1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 12386:2012Chemicals used for treatmentof water intended for humanconsumption Copper sulfateBS EN 12386:2012 BRITISH STANDARDNational forewordThis British Standard is the UK
2、 implementation of EN 12386:2012. Itsupersedes BS EN 12386:2005 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee CII/59, Chemicals for drinking water treatment.A list of organizations represented on this committee can beobtained on request to its secreta
3、ry.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 77783 7ICS 13.060.20; 71.100.80Compliance with a British Standard
4、cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 November 2012.Amendments issued since publicationDate Text affectedBS EN 12386:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12386 Octob
5、er 2012 ICS 71.100.80 Supersedes EN 12386:2005English Version Chemicals used for treatment of water intended for human consumption - Copper sulfate Produits chimiques utiliss pour le traitement de leau destine la consommation humaine - Sulfate de cuivre Produkte zur Aufbereitung von Wasser fr den me
6、nschlichen Gebrauch - Kupfersulfat This European Standard was approved by CEN on 23 September 2012. 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-
7、to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by transl
8、ation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland
9、, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION
10、COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12386:2012: EBS EN 12386:2012EN 12386:2012 (E) 2 Contents Page
11、Foreword 3Introduction .41 Scope 52 Normative references 53 Description .54 Purity criteria 75 Test methods 86 Labelling Transportation Storage . 17Annex A (informative) General information on copper sulfate . 19Annex B (normative) General rules relating to safety 21Annex C (informative) Routine met
12、hod for the determination of copper in copper sulfate pentahydrate . 22Bibliography . 23BS EN 12386:2012EN 12386:2012 (E) 3 Foreword This document (EN 12386:2012) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFNOR. This European Standard sha
13、ll be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2013, and conflicting national standards shall be withdrawn at the latest by April 2013. Attention is drawn to the possibility that some of the elements of this documen
14、t may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12386:2005. The significant technical differences between this edition and EN 12386:2005 are as follows: Modification of 6.2 on labelling
15、, deletion of the reference to EU Directive 80/778/EEC of 15 July 1980 in order to take account of the latest Directive in force. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria,
16、 Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, S
17、witzerland, Turkey and the United Kingdom. BS EN 12386:2012EN 12386:2012 (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
18、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, existing national regulations concerning the use and/or the characteristics of this product remain in force. NOT
19、E 1 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 this European Standard is subject to regulation or control by National Authorities. NOTE 2 This product is a bioc
20、ide and will need to comply with the relevant legislation in force. In the European Union, at the time of publication, this legislation is Directive 98/8/EC 1. BS EN 12386:2012EN 12386:2012 (E) 5 1 Scope This European Standard is applicable to copper (II) sulfate pentahydrate used for treatment of w
21、ater intended for human consumption. It describes the characteristics and specifies the requirements of copper (II) sulfate pentahydrate 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
22、 use of copper (II) sulfate pentahydrate (see Annex B). 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest
23、 edition of the referenced document (including any amendments) applies. EN ISO 3696, Water for analytical laboratory use Specification and test methods (ISO 3696) ISO 3165, Sampling of chemical products for industrial use Safety in sampling ISO 4793, Laboratory sintered (fritted) filters Porosity gr
24、ading, classification and designation ISO 5993, Sodium hydroxide for industrial use Determination of mercury content Flameless atomic absorption spectrometric method ISO 6206, Chemical products for industrial use Sampling Vocabulary ISO 6332, Water quality Determination of iron Spectrometric method
25、using 1,10-phenanthroline ISO 6353-1, Reagents for chemical analysis Part 1: General test methods 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 n
26、ame Copper (II) sulfate pentahydrate. 3.1.2 Synonym or common names Copper vitriol, blue vitriol, cupric sulfate. 3.1.3 Relative molecular mass For pentahydrate: 249,69. 3.1.4 Empirical formula CuSO4.5H2O. BS EN 12386:2012EN 12386:2012 (E) 6 3.1.5 Chemical formula CuSO4.5H2O. 3.1.6 CAS-Registry Numb
27、er 1)anhydrous form:7758-98-7. pentahydrate: 7758-99-7. 3.1.7 EINECS reference 2)231-847-6 (anhydrous form). 3.2 Commercial form The product is a powder or crystals. 3.3 Physical properties 3.3.1 Appearance The product is a powder or crystals, with a deep blue colour. 3.3.2 Density The density of th
28、e copper (II) sulfate pentahydrate is 2,28 g/cm at 20 C. 3.3.3 Solubility in water The solubility of the copper (II) sulfate pentahydrate is 266 g/l at 20 C. 3.3.4 Vapour pressure Not applicable. 3.3.5 Boiling point at 100 kPa 3)Not applicable. 3.3.6 Melting point The product decomposes above 300 C.
