1、BRITISH STANDARD BS EN 1211:2005 Chemicals used for treatment of water intended for human consumption Potassium tripolyphosphate The European Standard EN 1211:2005 has the status of a British Standard ICS 71.100.80 BS EN 1211:2005 This British Standard was published under the authority of the Standa
2、rds Policy and Strategy Committee on 31 March 2005 BSI 31 March 2005 ISBN 0 580 45797 4 National foreword This British Standard is the official English language version of EN 1211:2005. It supersedes BS EN 1211:1998 which is withdrawn. The UK participation in its preparation was entrusted to Technic
3、al Committee CII/59, Chemicals for drinking water treatment, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to i
4、n 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 purport to include all the necessary provisions of
5、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 any enquiries on the interpretation, or propo
6、sals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 17 and a back cover. The BSI copyright notice displ
7、ayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN1211 March2005 ICS71.100.80 Su Englishversion Chemicalsusedfortreatmentofwaterintendedforhuman consumptionPotassiumtripolyphos
8、phate Produitschimiquesutilisspourletraitementdeleau destinelaconsommationhumaineTripolyphosphate depotassium ProduktezurAufbereitungvonWasserfrden menschlichenGebrauchKaliumtripolyphosphat ThisEuropeanStandardwasapprovedbyCENon3February2005. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegul
9、ationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversi
10、ons(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland
11、,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeS
12、tassart,36B1050Brussels 2005CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN1211:2005:EEN 1211:2005 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Description .6 4 Purity criteria8 5 Test methods9 6 Labelling - Tr
13、ansportation - Storage14 Annex A (informative) General information on potassium tripolyphosphate .15 Bibliography 17 EN 1211:2005 (E) 3 Foreword This document (EN 1211:2005) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFNOR. This European S
14、tandard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2005, and conflicting national standards shall be withdrawn at the latest by September 2005. This document supersedes EN 1211:1997. Significant technical
15、 differences between this edition and EN 1211:1997 are as follows: a) deletion of the reference to EU Directive 80/778/EEC of July, 15 1980 in order to take into account of the last Directive in force (see 1); b) replacement of ISO 5666-1 by EN 1483 and of EN 26595 by EN ISO 11969. According to the
16、CEN/CENELEC Internal Regulations, the national standards organizations of 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, Luxembou
17、rg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 1211:2005 (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 document: a) this
18、 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 characterist
19、ics of this product remain in force. NOTE Conformity with this document does not confer or imply acceptance or approval of the product in any of the Member States of the EU of EFTA. The use of the product covered by this document is subject to regulation or control by National Authorities. EN 1211:2
20、005 (E) 5 1 Scope This document is applicable to potassium tripolyphosphate used for treatment of water intended for human consumption. It describes the characteristics and specifies the requirements and the corresponding tests methods for potassium tripolyphosphate. It gives information on its use
21、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 document (including any amendments) applies. EN 1483
22、, Water quality Determination of mercury. EN ISO 3696, Water for analytical laboratory use Specification and test methods (ISO 3696:1987). EN ISO 5961, Water quality Determination of cadmium by atomic absorption spectrometry (ISO 5961:1994). EN ISO 11885, Water quality Determination of 33 elements b
23、y 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 2997, Phosphoric acid for industrial use Determination of sulfate content Method by redu
24、ction and titrimetry. ISO 3165, Sampling of chemical products for industrial use Safety in sampling. ISO 3357, Sodium tripolyphosphate and sodium pyrophosphate for industrial use Determination of total phosphorus (V) oxide content Quinoline phosphomolybdate gravimetric method. ISO 3360, Phosphoric a
25、cid and sodium phosphates for industrial use (including foodstuffs) Determination of fluorine content Alizarin complexone and lanthanum nitrate photometric method. ISO 6206, Chemical products for industrial use Sampling Vocabulary. ISO 6703-1, Water quality Determination of cyanide Part 1 : Determin
26、ation of total cyanide. 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, Water quality Determination of cobalt, nickel, copper, zinc, cadmium and lead Flame atomic absorption spectromet
27、ric methods. ISO 9174, Water quality Determination of chromium Atomic absorption spectrometric methods. ISO 9965, Water quality Determination of selenium Atomic absorption spectrometric method (hydride technique). EN 1211:2005 (E) 6 3 Description 3.1 Identification 3.1.1 Chemical name Potassium trip
