate de sodium;Version anglaise EN 12926:2015,Traduction anglaise de DIN EN 12926:2015-05SupersedesDIN EN 12926:2008-12www.beuth.deIn
4、 case of doubt, the German-language original shall be considered authoritative.Document comprises 26 pages 04.15 DIN EN 12926:2015-05 2 A comma is used as the decimal marker. National foreword This document (EN 12926:2015) has been prepared by Technical Committee CEN/TC 164 “Water supply” (Secretari
5、at: AFNOR, France). The responsible German body involved in its preparation was the DIN-Normenausschuss Wasserwesen (DIN Standards Committee Water Practice), Joint Working Committee NA 119-07-04-01 UA Aufbereitungsstoffe und -anlagen. Users of this standard are advised of the reservations stated in
6、the Introduction of the European Standard and should note that national regulations exist in Germany dealing with water for human consumption, in particular the Trinkwasserverordnung (TrinkwV 2001) (German Drinking Water Ordinance). The DIN Standards corresponding to the International Standards refe
7、rred to in this document are as follows, 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 12926:2008-12 as follows: a) the risk and safety labelling (Sub
8、clause 6.2) has been updated in accordance with EU Regulation 1272/2008. b) normative references have been updated. Previous editions DIN EN 12926: 2000-12, 2008-12 National Annex NA (informative) Bibliography DIN ISO 3696, Water for analytical laboratory use Specification and test methods Verordnun
9、g ber die Qualitt von Wasser fr den menschlichen Gebrauch (Trinkwasserverordnung TrinkwV 2001) (German Drinking Water Ordinance), as of 02 August 2013 (BGBI. (German Federal Law Gazette) I, 2013, no. 46, pp. 2977-3004), as amended by Article 4, Paragraph 22 of the Act of 07 August 2013 (BGBI. I, no.
10、 48, pp. 3154-3211) EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12926 March 2015 ICS 71.100.80 Supersedes EN 12926:2008English Version Chemicals used for treatment of water intended for human consumption - Sodium peroxodisulfate Produits chimiques pour le traitement de leau destine la conso
11、mmation humaine - Peroxodisulfate de sodium Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Natriumperoxodisulfat This European Standard was approved by CEN on 20 December 2014. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditio
12、ns 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 Standard exists in
13、 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 national standard
14、s 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, Slovakia, Sloven
15、ia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved w
16、orldwide for CEN national Members. Ref. No. EN 12926:2015 EEN 12926:2015 (E) 2 Contents Page Foreword 4 Introduction .5 1 Scope 6 2 Normative references 6 3 Description .6 3.1 Identification .6 3.1.1 Chemical name .6 3.1.2 Synonym or common name 6 3.1.3 Relative molecular mass .6 3.1.4 Empirical for
17、mula.6 3.1.5 Chemical formula .6 3.1.6 CAS Registry Number 7 3.1.7 EINECS reference .7 3.2 Commercial form .7 3.3 Physical properties 7 3.3.1 Appearance and odour 7 3.3.2 Density 7 3.3.3 Solubility in water 7 3.3.4 Vapour pressure 7 3.3.5 Boiling point at 100 kPa .7 3.3.6 Melting point .7 3.3.7 Spec
18、ific heat .7 3.3.8 Viscosity (dynamic) .8 3.3.9 Critical temperature .8 3.3.10 Critical pressure.8 3.3.11 Physical hardness .8 3.4 Chemical properties 8 4 Purity criteria 8 4.1 General 8 4.2 Composition of commercial product .8 4.3 Impurities and main by-products .8 4.4 Chemical parameters 8 5 Test
19、methods 9 5.1 Sampling .9 5.2 Analysis 9 5.2.1 General 9 5.2.2 Determination of sodium peroxodisulfate (main product) 9 5.2.3 Impurities . 11 5.2.4 Chemical parameters . 11 6 Labelling Transportation Storage . 13 6.1 Means of delivery 13 6.2 Labelling according to the EU Legislation 14 6.3 Transport
20、ation regulations and labelling . 14 6.4 Marking 14 6.5 Storage . 14 6.5.1 General . 14 6.5.2 Long term stability 14 6.5.3 Storage incompatibilities . 15 DINEN 12926:2015-05EN 12926:2015(E)3 Annex A (informative) General information on sodium peroxodisulfate 16 A.1 Origin 16 A.1.1 Raw materials 16 A
21、.1.2 Manufacturing process . 16 A.2 Use 16 A.2.1 Function 16 A.2.2 Form in which it is used 16 A.2.3 Treatment dose 16 A.2.4 Means of application . 16 A.2.5 Secondary effects 16 A.2.6 Removal of excess product 16 Annex B (normative) General rules relating to safety . 17 B.1 Rules for safe handling a
22、nd use 17 B.2 Emergency procedures . 17 B.2.1 First aid . 17 B.2.2 Spillage . 17 B.2.3 Fire 17 Annex C (normative) Determination of arsenic, antimony and selenium (atomic absorption spectrometry hydride technique) 18 C.1 General principle . 18 C.2 Interferences 18 C.3 Reagents. 18 C.4 Apparatus . 20
23、 C.5 Procedure . 21 C.5.1 Preparation of the apparatus . 21 C.5.2 Preparation of calibration solutions 22 C.5.3 Preparation of test solutions and standard solutions . 22 C.5.4 Determination of arsenic with sodium borohydride 22 C.5.5 Determination of selenium with sodium borohydride . 22 C.5.6 Deter
24、mination of antimony with sodium borohydride . 23 C.6 Calculation . 23 Bibliography 24 DIN EN 12926:2015-05 EN 12926:2015 (E) 4 Foreword This document (EN 12926:2015) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFNOR. This European Standard
25、 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2015, and conflicting national standards shall be withdrawn at the latest by September 2015. This document supersedes EN 12926:2008. Attention is drawn to the p
