SIST EN 12485:2001

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kemikalije, ki se uporabljajo za pripravo pitne vode - Kalcijev karbonat, visoko kalcijevo apno in polžgan dolomit - Preskusne metodeProdukte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Calciumcarbonat, Weißkalk und halbgebrannter Dolomit - Analytische VerfahrenProduits chimiques pour le traitement de l'eau destinée a la consommation humaine - Carbonate de calcium, chaux et dolomie semi calcinée - Méthodes d'analyseChemicals used for treatment of water intended for human consumption - Calcium carbonate, high-calcium lime and half-burnt dolomite - Test methods71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 12485:2001SIST EN 12485:2001en01-december-2001SIST EN 12485:2001SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12485April 2001ICS 71.100.80English versionChemicals used for treatment of water intended for humanconsumption - Calcium carbonate, high-calcium lime and half-burnt dolomite - Test methodsProduits chimiques pour le traitement de l'eau destinée à laconsommation humaine - Carbonate de calcium, chaux etdolomie semi calcinée - Méthodes d'analyseProdukte zur Aufbereitung von Wasser für denmenschlichen Gebrauch - Calciumcarbonat, Weißkalk undhalbgebrannter Dolomit - Analytische VerfahrenThis European Standard was approved by CEN on 21 January 2001.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12485:2001 ESIST EN 12485:2001

Page 2EN 12485:2001ContentsPageForeword.31Scope.42Normative references.43General requirements.43.1Number of determinations.43.2Methods for analysis.43.3Sample preparation.53.4Reagents.63.5Glassware.63.6Expression of results.63.7Repeatability and reproducibility limits.73.8Test report.73.9Quality assurance procedures.74Determination of screen oversize of high-calcium lime.84.1Air-jet sieving method.84.2Wet sieving method.105Preparation of test solutions.115.1Fusion with lithium tetraborate.115.2Extraction with hydrochloric acid.125.3Microwave digestion with nitric acid.135.4Pressurized digestion with nitric acid.146Conventional methods of determining major and minor constituents.156.1Determination of free water.156.2Determination of carbon dioxide.166.3Determination of residue insoluble in hydrochloric acid.176.4Determination of content of water soluble calcium oxide or calcium hydroxide.186.5Water-insoluble matter.206.6Determination of free CaO in half-burnt dolomite.216.7Determination of calcium oxide and magnesium oxide.226.8Determination of sulfate content.246.9Calculation of composition of commercial product.267Determination of minor constituents.277.1Determination of minor constituents by AAS flame technique.277.2Determination of minor constituents by ICP-OES.318Determination of trace elements.368.1Determination of lead, cadmium, chromium and nickel by AAS graphite tube technique.368.2Determination of lead, cadmium, chromium and nickel by ICP-OES.418.3Determination of arsenic, antimony and selenium by AAS hydride technique.458.4Determination of mercury by cold-vapour technique.48Annex A (informative)
Analytical sheme.52Annex B (informative)
Precision data for the test methods.56Bibliography.57SIST EN 12485:2001

Page 3EN 12485:2001ForewordThis European Standard has been prepared by Technical Committee CEN/TC 164 "Water Supply", the secretariatof which is held by AFNOR.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by October 2001, and conflicting national standards shall be withdrawn at the latestby October 2001.The annexes A and B are informative.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden,Switzerland and the United Kingdom.SIST EN 12485:2001

