BS EN 1019-2005 Chemicals used for treatment of water intended for human consumption - Sulfur dioxide《人类生活用水处理用化学试剂 二氧化硫》.pdf

1、BS EN 1019:2005ICS 13.060.20; 71.100.80NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDChemicals used fortreatment of waterintended for humanconsumption SulfurdioxideLicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 14/01/2009 01:55, Uncontrolled Copy, (c)

2、BSIThis British Standard was published under theauthority of the StandardsPolicy and StrategyCommittee on 31 October2008 BSI 2008ISBN 978 0 580 55208 3Amendments/corrigenda issued since publicationDate CommentsBS EN 1019:2005National forewordThis British Standard is the UK implementation of . It sup

3、ersedes BSEN 1019:1996 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee CII/59, Chemicals for drinking water treatment.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to i

4、nclude all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 14/01/2009 01:55, Uncontrolled Copy, (c) BSIBS EN 1019:2005EUROPE

5、AN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1019 June 2005 ICS 71.100.80 Supersedes EN 1019:1995 English version Chemicals used for treatment of water intended for human consumption - Sulfur dioxide Produits chimiques pour le traitement de leau destine la consommation humaine - Dioxyde de soufre

6、Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Schwefeldioxid This European Standard was approved by CEN on 25 April 2005. 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 n

7、ational standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in

8、 any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Fi

9、nland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE

10、FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1019:2005: ELicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 14/01/2009 01:55, Uncontrolled Copy, (c) BSIB

11、S EN 1019:2005EN 1019:2005 (E) 2 Contents Page Foreword 3 Introduction4 1 Scope .5 2 Normative references .5 3 Description 5 4 Purity criteria.7 5 Test methods.8 6 Labelling Transportation Storage9 Annex A (informative) General information on sulfur dioxide 12 Annex B (normative) General rules relat

12、ing to safety13 Bibliography.14 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 14/01/2009 01:55, Uncontrolled Copy, (c) BSIBS EN 1019:2005EN 1019:2005 (E) 3 Foreword This document (EN 1019:2005) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is h

13、eld 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 December 2005, and conflicting national standards shall be withdrawn at the latest by December 2005. This document supersedes EN 1019:

14、1995. Significant technical differences between this edition and EN 1019:1995 are as follows: deletion of the reference to EU Directive 80/778/EEC of July, 15 1980 in order to take into account the latest Directive. (see 1). According to the CEN/CENELEC Internal Regulations, the national standards o

15、rganizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia

16、, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 14/01/2009 01:55, Uncontrolled Copy, (c) BSIBS EN 1019:2005EN 1019:2005 (E) 4 Introduction In respect of potential adverse effects on the quality of water intended for human consumption,

17、 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 adoption of verifiable European criter

18、ia, 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

19、 this document is subject to regulation or control by National Authorities. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 14/01/2009 01:55, Uncontrolled Copy, (c) BSIBS EN 1019:2005EN 1019:2005 (E) 5 1 Scope This European Standard is applicable to sulfur dioxide used for treatment of water

20、intended for human consumption. It describes the characteristics and specifies the requirements and the corresponding test methods for sulfur dioxide. It gives information on its use in water treatment. It also determines the rules relating to safe handling and use (see annex B). 2 Normative referen

21、ces The following referenced documents are indispensable for the application of this document. 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

22、use Specification and test methods (ISO 3696:1987) ISO 760, Determination of water-Karl Fischer method. (General method) ISO 3165, Sampling of chemical products for industrial use Safety in sampling ISO 6206, Chemical products for industrial use Sampling Vocabulary 3 Description 3.1 Identification 3

23、.1.1 Chemical name Sulfur dioxide. 3.1.2 Synonym or common name Sulfurous acid anhydride. 3.1.3 Relative molecular mass 64. 3.1.4 Empirical formula SO2.3.1.5 Chemical formula SO2. 3.1.6 CAS Registry Number1)7446-09-5. 1) Chemical Abstracts Service Registry Number. Licensed Copy: Wang Bin, ISO/EXCHAN

