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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 888:1999 The Europe
2、an Standard EN 888:1998 has the status of a British Standard ICS 71.100.80 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Chemicals used for treatment of water intended for human consumption Iron(III) chloride Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:21:13 GM
3、T+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 888:1999 This British Standard, having been prepared under the direction of the Sector Committee for Materials and Chemicals, was published under the authority of the Standards Committee and comes into effect on 15 January 1999 BSI 01-1999 ISBN 0 580 30
4、638 0 Amendments issued since publication Amd. No.DateText affected National foreword This British Standard is the English language version of EN 888:1998. The UK participation in its preparation was entrusted to Technical Committee CII/59, Chemicals for drinking water treatment, which has the respo
5、nsiblity to: aid enquirers to understand the text; present to the responsible European committee any enquries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developements and promulgate them in the UK. A list of organiza
6、tions represented on this committee can be obtained on request to its secretary. The United Kingdom did not support this standard at the CEN Enquiry stage and voted against its acceptance at the Formal Vote stage. The principal UK objections were as follows. a) The limits for manganese, iron(II) and
7、 insoluble matter in Table 2 are expressed as percentages of the iron(III) content whereas the analytical methods described in annex B give the results as mg/kg of the product for manganese and a percentage by mass of the product for the other two impurities. b) The method for the determination of t
8、otal iron, described in B.1.1, requires the use of mercury(II) chloride, which is classified as acutely toxic. c) Specifying deionized water in B.3.3.1 is inappropriate: the water should conform to grade 3 in accordance with EN ISO 3696. d) No instructions are given in B.4 for the preparation of the
9、 calibration curve for the determinations of arsenic, antimony and selenium. The standard additions technique, to which reference is made, is not relevant because any matrix interference is removed by conversion of the elements to gaseous hydrides. Additional information Article 8 of the Council of
10、the European Community Directive 80/778/EEC relating to the quality of water intended for human consumption requires Member States to ensure that substances used in the preparation of drinking water do not cause any contravention of the maximum admissible concentrations prescribed in annex 1 to the
11、Directive. This requirement is given effect in England and Wales by regulation 25 of the Water Supply (Water Quality) Regulations 1989 (similar provisions apply in Scotland and Northern Ireland). Regulation 25 makes provision for attaching conditions of use to chemicals which are authorized for use
12、in public water supplies. Details of conditions of use are contained in the Secretary of States List of Approved Products published by the Drinking Water Inspectorate, Floor 2/A1, Ashdown House, 123 Victoria Street, London SW1E 6DE. Cross-references The British Standards which implement internationa
13、l or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the
14、 necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title pag
15、e, pages 2 to 16, an inside back cover and a back cover. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:21:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue
16、 de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 888:1998 E EUROPEAN STANDARDEN 888 NORME EUROPE ENNE EUROPA ISCHE NORM August 1998 ICS 71.100.80 Descriptors: potable water, water treatment, che
17、mical compounds, iron chloride, description, physical properties, chemical properties, impurities, toxic substances, tests, labelling, storage, utilization English version Chemicals used for treatment of water intended for human consumption Iron(III) chloride Produits chimiques utilise s pour le tra
18、itement de leau destine e a la consommation humaine Chlorure de fer(III) Produkte zur Aufbereitung von Wasser fu r den menschlichen Gebrauch Eisen(III) chlorid This European Standard was approved by CEN on 22 July 1998. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
19、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 member. This European Standa
20、rd 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 members are the national standa
21、rds bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:21:13 GMT+00:00 2006, Uncontrolled C
22、opy, (c) BSI Page 2 EN 888:1998 BSI 01-1999 Foreword This European Standard 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 publication of an identical tex
23、t or by endorsement, at the latest by February 1999, and conflicting national standards shall be withdrawn at the latest by February 1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard:
24、 Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 Introduction3 1Scope3 2Normative references3 3Description3 3.1Identification3 3.
25、2Commercial forms3 3.3Physical properties3 3.4Chemical properties4 4Purity criteria4 4.1Composition of commercial product4 4.2Impurities and main by-products4 4.3Toxic substances4 5Test methods5 5.1Sampling5 5.2Analyses5 6Labelling Transportation Storage6 6.1Means of delivery6 6.2Risk and safety lab
26、elling according to the EU Directives6 6.3Transportation regulations and labelling6 6.4Marking7 6.5Storage7 Annex A (informative) General information on iron(III) chloride7 Annex B (normative) Analytical methods7 Annex C (informative) Reduction of Fe(III) on a silver column14 Annex D (informative) D
27、etermination of cadmium, chromium, nickel and lead inductively coupled plasma optical emission spectrometry (ICP/OES)15 Annex E (normative) General rules relating to safety16 Annex F (informative) Bibliography16 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:21:13 GMT+00:00 2006, Uncontro