28、olyphosphate. 3.1.2 Synonym or common name KTPP. 3.1.3 Relative molecular mass 448,0. 3.1.4 Empirical formula K 5 P 3 O 10.3.1.5 Chemical formula K 5 P 3 O 10.3.1.6 CAS Registry Number 1)13845-36-8. 3.1.7 EINECS reference 2)237-574-9. 3.2 Commercial forms The potassium tripolyphosphate is available
29、in a number of different forms (see 3.3.1). Different commercial forms, solids or dissolved in water are possible. All concentrations mentioned refer to the active matter and shall be calculated accordingly. NOTE Potassium tripolyphosphate can be a component of mixtures sold for water treatment purp
30、oses. 3.3 Physical properties 3.3.1 Appearance Solid : the product is a white powder. Liquid : the product is a clear solution. 1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. EN 1211:2005 (E) 7 3.3.2 Density Solid : the bulk density o
31、f the product is equal to 700 g/dm 3 . Liquid : the density of solution is 1,046 g/ml for a product concentration of 50 g/l at 20 C. 3.3.3 Solubility in water The solubility in water is approximately 1 500 g/l at 25 C. 3.3.4 Vapour pressure Not applicable. 3.3.5 Boiling point at 100 kPa 3)Not applic
32、able. 3.3.6 Melting point For the solid product 600 C. 3.3.7 Specific heat Not known. 3.3.8 Viscosity (dynamic) For the solid product it is not applicable. For the liquid the viscosity is equal to 5 mPa.s for a product concentration of 50 g/l. 3.3.9 Critical temperature Not applicable. 3.3.10 Critic
33、al pressure Not applicable. 3.3.11 Physical hardness Not applicable. 3.4 Chemical properties The solutions of potassium tripolyphosphate have alkaline reactions. The pH value of a solution of a mass fraction of 1 % is approximately 9,5. 3) 100 kPa = 1 bar. EN 1211:2005 (E) 8 4 Purity criteria 4.1 Ge
34、neral This document specifies the minimum purity requirements for potassium tripolyphosphate 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 m
35、ay 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 products not stated in this document. Limits have been given for impurities and chemical parameters where these are likely to be present in significant quantities from the current production process and raw m
37、aterials. 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 product shall conform to the following requirements on a dry mass basis: phosphate
38、 content expressed as P 2 O 5: mass fraction of (47,5 1,0) %; potassium content expressed as K 2 O : mass fraction of (51 1,0) %. 4.3 Impurities and main by-products The product shall conform to the requirements specified in Table 1. Table 1 Impurities Impurity Limit mg/kg of dry product Sulfate (SO
39、 4 2 ) max. 500 Fluoride (F - ) max. 10 4.4 Chemical parameters Content of various chemical parameters depends on the origin of the raw materials, most of these elements are present only as traces. EN 1211:2005 (E) 9 The product shall conform to the requirements specified in Table 2. Table 2 Chemica
40、l parameters Parameter Limit mg/kg of dry product Antimony (Sb) max. 3 Arsenic (As) max. 3 Cadmium (Cd) max. 3 Chromium (Cr) max. 10 Cyanide (CN) max. 5 Lead (Pb) max. 10 Mercury (Hg) max. 1 Nickel (Ni) max. 10 Selenium (Se) max. 3 NOTE : Pesticides and polycyclic aromatic hydrocarbons are not relev
41、ant in potassium tripolyphosphate For parametric values of potassium tripolyphosphate on trace metal content in drinking water, see 1. 5 Test methods 5.1 Sampling 5.1.1 General Observe the recommendations of ISO 3165 and take account of ISO 6206. 5.1.2 Solid Prepare the laboratory sample(s) required
42、 by the relevant procedure described in ISO 8213. 5.1.3 Liquid 5.1.3.1 Sampling from drums and bottles 5.1.3.1.1 General 5.1.3.1.1.1 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
43、 spill any of the liquid. 5.1.3.1.1.2 If the design of the container is 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 5.1.3.1.1.3. 5.1.3.1.1.3
44、 Examine the surface of the liquid. If there are signs of surface contamination, take samples from the surface as described in 5.1.3.1.2 ; otherwise, take samples as described in 5.1.3.1.3. 5.1.3.1.2 Surface sampling Take a sample using a suitable ladle. Lower the ladle into the liquid until the rim
45、 is just below the surface, so that the surface layer runs into it. Withdraw the ladle just before it fills completely and allow any liquid adhering to the EN 1211:2005 (E) 10 ladle to drain off. If necessary, repeat this operation so that, when the other selected containers have been sampled in a s
46、imilar manner, the total volume of sample required for subsequent analysis is obtained. 5.1.3.1.3 Bottom sampling 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
47、 the top and then lower the bottom end to the bottom of the container. Open the tube and move it rapidly so 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 to the outside of the
48、tube to drain off. When using a bottom-valve sampling tube, close the valve before lowering the tube into the container and then proceed in a similar manner to that when using an open sampling tube. 5.1.3.2 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 5.1.3.1.2; b) from the bottom of the tank or tanker, using a sampling tube as described in 5.1.3.1.3 or using specially designed bottom-sampling apparatus; c) from
