EN 12933:2008

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kemikalije, ki se uporabljajo za pripravo pitne vode - Kemikalije za uporabo v sili - Trikloroisocianova kislinaProdukte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Produkte für den Notfall - TrichlorisocyanursäureProduits chimiques pour le traitement de l'eau destinée à la consommation humaine - Produits chimiques utilisés en cas d'urgence - Acide trichloroisocyanuriqueChemicals used for treatment of water intended for human consumption - Chemicals for emergency use - Trichloroisocyanuric acid71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 12933:2008SIST EN 12933:2008en,fr,de01-november-2008SIST EN 12933:2008SLOVENSKI
STANDARDSIST EN 12933:20011DGRPHãþD

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12933July 2008ICS 71.100.80Supersedes EN 12933:2000
English VersionChemicals used for treatment of water intended for humanconsumption - Chemicals for emergency use -Trichloroisocyanuric acidProduits chimiques pour le traitement de l'eau destinée à laconsommation humaine - Produits chimiques utilisés encas d'urgence - Acide trichloroisocyanuriqueProdukte zur Aufbereitung von Wasser für denmenschlichen Gebrauch - Produkte für den Notfall -TrichlorisocyanursäureThis European Standard was approved by CEN on 28 June 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 12933:2008: ESIST EN 12933:2008

General information on trichloroisocyanuric acid.19 Annex B (normative)
General rules relating to safety.21 Annex C (normative)
Determination of arsenic, antimony and selenium (atomic absorption spectrometry hydride technique).23 Bibliography.30
 Deletion of reference to EU Directive 80/778/EEC of July 15, 1980 in order to take into account the latest Directive in force (see [1]). Other amendments: a) section 3.1.2 – addition of “Symclosene” as a synonym; b) section 6.1 – inclusion of big bags as permitted means of delivery; c) section 6.2 – updating of risk and safety labelling according to EU directives (Annex I of the Directive 67/548EEC and its latest Adaptations to Technical Progress): 1) inclusion of “N : Dangerous for the environment”; 2) deletion of
R phrase:  R 34: Causes burns. 3) addition of R phrase
 R 50/53: Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. 4) addition of S phrases:  S2: Keep out of the reach of children.  S 60: This material and its container must be disposed of as hazardous waste.  S 61: Avoid release to the environment. Refer to special instructions/safety data sheets. d) section 6.4 – addition of
“Symclosene” as one possible chemical name. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, SIST EN 12933:2008

3.1.6 CAS Registry Number1) 87-90-01 3.1.7 EINECS reference2) 201-782-8 3.2 Commercial form The product is available in various forms: powder, granules or tablets. 3.3 Physical properties 3.3.1 Appearance and odour The product is white free-flowing powder, granules or tablets with chlorinous odour. 3.3.2 Density The bulk density of the product is approximately : 1 g/cm3;
1,2 g/cm3 for powder and granules;
1,9 g/cm3 for tablets. 3.3.3 Solubility in water The solubility of the product in water is 12 g/l at 25 °C.
1) Chemical Abstracts Service Registry Number 2) European Inventory of Existing Commercial Chemical Substances SIST EN 12933:2008

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 dosage, contents of other impurities and additives used in the product not stated in this product standard.
3) 100 kPa = 1 bar SIST EN 12933:2008

Limit mg/kg of product
type 1 type 2 Arsenic (As) max. 10 10 Cadmium (Cd) max. 1 1 Chromium (Cr) max. 6 10 Mercury (Hg) max. 0,02 0,02 Nickel (Ni) max. 3 5 Lead (Pb) max. 4 15 Antimony (Sb) max. 5 5 Selenium (Se) max. 1 1 NOTE Cyanide, which does not exist in a strong oxidizing medium such as trichloroisocyanuric acid, is not a relevant chemical parameter. Pesticides and polycyclic aromatic hydrocarbons are not by-products of the manufacturing process. For parametric values of trichloroisocyanuric acid on trace metal content in drinking water, see [1].
5 Test methods 5.1 Sampling Observe the general recommendations of ISO 3165 and take account of ISO 6206. Prepare the laboratory sample(s) required by the relevant procedure described in ISO 8213. SIST EN 12933:2008

Alternatively a standard volumetric solution can be prepared by the following procedure: Dissolve 24,8 g Na2S2O3 . 5 H2O in a 1 000 ml one-mark volumetric flask in about 0,75 l water. After the temperature has equalized make up to the mark with water and mix thoroughly.
To standardize: Weigh, to the nearest 0,1 mg, 3,600 g (m)of dry potassium iodate. Dissolve in water in a
1 000 ml one-mark volumetric flask, make up to the mark with water and mix (standard reference solution c(1/6KIO3) = 0,1 mol/l ). Place 200 ml of water in a 500 ml stoppered conical flask, add (2 ± 0,5) g of potassiumiodide and stir to dissolve. Then introduce, by means of a pipette, 10,0 ml of sodium thiosulfate solution forstandardization, add (15 ± 1) ml of hydrochloric acid solution (diluted 1 + 1 by volume) and (5 ± 1) ml of starch solution (5.2.1.2.4).
Titrate immediately with the potassium iodate standard reference solution until the appearance of a blue coloration persisting for at least 30 s occurs. Record the volume (V1) of iodate used.
The actual concentration, c, of the sodium thiosulfate standard volumetric solution (Na2S2O3.5H2O), expressed in moles per litre is given by the following equation:
VcV11c×=
(1)
where
c1
is the concentration, expressed in moles per litre, of the potassium iodate standard reference solution [c(1/6 KIO3) = 0,1 mol/l ];
V is the volume, in millilitres, of the sodium thiosulfate standard volumetric solution used for the standardization (V= 10 ml);
V1
is the volume, in millilitres, of potassium iodate standard reference solution used in the titration. SIST EN 12933:2008