Page 4EN 12485:20011 ScopeThis European standard describes methods used of the analyses of calcium carbonate, high-calcium lime and half-burnt dolomite used to treat water for human consumption.NOTEOf the reference methods described, the atomic spectroscopy methods are preferred to the conventional methods. Ifmethods other than those described are used, it should be demonstrated that the results are equivalent to those of thereference methods.The schematic diagram of the chemical analysis is given in annex A (Figures A.1 to A.4).2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this Europeanstandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 459-2, Building lime – Part 2: Test methods.EN 1017, Chemicals used for treatment of water intended for human consumption - Half-burnt dolomite.EN 1018, Chemicals used for treatment of water intended for human consumption - Calcium carbonate.EN 12518, Chemicals used for treatment of water intended for human consumption - High-calcium lime.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 4793, Laboratory sintered (fritted) filters - Porosity grading, classification and designation.ISO 5725-2, Accuracy (trueness and precision) of measurement methods and results - Part 2 : Basic method forthe determination of repeatability and reproducibility of a standard measurement method.3 General requirements3.1 Number of determinationsTwo analyses shall be carried out to determine the various constituents (see clause 5 to clause 8, see also 3.6).3.2 Methods for analysisThe methods to be used for analysis of half-burnt dolomite, calcium carbonate and high calcium lime and theprinciple of each method are listed in Table 1.SIST EN 12485:2001

Page 5EN 12485:2001Table 1 — Methods for analysisDeterminationMethodPrincipleStandardScreen oversize4.1Air-jet sievingEN 125184.2Wet sievingEN 12518Free water6.1GravimetryEN 12518Carbon dioxide6.2GravimetryEN 1017, EN 12518Residue insoluble inhydrochloric acid6.3Acidimetry, GravimetryEN 1018Water-soluble calcium oxideor calcium hydroxide6.4Acidimetric titrationEN 12518Water-insoluble constituents6.5GravimetryEN 12518Free calcium oxide6.6Extraction, acidimetric titrationEN 1017Calcium and magnesium6.7Complexometric titrationEN 1017, EN 1018Sulfur6.8Barium sulfate gravimetryEN 1017Magnesium,Silicium,Aluminium,Iron,Manganese7.1or7.2AAS (flame)orICP-OESEN 1017, EN 1018EN 1017, EN 12518EN 1017, EN 12518EN 1017, EN 12518EN 12518Sulfate7.2ICP-OESEN 1017Lead,Cadmium,Chromium,Nickel8.1or8.2AAS (flameless)orICP-OESEN 1017, EN 1018,EN 2518Arsenic,Antimony,Selenium8.3AAS (hydride)EN 1017, EN 1018,EN 12518Mercury8.4AAS (cold-vapour technique)EN 1017, EN 1018,EN 125183.3 Sample preparationThe general recommendations specified in ISO 3165 shall be observed when sampling. Sampling shall beperformed in accordance with EN 459-2. For products less than 6 mm grain size, the size of the sample shall be 1l.Before performing the chemical analyses, the size of the sample shall be reduced by using a sample divider and/orby dividing it into four parts in order to obtain a suitable subsample. The coarse-grain material in this sample shallbe reduced to a size of less than 0,2 mm before performing the chemical analysis.When sampling milk of lime, the material from which the sample is to be taken shall be thoroughly mixed with anelectrically driven stirrer of adequate power. The milk of lime shall be dried at (105
5) C (see 6.1) before beinganalysed chemically.Since the subsamples under examination are altered by the absorption of moisture and carbon dioxide, theirexposure to air shall be minimized. They shall therefore be transported and stored in air-tight containers and all thehandling shall be carried out as quickly as possible.SIST EN 12485:2001

Page 6EN 12485:20013.4 ReagentsAll reagents shall be of a recognized analytical grade appropriate for the method being used. The water used shallconform to grade 3 in accordance with EN ISO 3696 unless otherwise specified in the method. The concentrationof the analytes in the water and reagents shall be negligible compared with the lowest concentration to bedetermined.The concentrated liquids used for the reagents in this standard have the following densities () (in grams permillilitre at 20 C) : hydrochloric acid1,16 to 1,19 ; nitric acid1,40 to 1,42 ; ammonium hydroxide solution0,88 to 0,91 ; triethanolamine1,12.Dilutions are specified as the sum of the volumes. Thus, (1+2) dilute hydrochloric acid means 1 part by volume ofconcentrated hydrochloric acid mixed with 2 parts by volume of water.The concentrations of reference and standard volumetric solutions are specified as amount-of-substanceconcentrations, c (mol/l), while those of stock and standard solutions are specified as concentrations by mass,c (g/l or mg/l).Suit
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