24、GE CHINA STANDARDS, 14/01/2009 01:55, Uncontrolled Copy, (c) BSIBS EN 1019:2005EN 1019:2005 (E) 6 3.1.7 EINECS reference2)231-195-2. 3.2 Commercial form The product is available as a liquefied gas 3.3 Physical properties 3.3.1 Appearance The product is ,at ambient temperature and normal pressure, a

25、colourless gas with a pungent characteristic odour . 3.3.2 Density The liquid density of this product is 1,4 g/ml at 10 C. The vapour density is 2,7 g/l at 0 C. 3.3.3 Solubility in water The product is soluble at 110 g/l at 20 C. 3.3.4 Vapour pressure 320 kPa at 20 C. 3.3.5 Boiling point at 100 kPa3

26、)-9,4 C. 3.3.6 Melting point -75,5 C. 3.3.7 Specific heat Liquid : 1,337 J/(g.K) at 0 C 3.3.8 Viscosity (dynamic) Gas: 11,40 x 10-3mPa.s at 20 C. Liquid: 0,76 mPa.s at 50 C 3.3.9 Critical temperature 157,5 C 2) European Inventory of Existing Commercial Chemical Substances. 3) 100 kPa = 1 bar. Licens

27、ed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 14/01/2009 01:55, Uncontrolled Copy, (c) BSIBS EN 1019:2005EN 1019:2005 (E) 7 3.3.10 Critical pressure 7 780 kPa 3.3.11 Physical hardness Not applicable. 3.4 Chemical properties Sulfur dioxide is an acidic gas and a reducing agent. The pH value of an

28、aqueous solution is about 1,5. Sulfur dioxide reacts violently with oxidizing agents, e.g. peroxides, permanganates. 4 Purity criteria 4.1 General This document specifies the minimum purity requirements for sulfur dioxide used for the treatment of water intended for human consumption. Limits are giv

29、en 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 regulations i

30、n 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 for impuri

31、ties 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

32、to the user. 4.2 Composition of commercial product The product shall contain not less than a mass fraction of 99,9 % of sulfur dioxide 4.3 Impurities and main by-products The product shall conform to the requirements specified in Table 1. The concentration limits refer to pure sulfur dioxide Table 1

33、 Impurities Impurity Limit in mass fraction in % of sulfur dioxide Water max. 0,01 Sulfuric acid max. 0,005 4.4 Chemical parameters The chemical parameters defined in the UE Water Directive are not found in liquid sulfur dioxide. Pesticides and polycyclic aromatic Hydrocarbons are not by-products of

34、 the manufacturing process. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 14/01/2009 01:55, Uncontrolled Copy, (c) BSIBS EN 1019:2005EN 1019:2005 (E) 8 5 Test methods 5.1 Sampling Observe the recommendations of ISO 3165 and also take account of ISO 6206. Sampling shall be carried out by an

35、expert; handling of liquid sulfur dioxide is very dangerous and can lead to serious emissions. 5.2 Analyses 5.2.1 Water The water content shall be determined by Karl Fischer method in accordance with ISO 760. 5.2.2 Sulfuric acid 5.2.2.1 Principle A measured volume of the laboratory sample is evapora

36、ted in a stream of dry nitrogen and the residual sulfuric acid is titrated with a standard volumetric solution alkali. Note: The method will determine sulfuric acid originally present in the sample but will exclude any which might be formed by reaction of water with any sulfur trioxide present. WARN

37、ING: Liquid sulfur dioxide boils at 10 C giving off an irritating toxic gas. Since the liquid is contained in vulnerable glass apparatus great care is necessary in handling. Goggles and rubber gloves should be worn and the test should be carried out in a fume cupboard. 5.2.2.2 Reagents All reagents

