EN 12124:2012
(Main)Chemicals used for treatment of water intended for human consumption - Sodium sulfite
Chemicals used for treatment of water intended for human consumption - Sodium sulfite
This European Standard is applicable to sodium used for treatment of water intended for human consumption .It describes the characteristics and specifies the requirements of sodium sulfite and refers to the corresponding analytical methods. It gives information for its use in water treatment.
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Natriumsulfit
Diese Europäische Norm gilt für Natriumsulfit zur Aufbereitung von Wasser für den menschlichen Gebrauch. Sie beschreibt die Eigenschaften von Natriumsulfit, legt die Anforderungen an Natriumsulfit fest und verweist auf die entsprechenden Analysenverfahren. Sie enthält Angaben zu dessen Anwendung in der Wasseraufbereitung.
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Sulfite de sodium
La présente Norme Européenne est applicable au sodium utilisé pour le traitement de l'eau destinée à la consommation humaine. Elle décrit les caractéristiques du sulfite de sodium, en spécifie les exigences ainsi que les méthodes d'analyse correspondantes. Elle donne des informations pour son emploi dans le traitement de l'eau.
Kemikalije, ki se uporabljajo za pripravo pitne vode - Natrijev sulfit
Ta evropski standard obravnava natrijev sulfit, ki se uporablja za pripravo pitne vode. Opisuje značilnosti natrijevega sulfita ter določa zahteve in ustrezne preskusne metode zanj. Standard podaja informacije za uporabo natrijevega sulfita pri pripravi vode.
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kemikalije, ki se uporabljajo za pripravo pitne vode - Natrijev sulfitProdukte zur Aufbereitung von Wasser für den menschlichen Gebrauch - NatriumsulfitProduits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Sulfite de sodiumChemicals used for treatment of water intended for human consumption - Sodium sulfite71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 12124:2012SIST EN 12124:2013en,fr,de01-april-2013SIST EN 12124:2013SLOVENSKI
STANDARDSIST EN 12124:20051DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12124
November 2012 ICS 71.100.80 Supersedes EN 12124:2005English Version
Chemicals used for treatment of water intended for human consumption - Sodium sulfite
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Sulfite de sodium
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Natriumsulfit 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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
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Avenue Marnix 17,
B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12124:2012: ESIST EN 12124:2013
General information on sodium sulfite . 15Bibliography . 17 SIST EN 12124:2013
7757-83-7. 3.1.7 EINECS reference 2)
231-821-4. 3.2 Commercial form The product is a crystalline powder. 3.3 Physical properties 3.3.1 Appearance and odour The product is a white, fine crystalline, odourless powder. 3.3.2 Density The density of the product is 2,63 g/cm³ at 20 °C. The bulk density is 1,2 g/cm³ to 1,5 g/cm³ at 20 °C. 3.3.3 Solubility in water The solubility of the product in water is 250 g/l at 20 °C. 3.3.4 Vapour pressure Not applicable. 3.3.5 Boiling point at 100 kPa 3)
The product decomposes above 230 °C. 3.3.6 Crystallisation point See 3.3.5. 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 12124:2013
Table 1 — Chemical parameters
Parameter Limit mg/kg of commercial product Antimony (Sb) max 2 Arsenic (As) max 1 Cadmium (Cd) max 1 Chromium (Cr) max 1 Lead (Pb) max 2 Mercury (Hg) max 0,5 Nickel (Ni) max 1 Selenium (Se) max 1 NOTE Pesticides and polycyclic aromatic hydrocarbons and cyanides ( CN- ) are not relevant in sodium sulfite because the raw materials used in the manufacturing are free of them. For parametric values of sodium sulfite 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. 5.2 Analyses 5.2.1 Main product The sodium sulfite content shall be determined in accordance with ISO 418. NOTE Both methods, direct titration and back titration, can be used. 5.2.2 Impurities 5.2.2.1 Sulfate The content of sodium sulfate (Na2SO4) shall be determined in accordance with ISO 22743. SIST EN 12124:2013
AAS 193,7 n.a. Sb see 5.2.3.3 Hydride
AAS 217,6 n.a. Cd ISO 6353-1 GM 29see 5.2.3.2 AAS 228,8 air-acetylene Cr ISO 6353-1 GM 29see 5.2.3.2 AAS 357,8 air-acetylene Pb ISO 6353-1 GM 29see 5.2.3.2 AAS 217,0 or 283,3 air-acetylene Ni ISO 6353-1 GM 29see 5.2.3.2 AAS 232,0 oxidising acetylene-air Se see 5.2.3.3 Hydride
AAS 196,0 n.a. Hg in accordance withISO 5993 flameless
AAS 253,6 n.a. AAS = Atomic Absorption Spectroscopy. n.a. = not applicable.
5.2.3.2 Determination of cadmium (Cd), chromium (Cr), lead (Pb) and nickel (Ni) 5.2.3.2.1 Principle The elements cadmium (Cd), chromium (Cr), lead (Pb) and nickel (Ni) are determined using atomic absorption spectrometry with the standard additions technique. 5.2.3.2.2 Reagents All reagents shall be of a recognised analytical grade and the water used shall conform to the grade 3 specified in EN ISO 3696. SIST EN 12124:2013
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