29、 3.3.7 Specific heat Not known. 1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. 3) 100 kPa = 1 bar. BS EN 12386:2012EN 12386:2012 (E) 7 3.3.8 Viscosity, dynamic Not applicable. 3.3.9 Critical temperature Not applicable. 3.3.10 Critical
30、 pressure Not applicable. 3.3.11 Physical hardness Not applicable. 3.4 Chemical properties Copper (II) sulfate pentahydrate dehydrates partially at 29 C and entirely at 250 C. The pH value of an aqueous solution with a concentration of 10 g/l CuSO4is in the range 3,5 to 4. If thermal decomposition o
31、ccurs, SO2is released. 4 Purity criteria 4.1 General This European Standard specifies the minimum purity requirements for copper (II) sulfate pentahydrate used for the treatment of water intended for human consumption. Limits are given for impurities commonly present in the product. Depending on the
32、 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. Users of this product should check the national regulations in order to clarify whether it is of appropriate purity for treatment of
33、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 likely to be present in sign
34、ificant 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 The content of copper
35、(II) sulfate pentahydrate shall not be less than a mass fraction of 98 %. 4.3 Impurities and main by-products The product shall conform to the requirements specified in Table 1. BS EN 12386:2012EN 12386:2012 (E) 8 Table 1 Impurities Impurity Limit in product (pentahydrate) Insoluble matter max Mass
36、fraction 0,5 % Moisture max Mass fraction 0,5 % Free sulfuric acid max Mass fraction 0,2 % Iron (Fe) max 200 mg/kg 4.4 Chemical parameters The product shall conform to the requirements specified in Table 2. Table 2 Chemical parameters Parameter Limit mg/kg of product (pentahydrate) Antimony (Sb) max
37、 1 Arsenic (As) max 5 Cadmium (Cd) max 10 Chromium (Cr) max 5 Lead (Pb) max 70 Mercury (Hg) max 0,1 Nickel (Ni) max 100 Selenium (Se) max 1 NOTE Cyanides (CN-), pesticides and polycyclic aromatic hydrocarbons are not relevant because the raw materials used in the manufacturing process are free of th
38、em. For parametric values of copper (II) sulfate pentahydrate on trace metal content in drinking water, see 2. 5 Test methods 5.1 Sampling Observe the general recommendations of ISO 3165 and take into account ISO 6206. Prepare the laboratory sample(s) required by the relevant procedure described in
39、ISO 8213. 5.2 Analyses 5.2.1 Main product 5.2.1.1 General For routine method, see Annex C. BS EN 12386:2012EN 12386:2012 (E) 9 5.2.1.2 Principle The copper content is determined electrolytically. 5.2.1.3 Reagents All reagents shall be of a recognised analytical grade and the water used shall conform
40、 to the grade 3 specified in EN ISO 3696. 5.2.1.3.1 Nitric acid concentrated, = 1,40 g/ml. 5.2.1.3.2 Sulfuric acid concentrated, = 1,84 g/ml. 5.2.1.3.3 Ethanol, solution volumic fraction 95 %. 5.2.1.4 Apparatus Ordinary laboratory apparatus and glassware, together with the following: 5.2.1.4.1 Direc
41、t current supply. 5.2.1.4.2 Tared, perforated platinum cylinder cathode. 5.2.1.4.3 Platinum wire anode. 5.2.1.5 Test sample Mix a 500 g sample thoroughly and place approximately 100 g of this material in a properly stoppered glass container. 5.2.1.6 Procedure Weigh out a test portion of approximatel
42、y 5 g (m) of copper (II) sulfate pentahydrate as rapidly as possible and transfer quantitatively to a tall-form 400 ml beaker. Dissolve the test portion in 350 ml water and then add 10 ml H2SO4 (5.2.1.3.2). Allow the solution to cool to room temperature. Deposit the copper electrolytically on a tare
43、d, perforated, platinum cylinder cathode (5.2.1.4.2), with a straight platinum wire (5.2.1.4.3) for the anode. Cover the beaker carefully with a split watch glass to prevent loss by spraying. Apply a current density of 0,5 A/dm of cathode area until deposition is complete. The cathode area equals gr
44、oss area of inside of cylinder, including perforations. It is customary to conduct this operation overnight. When the solution is colourless, wash down the watch glass, electrodes and sides of beaker, raising the level of the liquid slightly, and continue the electrolysis for 15 min, noting whether
45、or not copper is deposited on the newly exposed surface of the platinum. If copper appears, raise the level of the liquid and continue the electrolysis until none appears on the electrode. The completion of electrolysis can be determined by testing a few drops of the solution on a spot plate with sa
46、turated hydrogen sulfide solution. Electrolysis is complete when no copper sulfide colouration is observed. When electrolysis is complete, remove the cathode quickly while washing with water from a wash bottle and then rinse the cathode in two successive baths of ethanol 95 % (5.2.1.3.3). Dry in ove
47、n at 110 C for 3 min, cool and weigh as metallic copper. BS EN 12386:2012EN 12386:2012 (E) 10 5.2.1.7 Calculation The content of CuSO4. 5H2O, c1, expressed as mass fraction in %, is calculated by the following formula: 100937,311xxmmc = (1) where m1is the increase of the mass of the electrode in gra
48、ms; m is the mass of the test portion in grams. If results obtained for copper are low, it might be desirable to save the solution (from which the copper has been removed) for the electrolytic determination of nickel, which can be an interference in the analysis. When making analyses, instructions t
49、hat come with the instrument should be followed closely. 5.2.2 Impurities 5.2.2.1 Insoluble matter 5.2.2.1.1 Procedure Weigh 50 g of sample (m2) that has been dried at 95 C (if the sample is composed of crystals, grind to powder with a mortar and pestle) and transfer to a 500 ml beaker. Dissolve in 400 ml of water; add two drops of concentrated H2SO4. Digest with constant stirring at a temperature of 90 C for 4 h, maintaining the original water level by frequent additions of hot water.
