EN 12121:2012
(Main)Chemicals used for treatment of water intended for human consumption - Sodium disulfite
Chemicals used for treatment of water intended for human consumption - Sodium disulfite
This European Standard is applicable to sodium disulfite used for treatment of water intended for human consumption. It describes the characteristics of sodium disulfite and specifies the requirements and the corresponding test methods for sodium disulfite. It gives information on its use in water treatment. It also determines the rules relating to safe handling and use (see Annex B).
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Natriumdisulfit
Diese Europäische Norm gilt für Natriumdisulfit zur Aufbereitung von Wasser für den menschlichen Gebrauch. Sie beschreibt die Eigenschaften von Natriumdisulfit und legt die Anforderungen sowie die entsprechenden Prüfverfahren für Natriumdisulfit fest. Sie enthält Angaben zu dessen Anwendung in der Wasseraufbereitung. Sie legt darüber hinaus Regeln für die sichere Handhabung und Verwendung fest (siehe Anhang B).
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Disulfite de sodium
La présente Norme européenne est applicable au disulfite de sodium utilisé pour le traitement de l'eau destinée à la consommation humaine. Elle décrit les caractéristiques du disulfite de sodium et spécifie les exigences et les méthodes d'essai correspondant au disulfite de sodium. Elle donne des informations pour son emploi dans le traitement de l'eau. Elle fixe également les règles relatives à la sécurité d'emploi et de manipulation (voir Annexe B).
Kemikalije, ki se uporabljajo za pripravo pitne vode - Natrijev disulfit
Ta evropski standard obravnava natrijev disulfit, ki se uporablja za pripravo pitne vode. Opisuje značilnosti natrijevega disulfita ter določa zahteve in ustrezne preskusne metode zanj. Standard podaja informacije o uporabi natrijevega disulfita pri pripravi vode. Določa tudi pravila za varno ravnanje in uporabo (glej dodatek B).
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 disulfitProdukte zur Aufbereitung von Wasser für den menschlichen Gebrauch - NatriumdisulfitProduits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Disulfite de sodiumChemicals used for treatment of water intended for human consumption - Sodium disulfite71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 12121:2012SIST EN 12121:2013en,fr,de01-april-2013SIST EN 12121:2013SLOVENSKI
STANDARDSIST EN 12121:20051DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12121
November 2012 ICS 71.100.80 Supersedes EN 12121:2005English Version
Chemicals used for treatment of water intended for human consumption - Sodium disulfite
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Disulfite de sodium Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Natriumdisulfit 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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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 12121:2012: ESIST EN 12121:2013
General information on sodium disulfite . 17Annex B (normative)
General rules relating to safety . 18Bibliography . 19 SIST EN 12121:2013
Not applicable. 3.3.6 Crystallisation point The product decomposes above 150 °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 12121:2013
mg/kg of commercial product Antimony (Sb) max 1 Arsenic (As) max 1 Cadmium (Cd) max 1 Chromium (Cr) max 1 Lead (Pb) max 5 Mercury (Hg) max 1 Nickel (Ni) max 1 Selenium (Se) max 1 NOTE Other chemical parameters and indicator parameters are not relevant in sodium disulfite because the raw materials used in the manufacturing process are free of them. For parametric values of sodium disulfite 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 General All reagents shall be of a recognised analytical grade and the water used shall conform to the grade 3 specified in EN ISO 3696. 5.2.2 Main product 5.2.2.1 General The sodium disulfite content shall be determined by the method for potassium disulfite described in ISO 3629.
(i.e. 47,6) X the conversion factor for millilitres to litres (i.e. 0,001) X 100 (for percentage); 100 is the volume, in millilitres of iodine solution added for total oxidation. 5.2.3 Impurities 5.2.3.1 Sulfate The sulfate content shall be determined in accordance with ISO 22743. 5.2.3.2 Chloride The chloride content shall be determined in accordance with ISO 9297. 5.2.4 Chemical parameters 5.2.4.1 General The content of chemical parameters shall be determined using the procedures specified in Table 2. SIST EN 12121:2013
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