28、lled Copy, (c) BSI Page 3 EN 888:1998 BSI 01-1999 1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. Introduction In respect of potential adverse effects on the quality of water intended for human consumption, caused by the product covere
29、d 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 awaiting the adoption of verifiable European criteria, existing national regulations concerning the
30、use and/or the characteristics of this product remain in force. 1 Scope This European Standard is applicable to iron(III) chloride (a), iron(III) chloride hexahydrate (b) and iron(III) chloride solution (c) used for treatment of water intended for human consumption. It describes the characteristics
31、and specifies the requirements and the corresponding test methods for iron(III) chlorides (a), (b) and (c) and gives information on its use in water treatment. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normativ
32、e references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated referenc
33、es the latest edition of the publication referred to 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 6206, Chemical products for industrial use Sampling Vocabu
34、lary. ISO 8213, Chemical products for industrial use Sampling techniques Solid chemical products in the form of particles varying from powders to coarse lumps. 3 Description 3.1 Identification 3.1.1 Chemical name a) Iron(III) chloride (FeCl3). b) Iron(III) chloride hexahydrate (FeCl3.6 H2O). c) Iron
35、(III) chloride solution. 3.1.2 Synonym or common names a) Ferric chloride, water free ferric chloride. b) Ferric chloride hexahydrate. c) Ferric chloride solution. 3.1.3 Relative molecular mass a) 162,21 b) 270,31 3.1.4 Empirical formula a) FeCl3 b) FeCl3.6 H2O 3.1.5 Chemical formula a) FeCl3 b) FeC
36、l3.6 H2O 3.1.6 CAS Registry Number1) a) and c) 7705-08-0 b) 10025-77-1 3.1.7 EINECS reference2) 231-729-4 3.2 Commercial forms a) Crystalline powder. b) Crystalline granules. c) Aqueous solutions. 3.3 Physical properties 3.3.1 Appearance a) Hygroscopic, dark grey crystalline powder with a greenish s
37、heen. b) Hygroscopic, yellow deliquescent crystalline granules. c) Dark brown liquids. 3.3.2 Density a) 2,89 g/cm3at 20 8C. b) 1,8 g/cm3at 20 8C. c) 1,43 g/ml at 20 8C for a concentration of 40 % (m/m) of FeCl3. The bulk density of (a) and (b) is about 1,0 kg/dm3. 3.3.3 Solubility (in water) At 20 8
38、C: a) and b) approximately up to 47 % (m/m) of FeCl3. a), b) and c) dilutable down to about 1 % (m/m) of FeCl3. Below this concentration, hydrolysis and formation of iron hydroxide will occur. 3.3.4 Vapour pressure a) 0,1 kPa at 20 8C. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:21:13
39、GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 888:1998 BSI 01-1999 Table 2 Impurities ImpurityLimit % (m/m) of Fe(III) content Level 1Level 2Level 3 Manganesemax. 0,512 Iron(II)1)max. 2,52,52,5 Insolubles2)max. 0,20,20,2 1) Fe(II) has a lower coagulant efficiency compared to Fe(III). Also, hy
40、drolysis of Fe(II) starts at pH value 8, and therefore Fe(II) can remain in the water at lower pH values. 2) An excess of insolubles indicates the presence of foreign matter. 3) 100 kPa = 1 bar. 3.3.5 Boiling point at 100 kPa3) a) Decomposition occurs at 315 8C. b) Decomposition starts at 160 8C. 3.
41、3.6 Melting point a) 304 8C (point of sublimation). b) 37 8C. c) The melting and crystallization points depending on concentration are given in Table 1. Table 1 Melting point Solution concentrationMelting, crystallization point % (m/m) FeCl38C 34252 40212 45+10 3.3.7 Specific heat a) 600 kJ/kgK. b)
42、Not known. c) Not applicable. 3.3.8 Viscosity (dynamic) a) and b) not applicable. c) about 10 mPas for a solution of 40 % (m/m) of FeCl3at 20 8C. 3.3.9 Critical temperature Not applicable. 3.3.10 Critical pressure Not applicable. 3.3.11 Physical hardness Not applicable. 3.4 Chemical properties Solut
43、ions of (a) and of (b), and solution (c), are acidic and highly corrosive. 4 Purity criteria Limits have been given for impurities and toxic substances where these are likely to be present in significant quantities from the current production process and raw materials. If a change in the production
44、process or raw materials leads to significant quantities of other impurities or by-products being present, this shall be notified to the user. 4.1 Composition of commercial product The products shall conform to the following minimum requirements for (a) and (b): expressed as FeCl3: (a) 99 % (m/m); (
45、b) 59 % (m/m); expressed as Fe(III): (a) 34 % (m/m); (b) 20,3 % (m/m). The concentration of the solution (c) shall be within the manufacturers specifications. The common concentration is: expressed as FeCl3: 40 % (m/m); expressed as Fe(III): 13,7 % (m/m). 4.2 Impurities and main by-products The prod
46、uct shall conform to the requirements specified in Table 2. The concentration limits refer to Fe(III). 4.3 Toxic substances NOTEFor the purpose of this standard, toxic substances are those defined in the EU Directive 80/778/EEC of July 15, 1980 (see F.1). The content of toxic substances shall confor
47、m to the requirements specified in Table 3. The concentration limits are specified in milligrams per kilogram of Fe(III). Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:21:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 5 EN 888:1998 BSI 01-1999 Table 3 Toxic substances ParameterLimit
48、mg/kg of Fe(III) Type 1Type 2Type 3 Arsenic (As)max. 202050 Cadmium (Cd)max. 12550 Chromium (Cr)max. 50350500 Mercury (Hg)max. 0,3510 Nickel (Ni)max. 60350500 Lead (Pb)max. 35100400 Antimony (Sb)max. 102060 Selenium (Se)max. 102060 NOTECyanides, pesticides and polycyclic aromatic hydrocarbons are no
49、t relevant toxic substances as listed in EU Directive 80/778/EEC because they are not likely to be found in the raw materials. 5 Test methods 5.1 Sampling Observe the general recommendations in ISO 3165 and take account of ISO 6206. 5.1.1 Solid Prepare the laboratory sample(s) required by the relevant procedure described in ISO 8213. 5.1.2 Liquid 5.1.2.1 Sampling from drums and bottles 5.1.2.1.1 General 5.1.2.1.1.1 Mix the contents of each container to be sampled by shaking the container, by rolling it or by ro
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