1、BRITISH STANDARD BS EN 1204:2005 Chemicals used for treatment of water intended for human consumption Calcium tetrahydrogen bis(orthophosphate) The European Standard EN 1204:2005 has the status of a British Standard ICS 71.100.80 BS EN 1204:2005 This British Standard was published under the authorit
2、y of the Standards Policy and Strategy Committee on 31 March 2005 BSI 31 March 2005 ISBN 0 580 45788 5 National foreword This British Standard is the official English language version of EN 1204:2005. It supersedes BS EN 1204:1998 which is withdrawn. The UK participation in its preparation was entru
3、sted to Technical 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 publication
4、s referred to in 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
5、 provisions of 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 interpret
6、ation, or proposals 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 15 and a back cover. The BSI copyrig
7、ht notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1204 March 2005 ICS 71.100.80 Supersedes EN 1204:1997 English version Chemicals used for treatment of wate
8、r intended for human consumption - Calcium tetrahydrogen bis(orthophosphate) Produits chimiques utiliss pour le traitement de leau destine la consommation humaine - Bis- dihydrognophosphate de calcium Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Calciumtetrahydrogen-bis- ortho
9、phosphat This European Standard was approved by CEN on 3 February 2005. 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 bibliograp
10、hical references concerning such 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 CE
11、N member into its own language 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
12、, Lithuania, Luxembourg, Malta, 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 2005 C
13、EN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1204:2005: EEN 1204:2005 (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 - Transportati
14、on - Storage11 Annex A (informative) General information on calcium tetrahydrogen bis(orthophosphate).13 Bibliography 15 EN 1204:2005 (E) 3 Foreword This document (EN 1204:2005) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFNOR. This Europe
15、an Standard 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 1204:1997. Significant techn
16、ical differences between this edition and EN 1204:1997 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
17、the 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, Luxe
18、mbourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 1204:2005 (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)
19、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 characte
20、ristics 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 12
21、04:2005 (E) 5 1 Scope This document is applicable to calcium tetrahydrogen bis(orthophosphate) used for treatment of water intended for human consumption. It describes the characteristics and specifies the requirements and the corresponding tests methods for calcium tetrahydrogen bis(orthophosphate)
22、. 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 document (includin
23、g any amendments) applies. EN 1483, 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. EN ISO 11885, Water quality Determinatio
24、n 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 2997, Phosphoric acid for industrial use Determination of sulfate con
25、tent Method by reduction 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
26、 3360, Phosphoric acid and sodium phosphates for industrial use (including foodstuffs) Determination of fluorine content Alizarin complexone and lanthanum nitrate photometric method. ISO 5373, Condensed phosphates for industrial use (including foodstuffs) Determination of calcium content Flame atomi
27、c absorption spectrometric method. ISO 6206, Chemical products for industrial use Sampling Vocabulary. ISO 6703-1, Water quality Determination of cyanide Part 1 : Determination of total cyanide. ISO 8213, Chemical products for industrial use Sampling techniques Solid chemical products in the form of
28、 particles varying from powders to coarse lumps. ISO 8288, Water quality Determination of cobalt, nickel, copper, zinc, cadmium and lead Flame atomic absorption spectrometric methods. ISO 9174, Water quality Determination of chromium Atomic absorption spectrometric methods. ISO 9965, Water quality D
29、etermination of selenium Atomic absorption spectrometric method (hydride technique). EN 1204:2005 (E) 6 3 Description 3.1 Identification 3.1.1 Chemical name Calcium tetrahydrogen bis(orthophosphate). 3.1.2 Synonym or common name Monocalcium phosphate. 3.1.3 Relative molecular mass 234,0. 3.1.4 Empir
30、ical formula Ca(H 2 PO 4 ) 2 .3.1.5 Chemical formula Ca(H 2 PO 4 ) 2 .3.1.6 CAS Registry Number 1)7758-11-4. 3.1.7 EINECS reference 2)231-837-1. 3.2 Commercial form The calcium tetrahydrogen bis(orthophosphate) is a powder. 3.3 Physical properties 3.3.1 Appearance The product is a white powder. 3.3.
