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1、BS EN 12672:2008 ICS 13.060.20; 71.100.80 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Chemicals used for treatment of water intended for human consumption Potassium permanganate Licensed Copy: x x, The University of Sheffield, 01/07/2009 16:12, Uncontrolle
2、d Copy, (c) BSI This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2009 BSI 2009 ISBN 978 0 580 58049 9 Amendments/corrigenda issued since publication DateComments BS EN 12672:2008 National foreword This British Standard is the UK impleme
3、ntation of EN 12672:2008. It supersedes BS EN 12672:2000 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee CII/59, Chemicals for drinking water treatment. A list of organizations represented on this committee can be obtained on request to its secretary.
4、 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 cannot confer immunity from legal obligations. Licensed Copy: x x, The University of Sheffield, 01/07/2009 16:12, Uncontroll
5、ed Copy, (c) BSI BS EN 12672:2008 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12672 July 2008 ICS 71.100.80Supersedes EN 12672:2000 English Version Chemicals used for treatment of water intended for human consumption - Potassium permanganate Produits chimiques utiliss pour le traitement de
6、leau destine la consommation humaine - Parmanganate de potassium Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Kaliumpermanganat This European Standard was approved by CEN on 28 June 2008. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate
7、 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 CEN Management Centre or to any CEN member. This European Standard exis
8、ts 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 CEN Management Centre has the same status as the official versions. CEN members are the national standards b
9、odies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
10、EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12672:2008: E Licensed
11、Copy: x x, The University of Sheffield, 01/07/2009 16:12, Uncontrolled Copy, (c) BSI BS EN 12672:2008 EN 12672:2008 (E) 2 Contents Page Foreword 3 Introduction 4 1 Scope 5 2 Normative references 5 3 Description 5 4 Purity criteria 8 5 Test methods 9 6 Labelling - Transportation - Storage 14 Annex A
12、(informative) General information on potassium permanganate 16 Annex B (normative) General rules relating to safety 18 Bibliography 20 Licensed Copy: x x, The University of Sheffield, 01/07/2009 16:12, Uncontrolled Copy, (c) BSI w w w . b z f x w . c o m BS EN 12672:2008 EN 12672:2008 (E) 3 Foreword
13、 This document (EN 12672:2008) 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 text or by endorsement, at the latest by Januar
14、y 2009, and conflicting national standards shall be withdrawn at the latest by January 2009. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent r
15、ights. This document supersedes EN 12672:2000. Significant technical difference between this edition and EN 12672:2000 is as follows: Deletion of reference to EU Directive 80/778/EEC of July 15, 1980 in order to take into account the latest Directive in force (see 1). According to the CEN/CENELEC In
16、ternal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg,
17、Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: x x, The University of Sheffield, 01/07/2009 16:12, Uncontrolled Copy, (c) BSI w w w . b z f x w . c o m BS EN 12672:2008 EN 12672:2008 (E) 4 Introduction In r
18、espect 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 of the EU or EF
19、TA; 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 approval of the
20、 product in any of the Member States of the EU or EFTA. The use of the product covered by this European Standard is subject to regulation or control by National Authorities. Licensed Copy: x x, The University of Sheffield, 01/07/2009 16:12, Uncontrolled Copy, (c) BSI w w w . b z f x w . c o m BS EN
