EN 12386:2012

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 à 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 12386:2012SIST EN 12386:2013en,fr,de01-marec-2013SIST EN 12386:2013SLOVENSKI
STANDARDSIST EN 12386:20051DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12386
October 2012 ICS 71.100.80 Supersedes EN 12386:2005English 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 23 September 2012.
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 CEN-CENELEC 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 translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
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General information on copper sulfate . 19Annex B (normative)
General rules relating to safety . 21Annex C (informative)
Routine method for the determination of copper in copper sulfate pentahydrate . 22Bibliography . 23 SIST EN 12386:2013

anhydrous form:7758-98-7. pentahydrate: 7758-99-7. 3.1.7 EINECS reference 2)
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 kPa 3)
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 12386:2013

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 (II) sulfate pentahydrate on trace metal content in drinking water, see [2]. 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 5.2.1.1 General For routine method, see Annex C.
Nitric acid concentrated, ρ = 1,40 g/ml. 5.2.1.3.2
Sulfuric acid concentrated, ρ = 1,84 g/ml. 5.2.1.3.3
Ethanol, solution volumic fraction 95 %. 5.2.1.4 Apparatus Ordinary laboratory apparatus and glassware, together with the following: 5.2.1.4.1
Direct current supply. 5.2.1.4.2
Tared, perforated platinum cylinder cathode. 5.2.1.4.3
Platinum wire anode. 5.2.1.5 Test sample Mix a 500 g sample thoroughly and place approximately 100 g of this material in a properly stoppered glass container. 5.2.1.6 Procedure Weigh out a test portion of approximately 5 g (m) of copper (II) sulfate pentahydrate as rapidly as possible and transfer quantitatively to a tall-form 400 ml beaker. Dissolve the test portion in 350 ml water and then add 10 ml H2SO4 (5.2.1.3.2). Allow the solution to cool to room temperature. Deposit the copper electrolytically on a tared, perforated, platinum cylinder cathode (5.2.1.4.2), with a straight platinum wire (5.2.1.4.3) 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 % (5.2.1.3.3). Dry in oven at 110 °C for 3 min, cool and weigh as metallic copper. SIST EN 12386:2013
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