31、2 Density The bulk density of the product varies from 500 g/dm 3to 800 g/dm 3 . 3.3.3 Solubility in water The solubility in water is approximately 0,005 g/l at 25 C. 1) Chemical Abstrats Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. EN 1204:2005 (E) 7 3.3
32、.4 Vapour pressure Not applicable. 3.3.5 Boiling point at 100 kPa 3)Not applicable. 3.3.6 Melting point 1 000 C. 3.3.7 Specific heat Not known. 3.3.8 Viscosity (dynamic) Not applicable. 3.3.9 Critical temperature Not applicable. 3.3.10 Critical pressure Not applicable. 3.3.11 Physical hardness Not a
33、pplicable. 3.4 Chemical properties The suspensions of calcium tetrahydrogen bis(orthophosphate) have acidic reactions. The pH value of a suspension of a mass fraction of 10 % is approximately 3. 3) 100 kPa = 1 bar EN 1204:2005 (E) 8 4 Purity criteria 4.1 General This document specifies the minimum p
34、urity requirements for calcium tetrahydrogen bis(orthophosphate) 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 may be present and, if so, th
35、is 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 raw water quality, required
36、 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 materials. If the production
37、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 content expressed as P 2 O
38、5: mass fraction of (56 2,0) %; calcium content expressed as CaO : mass fraction of (23 2,0) %. 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 4 2 - ) max. 500 Fluoride (F - )
39、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 1204:2005 (E) 9 The product shall conform to the requirements specified in Table 2. Table 2 Chemical parameters Parameter Limit mg/
40、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 relevant in calcium tetrahydrogen bis
41、(orthophosphate). For parametric values of calcium tetrahydrogen bis(orthophosphate) on trace metal content in drinking water, see 1. 5 Test methods 5.1 Sampling Observe the recommendations of ISO 3165 and take account of ISO 6206. Prepare the laboratory sample(s) required by the relevant procedure
42、described in ISO 8213. 5.2 Analyses 5.2.1 Main product The determination of the concentration of phosphate (P 2 O 5 ) is carried out according to ISO 3357. The determination of the concentration of calcium oxide (CaO) is carried out according to ISO 5373. 5.2.2 Impurities 5.2.2.1 Sulfate The sulfate
43、 (SO 4 2 - ) content shall be determined in accordance with ISO 2997. 5.2.2.2 Fluoride The fluoride (F - ) content shall be determined in accordance with ISO 3360. 5.2.3 Chemical parameters NOTE When preparing the calcium tetrahydrogen bis(orthophosphate) for analysis, it is important to ensure that
44、 the chemical parameters are effectively dissolved. The concentration of the solution should be sufficient to permit adequate EN 1204:2005 (E) 10 sensitivity in analysis of the chemical parameters and appropriate steps should be taken to compensate for any matrix interference caused by the concentra
45、tion of calcium tetrahydrogen bis(orthophosphate). 5.2.3.1 Determination of antimony (Sb), arsenic (As), cadmium (Cd), chromium (Cr), cyanide (CN - ), lead (Pb), mercury (Hg), nickel (Ni) and selenium (Se) 5.2.3.1.1 Principle The elements antimony, arsenic, cadmium, chromium, lead, mercury, nickel a
46、nd selenium are determined by atomic absorption spectrometry. Cyanide is determined by molecular absorption spectrometry. 5.2.3.1.2 Reagents All reagents shall be of a recognized analytical grade and the water used shall conform to grade 3 specified in EN ISO 3696. 5.2.3.1.2.1 Hydrochloric acid, con
47、centrated density =1,18 g/ml. 5.2.3.1.3 Procedure 5.2.3.1.3.1 Test portion Weigh, to the nearest 0,001 g, 2,5 g (m) from the laboratory sample into a 100 ml one-mark volumetric flask. 5.2.3.1.3.2 Test solution Add 20 ml of water and 2 ml of the hydrochloric acid (5.2.3.1.2.1), dissolve and make up t
48、o the mark with water and mix. 5.2.3.1.3.3 Determination Determine the content of chemical parameters in the test solution (5.2.3.1.3.2) in accordance with the following methods : Ni and Pb : in accordance with ISO 8288, Method A; Cd : in accordance with EN ISO 5961; Cr : in accordance with ISO 9174
49、; CN -: in accordance with ISO 6703-1; As : in accordance with EN ISO 11969; Se : in accordance with ISO 9965; Sb : in accordance with EN ISO 11885; Hg : in accordance with EN 1483. These methods are providing an interim result (y) expressed in milligrams per litre which needs to be converted to give the final concentration according to the equation in 5.2.3.1.3.4. EN 1204:2005 (E) 11 5.2.3.1.3.4 Expression of resu
