EN 12386:2005

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kemikalije, ki se uporabljajo za pripravo pitne vode - Bakrov sulfatProdukte zur Aufbereitung von Wasser für den menschlichen Gebrauch - KupfersulfatProduits chimiques utilisés pour le traitement de l'eau destinée a la consommation humaine - Sulfate de cuivreChemicals used for treatment of water intended for human consumption - Copper sulfate71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 12386:2005SIST EN 12386:2005en01-september-2005SIST EN 12386:2005SLOVENSKI
STANDARDSIST EN 12386:20001DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12386
June 2005 ICS 71.100.80
Supersedes EN 12386:1998
English version
Chemicals used for treatment of water intended for human consumption - Copper sulfate
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Sulfate de cuivre
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Kupfersulfat This European Standard was approved by CEN on 12 May 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 bibliographical 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 CEN 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, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
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General information on copper sulfate.19 Annex B (normative)
General rules relating to safety.21 Annex C (informative)
Routine method for the determination of copper in copper sulfate pentahydrate.22 Bibliography.23
anhydrous form:7758-98-7. pentahydrate: 7758-99-7. 3.1.7 EINECS reference2)
231-847-6 (anhydrous form). 3.2 Commercial form The product is a powder or crystals. 3.3 Physical properties 3.3.1 Appearance
The product is a powder or crystals, with a deep blue colour. 3.3.2 Density The density of the copper (II)sulfate pentahydrate is 2,28 g/cm³ at 20 °C. 3.3.3 Solubility in water The solubility of the copper (II) sulfate pentahydrate is 266 g/l at 20 °C. 3.3.4 Vapour pressure Not applicable. 3.3.5 Boiling point at 100 kPa3)
Not applicable. 3.3.6 Melting point The product decomposes above 300 °C. 3.3.7 Specific heat Not known.
1) Chemical Abstracts Service Registry Number 2) European Inventory of Existing Commercial Chemical Substances 3) 100 kPa = 1 bar SIST EN 12386:2005

4.3 Impurities and main by-products The product shall conform to the requirements specified in Table 1. Table 1 - Impurities Impurity
Limit in product (pentahydrate) Insoluble matter max. Mass fraction 0,5 % Moisture max. Mass fraction 0,5 %
Free sulfuric acid max. Mass fraction 0,2 %
Iron (Fe) max.
200 mg/kg 4.4 Chemical parameters The product shall conform to the requirements specified in Table 2.
Table 2 – Chemical parameters
Parameter
Limit
mg/kg of product (pentahydrate) Antimony (Sb) max. 1 Arsenic (As) max. 5 Cadmium (Cd) max. 10 Chromium (Cr) max. 5 Lead (Pb) max. 70 Mercury (Hg) max. 0,1 Nickel (Ni) max. 100 Selenium (Se) max. 1 NOTE
Cyanides (CN-), pesticides and polycyclic aromatic hydrocarbons are not relevant because the raw materials used in the manufacturing process are free of them. For parametric values of copper sulfate pentahydrate on trace metal content in drinking water, see [1]. 5 Test methods 5.1 Sampling Observe the general recommendations of ISO 3165 and take into account ISO 6206. Prepare the laboratory sample(s) required by the relevant procedure described in ISO 8213. 5.2 Analyses 5.2.1 Main product NOTE For routine method see Annex C.
350 ml water and then add 10 ml H2SO4 (5.2.1.2.2). Allow the solution to cool to room temperature. Deposit the copper electrolytically on a tared, perforated, platinum cylinder cathode (5.2.1.3.2), with a straight platinum wire (5.2.1.3.3) for the anode. Cover the beaker carefully with a split watch glass to prevent loss by spraying. Apply a current density of 0,5 A/dm² of cathode area until deposition is complete. The cathode area equals gross area of inside of cylinder, including perforations. It is customary to conduct this operation overnight. When the solution is colourless, wash down the watch glass, electrodes and sides of beaker, raising the level of the liquid slightly, and continue the electrolysis for 15 min, noting whether or not copper is deposited on the newly exposed surface of the platinum. If copper appears, raise the level of the liquid and continue the electrolysis until none appears on the electrode. The completion of electrolysis can be determined by testing a few drops of the solution on a spot plate with saturated hydrogen sulfide solution. Electrolysis is complete when no copper sulfide colouration is observed. When electrolysis is complete, remove the cathode quickly while washing with water from a wash bottle and then rinse the cathode in two successive baths of ethanol 95 % (5.2.1.2.3). Dry in oven at 110 °C for 3 min, cool and weigh as metallic copper. SIST EN 12386:2005

is the increase of the mass of the electrode in grams ; m
is the mass of the test portion in grams.
NOTE
If results obtained for copper are low, it may be desirable to save the solution (from which the copper has been removed) for the electrolytic determination of nickel, which can be an interference in the analysis. When making analyses, instructions that come with the instrument should be followed closely. 5.2.2 Impurities 5.2.2.1 Insoluble matter 5.2.2.1.1 Procedure Weigh 50 g of sample (m2) that has been dried at 95 °C (if the sample is composed of crystals, grind to powder with a mortar and pestle) and transfer to a 500 ml beaker. Dissolve in 400 ml of water; add two drops of concentrated H2SO4. Digest with const
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