1、BRITISH STANDARDBS EN 12122:2005Chemicals used for treatment of water intended for human consumption Ammonia solution The European Standard EN 12122:2005 has the status of a British StandardICS 71.100.80g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3
2、g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Licensed Copy: Wang Bin, na, Fri Jul 14 08:00:58 BST 2006, Uncontrolled Copy, (c) BSIBS EN 12122:2005This British Standard was published under the authority of the Standards Policy and Strategy Com
3、mittee on 28 April 2006 BSI 2006ISBN 0 580 47489 5National forewordThis British Standard is the official English language version of EN 12122:2005. It supersedes BS EN 12122:1999 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee CII/59, Chemicals for dri
4、nking water treatment, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary.The United Kingdom, as a member of CEN, is obliged to publish EN 12122 as a British Standard. However, attention is drawn to the fact that the Uni
5、ted Kingdom voted against the approval of EN 12122. The main reason for this disapproval was that no information was provided on the preparation of the test solution or the calculation of the result for the determination of iron, in order to apply the method referred to in 5.2.2.2 which is intended
6、for the analysis of water.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BS
7、I Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirer
8、s to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comp
9、rises a front cover, an inside front cover, the EN title page, pages 2 to 20, an inside back cover and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsLicensed Copy: Wang Bin, na, Fr
10、i Jul 14 08:00:58 BST 2006, Uncontrolled Copy, (c) BSIEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12122 June 2005 ICS 71.100.80 Supersedes EN 12122:1998 English version Chemicals used for treatment of water intended for human consumption - Ammonia solution Produits chimiques utiliss pour le
11、 traitement de leau destine la consommation humaine - Ammoniaque Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Ammoniaklsung 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 th
12、e 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 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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies o
14、f 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 United Kingdom. EUROPEAN COMMITTEE FOR STA
15、NDARDIZATION 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 12122:2005: ELicensed Copy: Wang Bin, na, Fri Ju
16、l 14 08:00:58 BST 2006, Uncontrolled Copy, (c) BSIEN 12122:2005 (E) 2 Contents Page FOREWORD 3 INTRODUCTION 4 1 SCOPE. 5 2 NORMATIVE REFERENCES 5 3 DESCRIPTION 5 4 PURITY CRITERIA . 7 5 TEST METHODS 8 6 LABELLING TRANSPORTATION STORAGE 16 ANNEX A (INFORMATIVE) GENERAL INFORMATION ON AMMONIA SOLUTION
17、 . 18 ANNEX B (NORMATIVE) GENERAL RULES RELATING TO SAFETY 19 BIBLIOGRAPHY 20 Licensed Copy: Wang Bin, na, Fri Jul 14 08:00:58 BST 2006, Uncontrolled Copy, (c) BSIEN 12122:2005 (E) 3 Foreword This European Standard (EN 12122:2005) has been prepared by Technical Committee CEN/TC 164 “Water supply”, t
18、he secretariat of 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 December 2005, and conflicting national standards shall be withdrawn at the latest by December 2005. This
19、document supersedes EN 12122:1998. Significant technical differences between this edition and EN 12122:1998 are as follows: deletion of the reference to EU Directive 80/778/EEC of 15 July 1980 in order to take account of the lastest Directive, see1. According to the CEN/CENELEC Internal Regulations,
20、 the national standards organizations 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, P
21、oland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: Wang Bin, na, Fri Jul 14 08:00:58 BST 2006, Uncontrolled Copy, (c) BSIEN 12122:2005 (E) 4 Introduction In respect of potential adverse effects on the quality of water intended for human consumption, ca
22、used 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,
23、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
24、s document is subject to regulation or control by National Authorities. Licensed Copy: Wang Bin, na, Fri Jul 14 08:00:58 BST 2006, Uncontrolled Copy, (c) BSIEN 12122:2005 (E) 5 1 Scope This European Standard is applicable to ammonia solution used for treatment of water intended for human consumption
25、. It describes the characteristics and specifies the requirements of ammonia solution and refers to the corresponding analytical methods. It gives information for its use in water treatment. It also determines the rules relating to safe handling and use of ammonia solution (see Annex B). 2 Normative
26、 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 latest edition of the reference document (including any amendments) applies. EN ISO 3696, Water for analytical labo
27、ratory use - Specification and test methods (ISO 3696:1987) ISO 3165, Sampling of chemical products for industrial use Safety in sampling ISO 5993, Sodium hydroxide for industrial use - Determination of mercury content - flameless atomic absorption spectrometric method ISO 6206, Chemical products fo
28、r industrial use Sampling Vocabulary ISO 6332, Water quality - Determination of iron - Spectrometric method using 1,10-phenanthroline ISO 6353-1, Reagents for chemical analysis. Part 1 General test methods ISO 7108, Ammonia solution for industrial use - Determination of ammonia content - Titrimetric
29、 method ISO 7109, Ammonia solution for industrial use - Determination of residue after evaporation at 105 C - Gravimetric method 3 Description 3.1 Identification 3.1.1 Chemical name Ammonium hydroxide. 3.1.2 Synonym or common name Ammonia solution. 3.1.3 Relative molecular mass 35,05. 3.1.4 Empirica