38、shall be of recognized analytical grade and the water used shall conform to grade 3 in accordance with EN ISO 3696. 5.2.2.2.1 Sodium hydroxide, solution, c(NaOH) = 0,1 mol/l. 5.2.2.2.2 Bromocresol green indicator, aqueous solution at mass fraction of 0,04 %. 5.2.2.2.3 Nitrogen , dry. 5.2.2.3 Apparat

39、us Ordinary laboratory apparatus and: Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 14/01/2009 01:55, Uncontrolled Copy, (c) BSIBS EN 1019:2005EN 1019:2005 (E) 9 5.2.2.3.1 Evaporator 5.2.2.3.2 Water bath 5.2.2.4 Procedure 5.2.2.4.1 Conditioning the apparatus Condition the evaporator for 12

40、h with dry nitrogen and transfer sufficient liquid sulfur dioxide for the analysis. 5.2.2.4.2 Determination Transfer 200 ml to 250 ml of sample from the dispenser into the flask of the evaporator and place it in position on the water bath. Allow the sample to evaporate over 1 h to 2 h in the stream

41、of nitrogen (5.2.2.2.3) , partly immersing the flask in the boiling water for the last 15 min. Remove the flask from the water bath and allow it to cool whilst still under nitrogen purge. Turn off the nitrogen supply and wash the residual acid from the flask quantitatively into a 25 ml beaker with w

42、ater. Titrate the solution with sodium hydroxide solution (5.2.2.2.1) using the bromocresol green indicator solution (5.2.2.2.2) ( colour change yellow to green). 5.2.2.5 Expression of results The concentration , c, of residual sulfuric acid , expressed in milligrams per kilogram is given by the fol

43、lowing equation: c=( V1x 49,04/ V2x 1,46) x 10 (1) where V1is the volume , in millilitres, of the sodium hydroxide titrated; V2is the volume , in millilitres, of the test sample. Note: 1,46 is the density in grams per millilitre of liquid sulfur dioxide at 10 C. 6 Labelling Transportation Storage 6.

44、1 Means of delivery For all means of delivery pressure vessels, e.g. in isocontainers, drums, cylinders, it shall be guaranteed the purity level required for drinking water treatment specified in clause 4 applies. In order that the purity of the products is not affected, the means of delivery shall

45、not have been used previously for any different product or it shall have been specially cleaned and prepared before use. 6.2 Risk and safety labelling according to the EU Directives4)The following labelling requirements shall apply to sulfur dioxide at the date of the publication of this standard. -

46、 Symbols and indications of danger : T:Toxic. 4) See 2 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 14/01/2009 01:55, Uncontrolled Copy, (c) BSIBS EN 1019:2005EN 1019:2005 (E) 10 - Nature of special risks attributed to dangerous substances : R23:Toxic by inhalation; R 36/37 : Irritating to

47、 eyes and respiratory system. - Safety advice concerning dangerous substances : S 7/9 : Keep container tightly closed and in a well-ventilated place. S 44 : If you feel unwell, seek medical advice (show the label where possible). NOTE Annex I of the Directive 67/548/EEC on classification, packaging

48、and labelling of dangerous substances and its amendments and adaptations in the European Union contains a list of substances classified by the EU. Substances not in this annex I should be classified on the basis of their intrinsic properties according to the criteria in the Directive by the person r

49、esponsible for the marketing of the substance. 6.3 Transportation regulations and labelling Sulfur dioxide is listed under a UN Number 5)1079: RID6)/ADR7): class 2, classification code 2TC. IMDG8): class 2 , label poison gas. IATA9): class 2 , label poison gas. 6.4 Marking The marking shall include the following information : name “ sulfur dioxide “, trade name and grade ; net mass ; name and the address of the supplier and/or manufacturer ; statement “ this product conforms to EN 1019 “. 6.5 Storage 6.5.1 General The prod