1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-21421-0 SANS 50891:2008Edition 1EN 891:2004Edition 2SOUTH AFRICAN NATIONAL STANDARD Chemicals used for treatment of water intended for hum
4、an consumption Iron (III) chloride sulfate This national standard is the identical implementation of EN 891:2004 and is adopted with the permission of CEN, rue de Stassart 36, B-1050 Brussels. Published by Standards South Africa 1 dr lategan road groenkloof private bag x191 pretoria 0001 tel: 012 42
5、8 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 50891:2008 Edition 1 EN 891:2004 Edition 2 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee StanSA TC 5140.19, Water, in accordance
6、with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in April 2008. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 891 November 2004 ICS 71.100.80 Supersedes EN 891:1998 English version Chemicals used for treatment of
7、water intended for human consumption - Iron (III) chloride sulfate Produits chimiques utiliss pour le traitement de leau destine la consommation humaine - Chlorosulfate de fer (III) Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Eisen (III) chloridsulfat This European Standard w
8、as approved by CEN on 30 September 2004. 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 suc
9、h national 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
10、and 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,
11、 Netherlands, 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 2004 CEN All rights of exploitation i
12、n any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 891:2004: ESANS 50891:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 891:2004 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Normative ref
13、erences 5 3 Description .5 4 Purity criteria7 5 Test methods9 6 Labelling - Transportation - Storage12 Annex A (informative) General information on iron (III) chloride sulfate.14 Annex B (normative) Analytical methods .18 Annex C (informative) Reduction of Fe (III) on a silver column33 Annex D (info
14、rmative) Determination of cadmium, chromium, nickel and lead (inductively coupled plasma optical emission spectrometry (ICP/OES)34 Annex E (normative) General rules relating to safety36 Bibliography 37 SANS 50891:2008This s tandard may only be used and printed by approved subscription and freemailin
15、g clients of the SABS .EN 891:2004 (E) 3 Foreword This document (EN 891:2004) 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
16、text or by endorsement, at the latest by May 2005, and conflicting national standards shall be withdrawn at the latest by May 2005. This document supersedes EN 891:1998. Significant technical differences between this edition and EN 891:1998 are as follows: a) replacement of the reference to EU Direc
17、tive 80/778/ of 15 July 1980 with the latest Directive in force (see1) ; b) expansion of annex A by addition of A.2 “Quality of commercial product“ ; c) deletion of annex F. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound t
18、o 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, Spain, Sweden, Switzerland and United K
19、ingdom. SANS 50891:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 891:2004 (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 docume
20、nt: a) this document 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, existing national regulations concerning the use and/or the
21、characteristics of this product remain in force. NOTE Conformity with this 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 Authoritie
22、s. SANS 50891:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 891:2004 (E) 5 1 Scope This document is applicable to iron (III) chloride sulfate used for treatment of water intended for human consumption. It describes the characteristic
23、s of iron (III) sulfate and specifies the requirements and the corresponding analytical methods for iron (III) chloride sulfate (analytical methods are given in Annex B) and gives information on its use in water treatment. It also determines the rules relating to safe handling and use of iron (III)
24、chloride sulfate (see annex E). 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 document (including any amendments) app
25、lies. 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 5790:1979, Inorganic chemical products for industrial use - General method for determination of chloride conte
26、nt - Mercurimetric method. ISO 6206, Chemical products for industrial use - Sampling Vocabulary. 3 Description 3.1 Identification 3.1.1 Chemical name Iron (III) chloride sulfate. 3.1.2 Synonym or common names Ferric chloride sulfate, ferric chloro sulfate, chlorinated copperas. 3.1.3 Relative molecu
27、lar mass 187,36. 3.1.4 Empirical formula FeClSO4. 3.1.5 Chemical formula FeClSO4. SANS 50891:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 891:2004 (E) 6 3.1.6 CAS Registry Number1)12410-14-9. 3.1.7 EINECS reference2)235-649-0. 3.2 C
28、ommercial form Iron (III) chloride sulfate is available as solution. 3.3 Physical properties 3.3.1 Appearance Iron (III) chloride sulfate is a dark brown solution. 3.3.2 Density The density of iron (III) chloride sulfate is approximately 1,5 g/ml. 3.3.3 Solubility (in water) Iron (III) chloride sulf
29、ate is miscible in water. NOTE Diluted solutions can hydrolyse and form a precipitate (see A.3.2). 3.3.4 Vapour pressure Not applicable. 3.3.5 Boiling point at 100 kPa3)102 C. 3.3.6 Freezing point For the iron (III) chloride sulfate the freezing starts at approximately - 50 C. Below 15 C, sharp incr
