EN 12120:2012
(Main)Chemicals used for treatment of water intended for human consumption - Sodium hydrogen sulfite
Chemicals used for treatment of water intended for human consumption - Sodium hydrogen sulfite
This European Standard is applicable to sodium hydrogen sulfite used for treatment of water intended for human consumption. It describes the characteristics of sodium hydrogen sulfite and specifies the requirements and the corresponding test methods for sodium hydrogen sulfite. It gives information on its use in water treatment.
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Natriumhydrogensulfit
Diese Europäische Norm gilt für Natriumhydrogensulfit zur Aufbereitung von Wasser für den menschlichen Gebrauch. Sie beschreibt die Eigenschaften von Natriumhydrogensulfit und legt die Anforderungen sowie die entsprechenden Prüfverfahren für Natriumhydrogensulfit fest. Sie enthält Angaben zu dessen Anwendung in der Wasseraufbereitung.
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Hydrogénosulfite de sodium
La présente Norme européenne est applicable à l'hydrogénosulfite de sodium utilisé pour le traitement de l'eau destinée à la consommation humaine. Elle décrit les caractéristiques de l'hydrogénosulfite de sodium et spécifie les exigences et les méthodes d'essai correspondant à l'hydrogénosulfite de sodium. Elle donne des informations pour son emploi dans le traitement de l'eau.
Kemikalije, ki se uporabljajo za pripravo pitne vode - Natrijev hidrogen sulfit
Ta dokument obravnava natrijev hidrogen sulfit, ki se uporablja za pripravo pitne vode. Opisuje značilnosti natrijevega hidrogen sulfita ter določa zahteve in ustrezne preskusne metode zanj. Standard podaja informacije o uporabi natrijevega hidrogen sulfita pri pripravi vode.
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kemikalije, ki se uporabljajo za pripravo pitne vode - Natrijev hidrogen sulfitProdukte zur Aufbereitung von Wasser für den menschlichen Gebrauch - NatriumhydrogensulfitProduits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Hydrogénosulfite de sodiumChemicals used for treatment of water intended for human consumption - Sodium hydrogen sulfite71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 12120:2012SIST EN 12120:2013en,fr,de01-april-2013SIST EN 12120:2013SLOVENSKI
STANDARDSIST EN 12120:20051DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12120
November 2012 ICS 71.100.80 Supersedes EN 12120:2005English Version
Chemicals used for treatment of water intended for human consumption - Sodium hydrogen sulfite
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Hydrogénosulfite de sodium
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Natriumhydrogensulfit 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 12120:2012: ESIST EN 12120:2013
Page Foreword . 3Introduction . 41Scope . 52Normative references . 53Description . 54Purity criteria . 75Test methods . 86Labelling — Transportation — Storage . 15Annex A (informative)
General information on sodium hydrogen sulfite . 17Bibliography . 19 SIST EN 12120:2013
2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN ISO 3696, Water for analytical laboratory use — Specification and test methods (ISO 3696) ISO 418, Photography — Processing chemicals — Specifications for anhydrous sodium sulfite ISO 3165, Sampling of chemical products for industrial use — Safety in sampling ISO 5993, Sodium hydroxide for industrial use — Determination of mercury content — Flameless atomic absorption spectrometric method ISO 6206, Chemical products for industrial use — Sampling — Vocabulary ISO 6353-1, Reagents for chemical analysis — Part 1: General test methods ISO 9297, Water quality — Determination of chloride — Silver nitrate titration with chromate indicator (Mohr's method) ISO 22743, Water quality — Determination of sulphates — Method by continuous flow analysis (CFA) 3 Description 3.1 Identification 3.1.1 Chemical name Sodium hydrogen sulfite. 3.1.2 Synonym or commons name Sodium bisulfite. 3.1.3 Relative molecular mass 104,6. 3.1.4 Empirical formula NaHSO3. SIST EN 12120:2013
The product decomposes at 100 °C.
3.3.6 Crystallisation point A solution of mass fraction of 40 % NaHSO3 crystallises at 2 °C. 3.3.7 Specific heat The specific heat of the product is 3,15 kJ/(kg K).
1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances.
3) 100 kPa = 1 bar. SIST EN 12120:2013
mg/kg of commercial product (mass fraction of 40 % NaHSO3) 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 hydrogen sulfite because the raw materials used in the manufacturing process are free of them. For parametric values of sodium hydrogen sulfite on trace metal content in drinking water, see [1]. 5 Test methods 5.1 Sampling 5.1.1 General Observe the general recommendations of ISO 3165 and take account of ISO 6206. 5.1.2 Sampling from drums and bottles 5.1.2.1 General 5.1.2.1.1 Mix the contents of each container to be sampled by shaking the container, by rolling it or by rocking it from side to side, taking care not to damage the container or spill any of the liquid. 5.1.2.1.2 If the design of the container is such (for example, a narrow-necked bottle) that it is impracticable to use a sampling implement, take a sample by pouring after the contents have been thoroughly mixed. Otherwise, proceed as described in 5.1.2.1.3. SIST EN 12120:2013
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