1、August 2010 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).ICS
2、 71.100.80!$jP“1714504www.din.deDDIN EN 1278Chemicals used for treatment of water intended for humanconsumption OzoneEnglish translation of DIN EN 1278:2010-08Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch OzonEnglische bersetzung von DIN EN 1278:2010-08Produits chimiques utiliss
3、pour le traitement de leau destine la consommationhumaine OzoneTraduction anglaise de DIN EN 1278:2010-08SupersedesDIN EN 1278:1999-01www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.2208.10 DIN EN 1278:2010-08 A comma is used as th
4、e decimal marker. National foreword This standard has been prepared by Technical Committee CEN/TC 164 “Water supply” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was the Normenausschuss Wasserwesen (Water Practice Standards Committee), Working Committee NA 11
5、9-04-02 AA Wasseraufbereitung. Users of this standard are advised of the reservations stated in the Introduction of the European Standard and should note that national regulations exist in Germany dealing with water for human consumption, in particular the Trinkwasserverordnung (TrinkwV2001) (German
6、 Drinking Water Ordinance). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. DIN shall not be held responsible for identifying any or all such patent rights. The DIN Standard corresponding to the International Standard referred to
7、in this document is as follows: EN ISO 3696 DIN ISO 3696 Amendments This standard differs from DIN EN 1278:1999-01 as follows: a) General purity criteria have been given in more detail. b) Reference to the Drinking Water Directive has been updated. c) A note relating to the classification of dangero
8、us substances has been included. d) The bibliography has been updated. Previous editions DIN EN 1278: 1999-01 National Annex NA (informative) Bibliography DIN ISO 3696, Water for analytical laboratory use Specification and test methods Verordnung zur Novellierung der Trinkwasserverordnung (German Re
9、gulation amending the German Drinking Water Ordinance), as of 21 May 2001, BGBl. (German Federal Law Gazette) I, No. 24, pp. 959-9801)1)Recorded in the DITR database of DIN Software GmbH, obtainable from Beuth Verlag GmbH, 10772 Berlin, Germany. 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN
10、 1278 April 2010 ICS 71.100.80 Supersedes EN 1278:1998English Version Chemicals used for treatment of water intended for human consumption - Ozone Produits chimiques utiliss pour le traitement de leau destine la consommation humaine - Ozone Produkte zur Aufbereitung von Wasser fr den menschlichen Ge
11、brauch - Ozon This European Standard was approved by CEN on 28 February 2010. 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 bibl
12、iographical references concerning such national standards may be obtained on application to the CEN 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
13、 of a CEN member into its own language and notified to the CEN 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, France, Germany, Greece, Hungary, Ic
14、eland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Aven
15、ue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1278:2010: EEN 1278:2010 (E) 2 Contents Page Foreword 3 Introduction .4 1 Scope 5 2 Normative references 5 3 Description .5 3.1 Identification .5 3.
16、2 Commercial form .5 3.3 Physical properties 6 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 9 5 Test methods 9 5.1 Sampling .9 5.2 Analyses .9 6 Labelling - Transportation Storage 1
17、1 6.1 Means of delivery 11 6.2 Risk and safety labelling according to the EU Directives . 12 6.3 Transportation regulations and labelling . 12 6.4 Marking 12 6.5 Stability 12 Annex A (informative) General information on ozone 13 A.1 Origin . 13 A.2 Use . 14 A.3 Operational control methods . 15 Annex
18、 B (normative) General rules relating to safety 19 B.1 Rules for safe handling and use . 19 B.2 Emergency procedures 19 Bibliography . 20 DIN EN 1278:2010-08 EN 1278:2010 (E) 3 Foreword This document (EN 1278:2010) has been prepared by Technical Committee CEN/TC 164 “Water Supply”, the secretariat o
