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、g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 12122:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 April 2006 BSI 2006ISBN 0 580 47489 5National forewordThis British Stand
3、ard 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 It supersedes BS EN 12122:1999 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee CII/59, Chemicals for drinking water treatment, which has the responsibility to: A list of organizations repre
4、sented 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 United Kingdom voted against the approval of EN 12122. The main reason for this disappro
5、val 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 for the analysis of water.Cross-referencesThe British Standards which implement inter
6、national 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 BSI Electronic Catalogue or of British Standards Online.This publication does not purpo
7、rt 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 enquirers to understand the text; present to the responsible international/European committee
8、 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 comprises a front cover, an inside front cover, the EN title page, pages 2 to 20, an insi
9、de 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 CommentsEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12122 June 2005 ICS 71.100.80 Supersedes EN 12122:1998 English
10、version Chemicals used for treatment of water intended for human consumption - Ammonia solution Produits chimiques utiliss pour le traitement de leau destine la consommation humaine - Ammoniaque Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Ammoniaklsung This European Standard
11、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 national standard without any alteration. Up-to-date lists and bibliographical references concerning such n
12、ational 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 any other language made by translation under the responsibility of a CEN member into its own language and
13、 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, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Ne
14、therlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United 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 a
15、ny form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12122:2005: EEN 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 (INFORMA
16、TIVE) GENERAL INFORMATION ON AMMONIA SOLUTION . 18 ANNEX B (NORMATIVE) GENERAL RULES RELATING TO SAFETY 19 BIBLIOGRAPHY 20 EN 12122:2005 (E) 3 Foreword This European Standard (EN 12122:2005) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFNOR
17、. 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 12122:1998. Signi
18、ficant 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, the national standards organizations of
19、 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, Slovenia, Spa
20、in, Sweden, Switzerland and United Kingdom. EN 12122:2005 (E) 4 Introduction 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 pr
21、oduct 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, existing national regulations concerning the use and/or the characteristics of this product remain in force. NOTE Conformity
22、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 this document is subject to regulation or control by National Authorities. EN 12122:2005 (E) 5 1 Scope This European Standard is
23、 applicable to ammonia solution used for treatment of water intended for human consumption. 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
24、the rules relating to safe handling and use of ammonia solution (see Annex B). 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 latest edition of the ref
25、erence document (including any amendments) applies. EN ISO 3696, Water for analytical laboratory 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
26、 content - flameless atomic absorption spectrometric method ISO 6206, Chemical products for 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
27、7108, Ammonia solution for industrial use - Determination of ammonia content - Titrimetric 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 Sy
28、nonym or common name Ammonia solution. 3.1.3 Relative molecular mass 35,05. 3.1.4 Empirical formula NH4OH. EN 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
29、 % of 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 i
30、n any 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 pr
31、oduct 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. EN 12122:2005 (E) 7 3.
32、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 critical pressure of the product is 11 250 kPa (NH3vapour above liquid). 3.3.11 Phys
33、ical 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. It reacts with carbon dioxide, e.g. from air, to form carbonate. 4 Purity criter
34、ia 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. Depending on the raw material and the manufacturing process other impurities ma
35、y 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 purity for treatment of water intended for human consumption, taking into account
36、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 likely to be present in significant quantities from the current production process an
37、d 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 The commercial product shall contain at least a mass fraction of 25 % of ammoni
38、a 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 requirements specified in table 1. EN 12122:2005 (E) 8 Table 1: Impurities Impurity Lim
39、it in mg/kg of the product Residue after evaporation 30 Iron (Fe) 10 4.4 Chemical parameters The product shall conform to the requirements 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 Chro
40、mium (Cr) max. 5 Lead (Pb) max. 5 Mercury (Hg) max. 0,1 Nickel (Ni) max. 5 Selenium (Se) max. 2 NOTE : Pesticides and polycyclic aromatic 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 ammo
41、nia solution on trace metal content in drinking water, see 1. 5 Test methods 5.1 Sampling Observe the general recommendations of ISO 3165 and take account of ISO 6206 and see 3. EN 12122:2005 (E) 9 5.1.1 Sampling from bulk containers SAFETY PRECAUTIONS : Do not use compressed air to discharge ammoni
42、a solution from bulk containers. Whenever it is necessary 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 personne
43、l. Withdraw samples from the tank by means of a sampling 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,
44、 cool them immediately and keep them in a cool place (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
45、sample required in a bottle fitted with an internal 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 solutio
46、ns, since reduction of pressure readily depletes the 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
47、 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, polyethyl
48、ene, polypropylene or glass. Start the siphon by applying a slight air pressure to the drum, e.g. from a hand bellows or bulb, provided that the end of the delivery tube is below the level of liquid in the drum. If a polyethylene or polypropylene sampling thief is used to draw the sample, use the pr
49、ocedure described in 5.1.1. 5.1.2.2 Carboys SAFETY PRECAUTIONS : Do not use compressed air to discharge ammonia solution from carboys. Sample from carboys by pouring, by siphoning, by the use of a polyethylene or polypropylene sampling thief or by the use of a hand-operated pump. If the sample is to be obtained by pouring, use a properly constructed carboy tilter. EN 12122:2005 (E) 10 If the sample is to be obtained from siphoning, use a suitable siphon constructed from stainless steel, polyethylene, polypropylene or glass. Start the s
