EN 14805:2008

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kemikalije, ki se uporabljajo za pripravo pitne vode - Natrijev klorid za pridobivanje klora po elektrokemijskem postopku brez uporabe membranske tehnologijeProdukte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Natriumchlorid zur elektrochemischen Erzeugung von Chlor vor Ort mittels membranloser VerfahrenProduits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Chlorure de sodium pour la génération électrochimique de chlore utilisant des technologies non membranairesChemicals used for treatment of water intended for human consumption - Sodium chloride for on site electrochlorination using non-membrane technology71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 14805:2008SIST EN 14805:2009en,fr,de01-januar-2009SIST EN 14805:2009SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14805June 2008ICS 71.100.80 English VersionChemicals used for treatment of water intended for humanconsumption - Sodium chloride for on site electrochlorinationusing non-membrane technologyProduits chimiques utilisés pour le traitement de l'eaudestinée à la consommation humaine - Chlorure de sodiumpour la génération électrochimique de chlore utilisant destechnologies non membranairesProdukte zur Aufbereitung von Wasser für denmenschlichen Gebrauch - Natriumchlorid zurelektrochemischen Erzeugung von Chlor vor Ort mittelsmembranloser VerfahrenThis European Standard was approved by CEN on 29 May 2008.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 CEN 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 CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14805:2008: ESIST EN 14805:2009

General information on sodium chloride for electrochlorination.16 Annex B (normative)
Analytical methods.18 Bibliography.33
1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commercial chemical Substances Reference. SIST EN 14805:2009

Temperature NaCl solution °C Mass fraction in % - 10 25,0 0 26,34 10 26,35 20 26,43 30 26,56 40 26,71 50 26,89 60 27,09 70 27,30 80 27,53 90 27,80 100 28,12
Key 1 transition point
NaCl Æ NaCl . 2H2O Figure 1 — Solubility curve for sodium chloride in water 3.3.4 Vapour pressure Not applicable. 3.3.5 Boiling point at 100 kPa3) Not applicable.
3) 100 kPa = 1 bar SIST EN 14805:2009

EN 901 (sodium hypochlorite) for those impurities commonly present in the product and the chemical parameters. Consideration has also been given to the requirements of EN 973 (sodium chloride) for regeneration of ion exchangers. 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 1 Users of this product should check the national regulations in order to clarify whether it is of appropriate purity for the 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 and not stated in this product standard. NOTE 2 Using the sodium hypochlorite standard to define limits produces discrepancies with EN 973 regarding sodium chloride for the regeneration of ion exchange water softeners. This should not be taken to imply any real difference between the chemical purity between salt types meeting either specification. 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 process or raw materials lead to significant quantities of impurities, by-products or additives being present, this shall be notified to the user. SIST EN 14805:2009

Type 1 Type 2 Water-insoluble matter max. 0,05 0,35 Bromide max. 0,025 0,05 Table 2 — Moisture content Impurity Limit in mass fraction in % of NaCI content
Dry salt Un-dried salt Moisture content Max. 0,1 5
4.4 Chemical parameters The product shall conform to the requirements specified in Table 3. SIST EN 14805:2009

Table 3 — Chemical parameters Parameter
Limits in mg/kg of commercial product
Type 1 Type 2 Arsenic (As) max. 0,3 1,5 Cadmium (Cd) max. 0,75 1,5 Chromium (Cr) max. 0,75 1,5 Mercury (Hg) max. 1,05 1,5 Nickel (Ni) max. 0,75 3 Lead (Pb) max. 3,5 4,5 Antimony (Sb) max. 6 7,5 Selenium (Se) max. 6 7,5 NOTE Other chemical parameters and indicator parameters are not relevant in sodium chloride, but there might be other parameter limits related to equipment performance, and some of these are listed in Annex A.
5 Test methods 5.1 Sampling A test sample of about 500 g shall be taken for analysis, ensuring that it is representative of the whole batch, and taking account of ISO 3165 and also ISO 6206. Prepare the laboratory sample(s) required in accordance with ISO 8213. 5.2 Analyses 5.2.1 Main product The mass fraction in % of sodium chloride (NaCI) shall be determined by calculation, on the basis of the results of the determinations of sulfate according to ISO 2480, halogens according to ISO 6227, calcium and magnesium according to ISO 2482 and loss of mass on drying according to ISO 2483. Convert sulfate to calcium sulfate and unused calcium to calcium chloride, unless sulfate in sample exceeds the amount necessary to combine with calcium, in which case convert calcium to calcium sulfate and unused sulfate to first to magnesium sulfate and the remaining sulfate to sodium sulfate. Convert unused magnesium to magnesium chloride. Convert unused halogens to sodium chloride. Report the sodium chloride contents on a dry matter basis, multiplying the mass fraction in % of sodium chloride by 100/(100 - P), where P in the percentage of the loss of mass on drying (see 5.2.2.2). 5.2.2 Impurities 5.2.2.1 Water-insoluble matter The content of water-insoluble matter shall be determined in accordance with ISO 2479. 5.2.2.2 Moisture content The loss of mass at 110 °C shall be determined in accordance with ISO 2483. SIST EN 14805:2009