19、f 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 October 2010, and conflicting national standards shall be withdrawn at the latest by October 2010. Attention is drawn to t
20、he 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 document supersedes EN 1278:1998. According to the CEN/CENELEC Internal Regulations, the national standa
21、rds organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Po
22、land, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Differences between this edition and EN 1278:1998 are editorial to harmonize the text with other standards in this series. DIN EN 1278:2010-08 EN 1278:2010 (E) 4 Introduction In respect of potential adver
23、se effects on the quality of water intended for human consumption, caused by the product covered by this Standard: 1) this 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; 2) it should be noted that, while await
24、ing 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 the standard does not confer or imply acceptance or approval of the product in any of the Member States of the EU or EFT
25、A. The use of the product covered by this European Standard is subject to regulation or control by National Authorities. DIN EN 1278:2010-08 EN 1278:2010 (E) 5 1 Scope This European Standard is applicable to ozone used for treatment of water intended for human consumption. It describes the character
26、istics of ozone and specifies a test method for determining the ozone concentration in other gases. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the late
27、st edition of the referenced document (including any amendments) applies. EN ISO 3696, Water for analytical laboratory use Specification and test method (ISO 3696:1987) 3 Description 3.1 Identification 3.1.1 chemical name ozone 3.1.2 synonym or common name none (has sometimes been called improperly
28、“allotropic oxygen“) 3.1.3 relative molecular mass 48 3.1.4 empirical formula O3 3.1.5 chemical formula O33.1.6 CAS Registry Number 1)10028-15-6 3.1.7 EINECS reference 2) Not applicable 3.2 Commercial form Ozone is generated on or near the site of use. 1) Chemical Abstracts Service Registry Number 2
29、) European Inventory of Existing Commercial Chemical Substances DIN EN 1278:2010-08 EN 1278:2010 (E) 6 3.3 Physical properties 3.3.1 Appearance Bluish gas, the liquid is dark blue. NOTE A weak absorption in the visual range between 435 nm and 475 nm. 3.3.2 Density Gas : 2,144 kg/m3at NTP (Normal Tem
30、perature Pressure, 273 K and 101,3 kPa); Liquid : 1,574 g/cm3at - 183 C; Solid : 1,728 g/cm3. 3.3.3 The gas-liquid partition coefficient In pure water, the partition coefficient values (S) expressed in grams per cubic meter water per (grams per cubic meter) gas at 101,3 kPa are given in table 1. Tab
31、le 1 The gas-liquid partition coefficient between water and gas phase Temperature of water C Solubility S, in gmHOg m gas/3230 0,645 0,510 0,39 15 0,3120 0,2425 0,19 30 0,1535 0,12NOTE 1 Recent surveys of literature data are given in Bibliography. See 2, 3 and 4. NOTE 2 S is a ratio, not an absolute
32、 concentration. 3.3.4 Vapour pressure The vapour pressure of ozone depending on temperature is given in Table 2. DIN EN 1278:2010-08 EN 1278:2010 (E) 7 Table 2 Vapour pressure Temperature Vapour pressure C kPa- 183 0,0147 - 180 0,028 - 170 0,188 - 160 0,897 - 150 3,306 - 140 9,892 - 130 25,331 - 120
33、 56,928 - 110 115,322 - 100 2 139,079 3.3.5 Boiling point at 100 kPa 3) - 112 C. NOTE : Vaporization heat : 681 kJ/m3at NTP. 3.3.6 Melting point - 196 C. 3.3.7 Specific heat (liquid) Not applicable. 3.3.8 Viscosity (dynamic) 0,004 2 Pa.s at 195 C; 0,0015 5 Pa.s at 183 C. 3.3.9 Critical temperature -
34、 12,1 C. 3.3.10 Critical pressure 5 460 kPa. 3.3.11 Physical hardness Not applicable. 3) 100 kPa = 1 bar DIN EN 1278:2010-08 EN 1278:2010 (E) 8 3.4 Chemical properties Ozone is a powerful oxidant. The standard redox potentials (25 C) are: (EoH-values in volts): O3+ 2H+ 2e- O2+ H2O EoH= 2,07 V (1) O3
35、+ H2O + 2e- O2+ 2OH-EoH= 1,24 V (2) OH + H+ e- H2O EoH= 2,42 V(calculated value) (3) If the pH increases by one unit, the EH -values shall decrease by 30 mV per electron transferred. At 100 kPa and 25 C and pH = 7 the EH-values, versus the normal hydrogen electrode, become: O3(1) = 1,66 V; O3(2) = 0