30、ease in viscosity. 3.3.7 Specific heat Not known. 3.3.8 Viscosity (dynamic) For the iron (III) chloride sulfate the viscosity is approximately 70 mPa.s at 10 C. 1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. 3) 100 kPa = 1 bar. SANS 5
31、0891:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 891:2004 (E) 7 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 The solutions of i
32、ron (III) chloride sulfate are acidic and highly corrosive. 4 Purity criteria 4.1 General This document specifies the minimum purity requirements for iron (III) chloride sulfate used for the treatment of water intended for human consumption. Limits are given for impurities commonly present in the pr
33、oduct. 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 appropri
34、ate 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 this product standard. Limits have been given for impurities and chemical parameters where these are
35、likely to be present in significant quantities from the current production process and raw materials. If the production process or raw materials lead to significant quantities of impurities, by-products, or additives being present, this shall be notified to the user. 4.2 Composition of commercial pr
36、oduct The product shall contain not less than a mass fraction of 36,9 % of FeClSO4(i.e. not less than a mass fraction of 11 % of Fe) and shall be within 3 % of the manufacturers declared values. 4.3 Impurities and main by-products The product shall conform to the requirements specified in Table 1. T
37、he concentration limits refer to Fe (III). SANS 50891:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 891:2004 (E) 8 Table 1 Impurities Impurity Limit Mass fraction of Fe (III) content in % Grade 1 Grade 2 Grade 3 Manganese max. 0,5 1
38、2 Iron(II) amax. 2,5 2,5 2,5 Insoluble matters bmax. 0,2 0,2 0,2 aFe (II) has a lower coagulant efficiency compared to Fe (III). Also hydrolysis of Fe (II) starts at pH value 8, and therefore Fe (II) can remain into the water at lower pH values. bAn excess of insoluble matters indicates the presence
39、 of foreign matter. Iron is a component of the product will usually be removed in the treatment process. 4.4 Chemical parameters The product shall conform to the requirements specified in Table 2. The concentration limits are specified in milligrams per kilogram of Fe (III). Table 2 Chemical paramet
40、ers Parameter Limit in mg/kg of Fe (III) Type 1 Type 2 Type 3 Arsenic (As) max. 1 20 50 Cadmium (Cd) max. 1 25 50 Chromium (Cr) max. 100 350 500 Mercury (Hg) max. 0,1 5 10 Nickel (Ni) max. 300 350 500 Lead (Pb) max. 10 100 400 Antimony (Sb) max. 10 20 60 Selenium (Se) max. 1 20 60 NOTE Cyanide (CN-)
41、, pesticides and polycyclic aromatic hydrocarbons are not relevant since the raw materials used in the manufacturing process are free of them. For maximum impact of iron (III) chloride sulfate on trace metal content in drinking water see A.2. SANS 50891:2008This s tandard may only be used and printe
42、d by approved subscription and freemailing clients of the SABS .EN 891:2004 (E) 9 5 Test methods 5.1 Sampling 5.1.1 General Observe the general recommendations in ISO 3165 and take into account ISO 6206. Prepare the laboratory sample required by the relevant procedure described in 5.1.2 and 5.1.3. 5
43、.1.2 Sampling from drums and bottles 5.1.2.1 General 5.1.2.1.1 Mix the contents of each container to be sampled by shaking the container, by rolling it or by rocking it from side to side, taking care not to damage the container or spill any of the liquid. 5.1.2.1.2 If the design of the container is
44、such (for example, a narrow-necked bottle) that it is impracticable to use a sampling implement, take a sample by pouring after the contents have been thoroughly mixed. Otherwise, proceed as described in 5.1.2.3. 5.1.2.1.3 Examine the surface of the liquid. If there are signs of surface contaminatio
45、n, take samples from the surface as described in 5.1.2.2. Otherwise, take samples as described in 5.1.2.3. 5.1.2.2 Surface sampling Take a sample using a suitable ladle. Lower the ladle into the liquid until the rim is just below the surface, so that the surface layer runs into it. Withdraw the ladl
46、e just before it fills completely and allow any liquid adhering to the ladle to drain off. If necessary, repeat this operation so that, when the other selected containers have been sampled in a similar manner, the total volume of sample required for subsequent analysis is obtained. 5.1.2.3 Bottom sa
47、mpling Take a sample using an open sampling tube, or a bottom-valve sampling tube, suited to the size of container and the viscosity of the liquid. When using an open sampling tube, close it at the top and then lower the bottom end to the bottom of the container. Open the tube and move it rapidly so
48、 that the bottom of the tube traverses the bottom of the container before the tube is filled. Close the tube, withdraw it from the container and allow any liquid adhering at the outside of the tube to drain off. When using a bottom-valve sampling tube, close the valve before lowering the tube into t
49、he container and then proceed in a similar manner to that when using an open sampling tube. 5.1.3 Sampling from tanks and tankers From each access point, take samples as follows: a) from the surface of the liquid, using a ladle as described in 5.1.2.2 ; b) from the bottom of the tank or tanker, using a sampling tube as described in 5.1.2.3 or using specially designed bottom-sampling apparatus ; c) from one or more positions, depending on the overall depth, between the bottom and the surface using a weighted sampling can. SANS 50891:2008This s tandard may o