26、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. Significant technical difference between this edition and EN 12926:2008 is as follows: a) deletion of reference t
27、o EU Directive 67/548/EEC of June 27, 1967 in order to take into account the latest Regulation in force (see 2); b) 6.2 updating of risk and safety labelling according to EU Regulation 2 and its latest Adaptations to Technical Progress). According to the CEN-CENELEC Internal Regulations, the nationa
28、l standards organizations 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, Hungary, Iceland, Ireland, Italy, Latvia, Lithua
29、nia, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DINEN 12926:2015-05EN 12926:2015 (E) 5 Introduction In respect of potential adverse effects on the quality of water intended for human consumption, c
30、aused 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 adoption of verifiable European criteria,
31、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 EFTA. The use of the product covered by thi
32、s European Standard is subject to regulation or control by National Authorities. DIN EN 12926:2015-05 EN 12926:2015 (E) 6 1 Scope This European Standard is applicable to sodium peroxodisulfate used for treatment of water intended for human consumption. It describes the characteristics of sodium pero
33、xodisulfate and specifies the requirements and the corresponding test methods for sodium peroxodisulfate. 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
34、 application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies EN 1233, Water quality - Determination of chromium - Atomic absorption spectrometric methods EN ISO 12846, Water quality - Dete
35、rmination of mercury - Method using atomic absorption spectrometry (AAS) with and without enrichment (ISO 12846) EN ISO 3696, Water for analytical laboratory use - Specification and test methods (ISO 3696) ISO 3165, Sampling of chemical products for industrial use Safety in sampling ISO 6206, Chemic
36、al 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 ISO 8288:1986, Water quality Determination of cobalt, nickel, copper, zinc, cadmium and lead Fla
37、me atomic absorption spectrometric methods 3 Description 3.1 Identification 3.1.1 Chemical name Sodium peroxodisulfate. 3.1.2 Synonym or common name Sodium persulfate. 3.1.3 Relative molecular mass 238,11. 3.1.4 Empirical formula Na2S2O8. 3.1.5 Chemical formula Na2S2O8. DIN EN 12926:2015-05 EN 12926
38、:2015 (E) 7 3.1.6 CAS Registry Number 1)7775-27-1. 3.1.7 EINECS reference 2)231-892-1. 3.2 Commercial form Sodium peroxodisulfate is available as a crystalline powder. 3.3 Physical properties 3.3.1 Appearance and odour The product is white, odourless, crystalline free-flowing salt. 3.3.2 Density The
39、 bulk density of the product is approximately 1,15 g/cm3. 3.3.3 Solubility in water The solubility of the product in water is approximately: 515 g/l at 10 C; 545 g/l at 20 C; 605 g/l at 40 C; 680 g/l at 60 C. 3.3.4 Vapour pressure Not applicable. 3.3.5 Boiling point at 100 kPa 3)Not applicable. 3.3.
40、6 Melting point The product decomposes above 65 C. 3.3.7 Specific heat Not known. 1)Chemical Abstracts Service Registry Number 2)European Inventory of Existing Commercial Chemical Substances 3)100 kPa = 1 bar. DIN EN 12926:2015-05 EN 12926:2015 (E) 8 3.3.8 Viscosity (dynamic) Not applicable. 3.3.9 C
41、ritical temperature Not applicable. 3.3.10 Critical pressure Not applicable. 3.3.11 Physical hardness Not applicable. 3.4 Chemical properties Sodium peroxodisulfate is a powerful oxidizing agent. Sodium peroxodisulfate also serves as a source of radicals. The standard reduction potential Eois + 2,06
42、 V at 25 C for the following reaction: +2- - 2-28 4S O 2e 2SO 4 Purity criteria 4.1 General This European Standard specifies the minimum purity requirements for sodium peroxodisulfate used for the treatment of water intended for human consumption. Limits are given for impurities commonly present in
43、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. Users of this product should check the national regulations in order to clarify whether it is of appropr
44、iate 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 product not stated in the product standard. Limits have been given for impurities and chemicals parameters where these are
45、 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 the user. 4.2 Composition of commercial p
46、roduct The commercial product shall contain not less than 99 mass fraction percent of Na2S2O8. 4.3 Impurities and main by-products Sodium peroxodisulfate does not contain significant concentrations of impurities or by-products. 4.4 Chemical parameters NOTE For the purpose of this standard, “chemical
47、 parameters” are those defined in the EU Directive 98/83/EC of 3 November 1998 (see 1). DIN EN 12926:2015-05 EN 12926:2015 (E) 9 The content of chemical parameters shall conform to the requirements specified in Table 1. Table 1 Chemical parameters Limit in mg/kg of Na2S2O8Parameter Type 1 Type 2 Ars
48、enic (As) max. 0,05 5 Cadmium (Cd) max. 0,05 2 Chromium (Cr) max. 0,5 5 Mercury (Hg) max. 2 2 Nickel (Ni) max. 0,2 5 Lead (Pb) max. 0,05 5 Antimony (Sb) max. 5 10 Selenium (Se) max. 5 10 NOTE Cyanide, which does not exist in a strong oxidizing medium such as sodium peroxodisulfate, is not a relevant chemical parameter. Pesticides and polycyclic aromatic hydrocarbons are not by-products of the manufacturing process. 5 Test methods 5.1 Sampling Observe the recommendations of ISO 3165 and take acc