is the volume, in millilitres, of the sodium thiosulfate standard volumetric solution (5.2.1.2.3) used for the titration; m0
is the mass, in grams, of the test portion (5.2.1.4.1); 0,003545 is the mass, in grams, of chlorine (Cl2) corresponding to 1,00 ml of sodium thiosulfate solution, c(Na2S2O3.5H2O) = 0,1 mol/l; c is the actual concentration expressed in moles per litre, of the sodium thiosulfate standard volumetric solution (5.2.1.2.3). 5.2.1.6 Accuracy The result is accurate to within ± 0,1 %. SIST EN 12933:2008

m1 is the mass, in grams, before drying; m2 is the mass, in grams, after drying. 5.2.2.2 Sodium chloride 5.2.2.2.1 General This method applies to products with sodium chloride contents in the range of mass fraction from 0 % to 0,05 %. 5.2.2.2.2 Principle The trichloroisocyanuric acid is acidified and then digested to remove all traces of available chlorine. Sodium is analysed in solution by atomic absorption spectrometry. 5.2.2.2.3 Reagents All reagents shall be of a recognized analytical grade and the water used shall conform to grade 3 in accordance with EN ISO 3696. 5.2.2.2.3.1 Sulfuric acid concentrated (H2SO4), mass fraction 95 % minimum. 5.2.2.2.3.2 Sodium standard stock solution, c (Na) = 1 000 µg/ml. SIST EN 12933:2008

(5) where
z
is the mean of the two results, expressed in mass fraction in % . NOTE 1 A 98,3 % to 100,7 % recovery was obtained at Na content of a mass fraction of 20 %. NOTE 2 Repeatability conditions are conditions where mutually independent test results are obtained with the same method on identical test material in the same laboratory by the same operator using the same equipment within short intervals of time. 5.2.3 Chemical parameters 5.2.3.1 Determination of antimony (Sb), arsenic (As), cadmium (Cd), chromium (Cr), lead (Pb), nickel (Ni) and selenium (Se) 5.2.3.1.1 Principle The elements arsenic, antimony, cadmium, chromium, lead, nickel and selenium are determined by atomic absorption spectrometry. 5.2.3.1.2
Reagents All reagents shall be of a recognized analytical grade and the water used shall conform to the grade 3 specified in EN ISO 3696. 5.2.3.1.2.1 Nitric acid, concentrated, density ρ = 1,42 g/ml. 5.2.3.1.3 Procedure 5.2.3.1.3.1 Test portion Weigh, to the nearest 0,01 g, 20 g (m4) of the laboratory sample into a 100 ml one mark volumetric flask. 5.2.3.1.3.2 Test solution Add 1 ml of nitric acid (5.2.3.1.2) to the test portion, dilute with a few millilitres of water and mix. Make up to the mark with water and homogenize. 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:  Cd, Ni and Pb : In accordance with ISO 8288:1986, Method A;  Cr : In accordance with EN 1233;  As, Se and Sb : In accordance with the method given in Annex C; SIST EN 12933:2008

is the mass, expressed in grams, of the test portion; C1 is the available chlorine content in mass fraction of product (see 5.2.1.5). 5.2.3.2 Determination of the mercury content (Hg) 5.2.3.2.1 Principle The element mercury is determined by flameless atomic absorption spectrometry in accordance with EN 1483. 5.2.3.2.2 Reagents All reagents shall be of a recognized analytical grade and the water used shall conform to the grade 3 specified in EN ISO 3696. 5.2.3.2.2.1 Potassium permanganate solution, c(KMnO4) = 50 g/l. 5.2.3.2.2.2 Sulfuric acid, concentrated, density p = 1,84 g/ml. 5.2.3.2.2.3 Hydroxylammonium chloride, solution c(NH2OH.HCl) = 100 g/l. 5.2.3.2.2.4 Potassium dichromate solution, c(K2Cr2O7) = 4 g/l in volume fraction 50 %
nitric acid solution. 5.2.3.2.3 Procedure 5.2.3.2.3.1 Test portion Weigh, to the nearest of 0,01 g, 10 g (m5) of the laboratory sample into a glass beaker. 5.2.3.2.3.2 Test solution Quantitatively transfer the test portion to a 100 ml (V1) volumetric flask. Make up to the mark with water (solution A). Pipette 10 ml of the solution A. Transfer into a 250 ml conical flask, add 60 ml of water, 20 ml of a potassium permanganate solution (5.2.3.2
...