21、12672:2008 EN 12672:2008 (E) 5 1 Scope This European Standard is applicable to potassium permanganate used for treatment of water intended for human consumption. It describes the characteristics of potassium permanganate and specifies the requirements and the corresponding test methods for potassium
22、 permanganate. It gives information on its use in water treatment. 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 referenced docu
23、ment (including any amendments) applies. EN 1233, Water quality - Determination of chromium - Atomic absorption spectrometric methods EN 1483, Water quality - Determination of mercury Method using atomic absorption spectrometry EN ISO 3696, Water for analytical laboratory use - Specification and tes
24、t methods (ISO 3696:1987) EN ISO 11885, Water quality - Determination of 33 elements by inductively coupled plasma atomic emission spectroscopy (ISO 11885:1996) EN ISO 11969, Water quality - Determination of arsenic Atomic absorption spectrometric method (hydride technique) (ISO 11969:1996) ISO 3165
25、, Sampling of chemical products for industrial use - Safety in sampling ISO 3856-2, Paints and varnishes - Determination of “soluble“ metal content - Part 2: Determination of antimony content - Flame atomic absorption spectrometric method and Rhodamine B spectrophotometric method ISO 6206, Chemical
26、products for industrial use - Sampling Vocabulary ISO 8213, Chemical products for industrial use - Sampling techniques - Solid chemical products in the form of particles varying from powders to coarse lumps ISO 8288:1986, Water quality - Determination of cobalt, nickel, copper, zinc, cadmium and lea
27、d - Flame atomic absorption spectrometric methods ISO 9965, Water quality - Determination of selenium - Atomic absorption spectrometric method (hydride technique) 3 Description 3.1 Identification 3.1.1 Chemical name Potassium permanganate. 3.1.2 Synonym or common name Permanganate of potash. 3.1.3 R
28、elative molecular mass 158,04 Licensed Copy: x x, The University of Sheffield, 01/07/2009 16:12, Uncontrolled Copy, (c) BSI w w w . b z f x w . c o m BS EN 12672:2008 EN 12672:2008 (E) 6 3.1.4 Empirical formula KMnO4 3.1.5 Chemical formula KMnO4 3.1.6 CAS Registry Number 1) 7722-64-7 3.1.7 EINECS re
29、ference 2) 231-760-3 3.2 Commercial forms Solid product, consisting of rhombic crystals. For water treatment the commercial forms normally used are: technical grade to be dosed in liquid form, dissolved in water; free-flowing grade to be dosed either in solid form or dissolved in water. 3.3 Physical
30、 properties 3.3.1 Appearance Crystals of a dark purple or bronze-like colour; almost opaque by transmitted light and of a blue metallic lustre by reflected light. The free-flowing grade can present a different colour, usually greyish. 3.3.2 Density The density of the product is 2,70 g/cm3 at 20 C. T
31、he bulk density is between 1,45 g/cm3 and 1,60 g/cm3. 1) Chemicals Abstracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. Licensed Copy: x x, The University of Sheffield, 01/07/2009 16:12, Uncontrolled Copy, (c) BSI w w w . b z f x w . c o m BS EN 12672:
32、2008 EN 12672:2008 (E) 7 3.3.3 Solubility (in water) The product is soluble in water. The solubility in water is given in Table 1. Aqueous solubility: KMnO4 (g/l )= 30.55 + 0.796 (T, C) + 0.0392 (T, C)2 where T is the Solution Temperature (C). Table 1 Solubility in water Temperature C KMnO4 g/l 5 35
33、,51 10 42,43 15 51,31 20 62,15 25 74,95 30 89,71 3.3.4 Vapour pressure Not applicable. 3.3.5 Boiling point at 100 kPa3) Not applicable. 3.3.6 Melting point Product decomposes at 240 C with emission of oxygen. 3.3.7 Specific heat 744,2 kJ/kg.K at 20 C. 3.3.8 Viscosity (dynamic) Not applicable. 3.3.9
34、Critical temperature Not applicable. 3) 100 kPa = 1 bar Licensed Copy: x x, The University of Sheffield, 01/07/2009 16:12, Uncontrolled Copy, (c) BSI w w w . b z f x w . c o m BS EN 12672:2008 EN 12672:2008 (E) 8 3.3.10 Critical pressure Not applicable. 3.3.11 Physical hardness Not applicable. 3.4 C
35、hemical properties Potassium permanganate is a very strong oxidizing agent. It is soluble in water and dissolves also in various organic solvents (e.g. methanol, ethanol). It decomposes at high temperature and also in the presence of concentrated acids, hydrogen peroxide and organic compounds in gen