36、,82 V; OH(3) = 2,21V. In water treatment most of the direct reactions of ozone are dipolar cyclo-additions and electrophilic substitution reactions. Moreover ozone, in water, can generate radicals such as OH : (O3 + H2O 2 OH + O2). The OH radical is a strong general oxidant. 4 Purity criteria 4.1 Ge
37、neral This European Standard specifies the minimum purity requirements for Ozone 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 manufacturing process other impurities may be presen
38、t 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 order to clarify whether it is of appropriate purity for treatment of water intended for human consumption, taking into account raw water q
39、uality, 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 chemicals parameters where these are likely to be present in significant quantities from the current production process and raw mater
40、ials. If the production process or raw materials lead to significant quantities of impurities, by-products or additives being present, this shall be notified to the user. 4.2 Composition of commercial product Ozone is obtainable in air, oxygen or air enriched in oxygen. Typical concentrations obtain
41、able in air are in the range of 15 g/m3to 45 g/m3(NTP) and, in oxygen 40 g/m3to 200 g/m3(NTP). The concentration (in grams per cubic metre NTP) at the nominal operating condition of the generators shall be specified in the tendering documents. 4.3 Impurities and main by-products See A.3.2. DIN EN 12
42、78:2010-08 EN 1278:2010 (E) 9 4.4 Chemical parameters NOTE For the purpose of this standard “chemical parameters“ are those defined in the 98/83/EC: Council Directive of 3 November 1998 on the quality of water intended for human consumption. (see 1). None of the chemical parameters according to the
43、directive 98/83/EC are found in the gaseous ozone phase. Pesticides and polycyclic aromatic hydrocarbons are not by-products of the ozone manufacturing processes. 5 Test methods 5.1 Sampling Ozone generation is usually based on a continuous process gas flow mode positive pressure. Sampling of a volu
44、me is to be controlled with a totalizing volumetric flow metre, the volumes being expressed at Normal Temperature and Pressure (NTP). In continuous monitoring methods the gas exit shall be open to ambient air or the gas pressure shall be controlled and the results corrected for effects of pressure.
45、Sampling lines shall be in stainless steel (see table A.1) or in polyfluorocarbone material resistant to ozone. The transfer of the gas from the sampling point to the analyzer shall be kept shorter than 1 min. Expression of concentrations : concentration of ozone in a gas in g/m3(NTP), or kg/m3(NTP)
46、, and for traces in cm3/m3(equivalent to ppm as volume fraction). NOTE 1 1 g/m3(NTP) equals 6104,466 (volume fraction) and 0,069 9 % (mass fraction) in oxygen or 0,077 3 % (mass fraction) in air. NOTE 2 At conventional concentrations of about 20 g/m3(NTP), the effect of difference in gas densities b
47、etween ozone and oxygen-nitrogen is negligible. This is not the case when higher ozone concentrations are generated i.e. in oxygen. 5.2 Analyses 5.2.1 General The present method concerns the determination of ozone in air, oxygen or other process gases. The method is directly applicable for ozone con
48、centrations in the range of 1 g/m3to 200 g/m3(NTP). 5.2.2 Principle Direct iodometric titration. 5.2.3 Reagents All reagents shall be of a recognized analytical grade and the water used shall conform to grade 2 in accordance with EN ISO 3696. 5.2.3.1 Potassium iodide (KI) buffered solution. Potassiu
49、m iodide (KI) solution at 20 g/l with sodium hydrogen phoshate (Na2HPO4.2 H2O) solution at 7,3 g/l and potassium dihydrogen phosphate (KH2PO4) solution at 3,5 g/l. 5.2.3.2 Sodium thiosulfate : standard volumetric, solution c(Na2S2O3) = 0,1 mol/l. DIN EN 1278:2010-08 EN 1278:2010 (E) 10 5.2.3.3 Sulfuric acid, solution at 9 mol/l.5.2.3.4 Potassium iodate (KIO3) powdered. 5.2.3.5 Potassium iodide (KI) crystalline. 5.2.3.6 Hydrochloric acid standard volumetric solution c(HCl) = 0,1 mol/l or sulfuric acid c(H2SO4) =0,05 mo