(Na4P2O7 10 H2O) and 150 g of sodium chloride (see note) in 650 ml of water. NOTE As the same quantity of buffer solution is used for the sample and for the blank test solution, it is not necessary to use products completely free of iodine and bromine. 5.2.2.3.4.7 Sodium thiosulfate, standard volumetric solution c(Na2S2O3) = 0,01 mol/l Prepare this solution by dilution of a standard volumetric solution c(Na2S2O3) = 0,1 mol/l and standardize with a potassium iodate solution [c(1/6 KIO3) = 0,01 mol/l]. 5.2.2.3.4.8 Methyl red, 0,5 g/l solution, in 95 % (volume fraction) ethanol. 5.2.2.3.4.9 Starch solution, 2 g/l solution Prepare this solution at the time of use from soluble starch. 5.2.2.3.5 Apparatus Ordinary laboratory apparatus and: 5.2.2.3.5.1 Burette allowing the distribution and measurement of 0,01 ml. 5.2.2.3.6 Procedure 5.2.2.3.6.1 Test portion Weigh, to the nearest 0,1 g, about 40 g of the test sample. NOTE For bromine plus iodine content greater than 200 mg per kilogram of salt, the test portion should be reduced accordingly. 5.2.2.3.6.2 Test solution Transfer the test portion (5.2.2.3.6.1) and 150 ml of water into a 500 ml conical flask. Stir to dissolve. 5.2.2.3.6.3 Blank test solution Transfer 150 ml of water into a 500 ml conical flask. 5.2.2.3.6.4 Determination Proceed with the conical flasks prepared in (5.2.2.3.6.2) and (5.2.2.3.6.3) in the following way. Add 4 drops of methyl red (5.2.2.3.4.8) and hydrochloric acid (5.2.2.3.4.2) until the solution turns red. Neutralize by addition of calcium carbonate (5.2.2.3.4.1) to a permanent slight cloudiness. Add 6,0 ml of buffer solution (5.2.2.3.4.6) and 5,0 ml of sodium hypochlorite solution (5.2.2.3.4.5). Heat to (90 ± 2) °C with agitation to avoid local overheating and keep at this temperature for 20 min. Add 10 ml of formic acid (5.2.2.3.4.3) and swirl. When CO2 ceases to evolve, cool to about 20 °C, add 2,0 ml of potassium iodide solution (5.2.2.3.4.4) and 25 ml of hydrochloric acid (5.2.2.3.4.2). Swirl and allow to stand for 1 min. SIST EN 14805:2009

(
000 1
318,13
01)(VVmc)OS(NaBr322−×××=ω (5) where m is the mass, in grams, of the test portion (5.2.2.3.6.1); V1 is the volume, in millilitres, of sodium thiosulfate (5.2.2.3.4.7) used for the titration of the test solution (5.2.2.3.6.2); V0 is the volume, in millilitres, of sodium thiosulfate (5.2.2.3.4.7) used for the titration of the blank test solution (5.2.2.3.6.3); c(Na2S2O3) is the molar concentration of the sodium thiosulfate standard volumetric solution (5.2.2.3.4.7). 5.2.2.3.7.2 Repeatability and reproducibility Analyses, carried out on three samples by 14 laboratories, have given the following statistical results, each laboratory having furnished results obtained by the same operator performing two analyses per sample: Table 4 — Precision data
Rock salt a Vacuum salt a Sea salt a Number of laboratories 14 13 12 Results, Br mg/kg salt
Mean 141 85 135 Standard deviation for:
— repeatability (sr); 4 1 1 — reproducibility (sR) 14 4 8 a See A.1.
5.2.3 Chemical parameters 5.2.3.1 Cadmium, chromium, nickel, lead, antimony, selenium The contents of chemical parameters, except for arsenic and mercury, shall be determined by inductively coupled plasma optical emission spectrometry (ICP/OES) (see B.1). SIST EN 14805:2009
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