36、eral. It hydrolyzes in contact with air, reducing to manganese dioxide (MnO2), a solid, brown to black colour product. 4 Purity criteria 4.1 General This European Standard specifies the minimum purity requirements for Potassium permanganate used for the treatment of water intended for human consumpt
37、ion. 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 and when necessary to relevant authorities. NOTE Users of this product should check the nat
38、ional 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 impurities and additives used in the product not stated in the product standard. Limits have been
39、 given for impurities and chemicals 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
40、shall be notified to the user. 4.2 Composition of commercial product The potassium permanganate content shall not be less than a mass fraction of 98,5 % in the technical grade, and a mass fraction of 97,5 % in the free-flowing grade. 4.3 Impurities and main by-products MnO2 (water insolubles): less
41、than a mass fraction of 1,00 %. Moisture (H2O): less than a mass fraction of 0,50 %. 4.4 Chemical parameters NOTE For the purpose of this standard, “chemical parameters“ are those defined in the EU Directive 98/83/EC of 3 November 1998 (see 1). The content of chemical parameters shall conform to the
42、 requirements specified in Table 2. Licensed Copy: x x, The University of Sheffield, 01/07/2009 16:12, Uncontrolled Copy, (c) BSI BS EN 12672:2008 EN 12672:2008 (E) 9 Table 2 Chemical parameters Parameter Limit mg/kg of product Arsenic (As) max. 20 Cadmium (Cd) max. 50 Chromium (Cr) max. 50 Mercury
43、(Hg) max. 10 Nickel (Ni) max. 50 Lead (Pb) max. 50 Antimony (Sb) max. 50 Selenium (Se) max. 50 NOTE Cyanide, which does not exist in a strong oxidizing medium such as potassium permanganate, is not a relevant chemical parameter. Pesticides and polycyclic aromatic hydrocarbons are not by-products of
44、the manufacturing process. 4.5 Flowability of freeflowing grade The free-flowing grade shall pass the flowability test. 5 Test methods 5.1 Sampling Observe the general recommendations of ISO 3165 and take account of ISO 6206. Prepare the laboratory sample(s) required by the relevant procedure descri
45、bed in ISO 8213. 5.2 Analysis 5.2.1 Determination of potassium permanganate (main product) 5.2.1.1 Principle Reduction of potassium permanganate Mn(VII) to Mn(II) with sodium oxalate under acidic conditions. The excess of sodium oxalate is titrated with a standard volumetric solution of potassium pe
46、rmanganate. 5.2.1.2 Reagents All reagents shall be of a recognized analytical grade and the water used shall conform to grade 3 in accordance with EN ISO 3696. 5.2.1.2.1 Potassium permanganate. 5.2.1.2.2 Sodium oxalate. 5.2.1.2.3 Sulfuric acid solution, 20 % (m/m). 5.2.1.2.4 Potassium permanganate s
47、tandard volumetric solution c(KMnO4) = 1,000 g/l. Weigh 1,000 g of the potassium permanganate (5.2.1.2.1), transfer to a 1 l volumetric flask and dilute to volume with water. Allow to stand with occasional mixing for 15 min. Licensed Copy: x x, The University of Sheffield, 01/07/2009 16:12, Uncontro
48、lled Copy, (c) BSI BS EN 12672:2008 EN 12672:2008 (E) 10 Standardize the solution as follows: Weigh 2,120 g of the sodium oxalate (5.2.1.2.2) and transfer to a 1 l volumetric flask. Add 20 ml of 20 % (m/m) H2SO4 (5.2.1.2.3) to the 1 l volumetric flask containing the oxalate, dissolve and allow to st
49、and for 5 min. Transfer 40 ml of the sodium oxalate solution by pipette into a small conical flask, heat to 70 C to 80 C and titrate with the potassium permanganate standard volumetric solution to a faint pink end-point that persists for 20 s to 30 s. The standardization factor (F) is calculated as follows: V F 40 = (1) where V is the volume, in millilitres, of potassium permanganate standard volumetric solution used in titration. 5.2.1.3 Apparatus 5.2.1.3.1 Ordinary laboratory apparatus and glassware. 5.2.1.4 Procedure Weigh 1,0