30、l formula NH4OH. Licensed Copy: Wang Bin, na, Fri Jul 14 08:00:58 BST 2006, Uncontrolled Copy, (c) BSIEN 12122:2005 (E) 6 3.1.5 Chemical formula NH4OH. 3.1.6 CAS-Registry Number 1)1336-21-6. 3.1.7 EINECS reference 2)215-647-6. 3.2 Commercial form The product is a solution of mass fraction of 25 % of
31、 ammonia (NH3) in water. 3.3 Physical properties 3.3.1 Appearance and odour The product is a colourless liquid with a pungent odour. 3.3.2 Density The density of the product (a solution of a mass fraction of 25 % of NH3) is 0,9 g/ml at 20 C. 3.3.3 Solubility The product is miscible with water in any
32、 proportion. 3.3.4 Vapour pressure The vapour pressure of the product is 44 kPa 3)at 21 C. 3.3.5 Boiling point at 100 kPa 3)The product releases ammonia gas as the temperature rises and it begins to evaporate at approximately 38 C. 3.3.6 Crystallisation point The crystallisation point of the product
33、 is approximately - 55 C for a solution of mass fraction of 25 % of NH3. 3.3.7 Specific heat The specific heat of the product is 4,18 kJ/kg.K. 1)Chemical Abstracts Service Registry Number. 2)European Inventory of Existing Commercial Chemical Substances. 3)100 kPa = 1 bar. Licensed Copy: Wang Bin, na
34、, Fri Jul 14 08:00:58 BST 2006, Uncontrolled Copy, (c) BSIEN 12122:2005 (E) 7 3.3.8 Viscosity, dynamic The viscosity dynamic of the product is 1,12 mPa.s at 20 C. 3.3.9 Critical temperature The critical temperature of the product is 132,5 C (NH3vapour above liquid). 3.3.10 Critical pressure The crit
35、ical pressure of the product is 11 250 kPa (NH3vapour above liquid). 3.3.11 Physical hardness Not applicable. 3.4 Chemical properties Air/ammonia vapour mixtures in the range of volume fraction of 15 % to 30 % of NH3form explosive mixtures. Ammonia solution reacts with acids to form ammonium salts.
36、It reacts with carbon dioxide, e.g. from air, to form carbonate. 4 Purity criteria 4.1 General This document specifies the minimum purity requirements for ammonia solution used for the treatment of water intended for human consumption. Limits are given for impurities commonly present in the product.
37、 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 in order to clarify whether it is of appropriate pu
38、rity 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 this product standard . Limits have been given for impurities and chemical parameters where these are likel
39、y 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 product
40、 The commercial product shall contain at least a mass fraction of 25 % of ammonia in water. The product shall contain the stated concentration of NH3within 5 %. 4.3 Impurities and main by-products Due to the manufacturing process by-products are not relevant. The product shall conform to the require
41、ments specified in table 1. Licensed Copy: Wang Bin, na, Fri Jul 14 08:00:58 BST 2006, Uncontrolled Copy, (c) BSIEN 12122:2005 (E) 8 Table 1: Impurities Impurity Limit in mg/kg of the product Residue after evaporation 30 Iron (Fe) 10 4.4 Chemical parameters The product shall conform to the requireme
42、nts specified in Table 2. Table 2 Chemical parameters Parameter Limit mg/kg of commercial product Antimony (Sb) max. 1 Arsenic (As) max. 5 Cadmium (Cd) max. 0,5 Chromium (Cr) max. 5 Lead (Pb) max. 5 Mercury (Hg) max. 0,1 Nickel (Ni) max. 5 Selenium (Se) max. 2 NOTE : Pesticides and polycyclic aromat
43、ic hydrocarbons and cyanides are not relevant in ammonia solution because the raw materials used in the manufacturing are free of them. For parametric values of ammonia solution on trace metal content in drinking water, see 1. 5 Test methods 5.1 Sampling Observe the general recommendations of ISO 31
44、65 and take account of ISO 6206 and see 3. Licensed Copy: Wang Bin, na, Fri Jul 14 08:00:58 BST 2006, Uncontrolled Copy, (c) BSIEN 12122:2005 (E) 9 5.1.1 Sampling from bulk containers SAFETY PRECAUTIONS : Do not use compressed air to discharge ammonia solution from bulk containers. Whenever it is ne
45、cessary to take a sample of ammonia solution from a bulk container, cool the container and vent it to the atmosphere before removing any stopper or cover. Take care to ensure that any escaping ammonia gas is discharged at a point remote from personnel. Withdraw samples from the tank by means of a sa
46、mpling thief made of 25 mm diameter polyethylene or polypropylene tubing, 2 m long and tapered at each end to 10 mm diameter over a minimum of 100 mm tube length. Transfer samples taken from tanks immediately into clean glass screw-stoppered bottles, cool them immediately and keep them in a cool pla
47、ce (e.g. cold water bath or fridge) until required for analysis. Use the following procedure : a) take two consecutive 500 ml samples and discard both in order to clear the sampling tube and bottle and to obtain representative material ; b) take the sample required in a bottle fitted with an interna
48、l solid screw-stopper and rubber gasket. Tighten the stopper as soon as the sample is in the bottle. 5.1.2 Sampling from drums, carboys and bottles General : Do not use suction during the withdrawal of the sample, especially with concentrated solutions, since reduction of pressure readily depletes t
49、he solution of ammonia gas. 5.1.2.1 Drums SAFETY PRECAUTIONS : Do not use compressed air to discharge ammonia solution from drums. Sample from drums by pouring, by siphoning or by means of a polyethylene or polypropylene sampling thief. If the sample is to be obtained from pouring, use a specially constructed elevated platform to hold the drum, and a screw-in pourer and funnel to facilitate transfer and reduce the risk from splashing. If the sample is to be obtained by siphoning, use a suitable siphon constructed from stainless steel, polye
