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 SulfurdioxideThis British Standard was published under theauthority of the StandardsPolicy and StrategyCommit
2、tee 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 It supersedes BSEN 1019:1996 which is withdrawn.The UK participation in its preparation was entrusted to
3、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 include all the necessary provisionsof a contract. Users are responsible for its correct application
4、.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS EN 1019:2005EUROPEAN 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 diox
5、ide Produits chimiques pour le traitement de leau destine la consommation humaine - Dioxyde de soufre 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 I
6、nternal 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 Central Secretariat or to any CEN me
7、mber. 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 Central Secretariat has the same status as the official versions. CEN membe
8、rs are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and Unit
9、ed Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE 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:
10、 EBS 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 re
11、lating to safety13 Bibliography.14 BS 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 held by AFNOR. This European Standard shall be given the status of a national standard, either by
12、 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 1019:1995. Significant technical differences between this edition and EN 1019:1995 are as follows: de
13、letion 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 organizations of the following countries are bound to implement this European Standard: Austria,
14、Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. BS EN 1019:2005EN 1019:2005 (E) 4 Int
15、roduction 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 European Standard provides no information as to whether the product may be used without restriction in any of the Member States
16、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 characteristics of this product remain in force. NOTE Conformity with this European standard does not confer or imply acceptance or
17、 approval of the product in any of the Member States of the EU or EFTA. The use of the product covered by this document is subject to regulation or control by National Authorities. BS EN 1019:2005EN 1019:2005 (E) 5 1 Scope This European Standard is applicable to sulfur dioxide used for treatment of
18、water 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 r
19、eferences 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 labor
20、atory 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 Identifica
21、tion 3.1.1 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. BS EN 1019:2005EN 1019:2005 (
22、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 colourless gas with a pungent characteristic odour . 3.3.2 Density The liquid density of this
23、 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)-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
24、 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. BS EN 1019:2005EN 1019:2005 (E) 7 3.3.10 Critical pressure 7 780 kPa 3.3.11 Physical hardness Not a
25、pplicable. 3.4 Chemical properties Sulfur dioxide is an acidic gas and a reducing agent. The pH value of an 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 re
26、quirements for sulfur dioxide 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 present and, if so, this shall be notified to the user an
27、d 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 quality, required dosage, contents of other impuriti
28、es and additives used in the products not stated in this product standard. Limits have been given 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 le
29、ads to significant quantities of impurities, by-products or additives being present, this shall be notified 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 con
30、form to the requirements specified in Table 1. The concentration limits refer to pure sulfur dioxide Table 1 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 ar
31、e not found in liquid sulfur dioxide. Pesticides and polycyclic aromatic Hydrocarbons are not by-products of the manufacturing process. BS 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 o
32、ut by an 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 i
33、s evaporated 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 pres
34、ent. WARNING: 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
35、reagents 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.
36、3 Apparatus Ordinary laboratory apparatus and: BS 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 h with dry nitrogen and transfer sufficient liquid sulfur dioxide for the analysis. 5.2.2.
37、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 of nitrogen (5.2.2.2.3) , partly immersing the flask in the boiling water for the last 15
38、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 water. Titrate the solution with sodium hydroxide solution (5.2.2.2.1) using the bromocreso
39、l 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 following equation: c=( V1x 49,04/ V2x 1,46) x 10 (1) where V1is the volume , in millilitres,
40、 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 6.1 Means of delivery For all means of delivery pressure vessels, e.g. in isocontainers, dru
41、ms, 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 not have been used previously for any different product or it shall have been specially cl
42、eaned 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. - Symbols and indications of danger : T:Toxic. 4) See 2 BS EN 1019:2005EN 1019:2005 (E) 10
43、- Nature of special risks attributed to dangerous substances : R23:Toxic by inhalation; R 36/37 : Irritating to 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
44、 advice (show the label where possible). NOTE Annex I of the Directive 67/548/EEC on classification, packaging 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 c
45、lassified on the basis of their intrinsic properties according to the criteria in the Directive by the person responsible 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.
46、 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 101
47、9 “. 6.5 Storage 6.5.1 General The product is stored under pressure in mild steel containers. The containers shall be kept tightly closed and shall be stored in a cool, well-ventilated place , away from direct sunlight. 5)United Nations Number. 6) Regulations concerning International carriage of Dan
48、gerous goods by rail. 7)European Agreement concerning the international carriage of dangerous goods by Road. 8)International Maritime Transport of Dangerous Goods. 9)International Air Transport Association BS EN 1019:2005EN 1019:2005 (E) 11 6.5.2 Long term stability The product is stable during long
49、-term storage 6.5.3 Storage incompatibilities Storage incompatibilities are covered in 3.4. BS EN 1019:2005EN 1019:2005 (E) 12 Annex A (informative) General information on sulfur dioxide A.1 Origin A.1.1 Raw materials Sulfur dioxide is manufactured from sulfur, sulfides and spent acids. A.1.2 Manufacturing process Sulfur dioxide is produced from sulfur or sulfides by combustion, from spent acids by decomposition and by desulfurization of stack gases. A.2 Use A.2.1 Function Sulfur dioxide is mainly used for the removal of e
