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ČESKÁ TECHNICKÁ NORMA |
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ICS 71.100.80 |
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Říjen 1998 |
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Chemické výrobky používané |
ČSN 75 5854 |
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Chemials used for treatment of water intended for human consumption - Phosphoric acid
Produits chimiques utilisés pour le traitement de ľeau destinée á la consommation humaine - Acide phosphorique
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Phosphorsaure
Tato norma přejímá anglickou verzi evropské normy EN 974:1997. Evropská norma EN 974:1997 má status české technické normy.
This standard implements the English version of the European Standard EN 974:1997. The European Standard EN 974:1997 has the status of a Czech Standard.
© Český normalizační institut, 1998
Podle zákona č. 22/1997 Sb. smějí být české technické normy rozmnožovány a rozšiřovány jen se souhlasem Českého normalizačního institutu.
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52829 |
Národní předmluva
Citované normy
EN ISO 3696 zavedena v ČSN ISO 3696 Jakost vody pro analytické účely - Specifikace a zkušební metody (68 4051)
ISO 3165 zavedena v ČSN ISO 3165 Odběr vzorků chemických výrobků technických - Bezpečnost při odběru vzorků (65 0105)
ISO 3706 dosud nezavedena
ISO 4285 dosud nezavedena
ISO 5993 dosud nezavedena
ISO 6206 dosud nezavedena
ISO 6353-1 zavedena v ČSN ISO 6353-1 Činidla pro chemické rozbory - Všeobecné zkušební metody (65 0315)
ISO 6353-2 zavedena v ČSN ISO 6353-2 Činidla pro chemické rozbory - Část 2: Specifikace - První řada (65 0315 v návrhu)
Vypracování normy
Zpracovatel: Hydroprojekt a.s.. Praha, IČO 4527 4576 Ing. Vladimír Beneš
Technická normalizační komise: TNK č. 94 Vodárenství, TNK č. 104 Jakost vod
Pracovník českého normalizačního institutu: Ing. Oldřich Čermák
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EUROPEAN STANDARD |
EN 974 |
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NORME EUROPÉENNE |
July 1997 |
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EUROPÄISCHE NORM |
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ICS 71.100.81
Descriptors: potable water, water treatment, chemical compounds, phosphoric acid, description, physical properties, chemical properties, impurities, toxic substances, tests, labelling, storage
English version
Chemicals used for treatment of water intended for human consumption - Phosphoric acid
Produits chimiques utilisés pour le traitement de ľeau destinée a la consommation humaine - Acide phosphorique
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Phosphorsäure
This European Standard was approved by CEN on 1997-07-05. 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 alternation.
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.
The European Standards exist 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, Czech Republik, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
CEN
European Committee for Standardization
Comité Européen de Normalisation
Europäisches Komitee für Normung
Central Secretariat: rue de Stassart, 36 B - 1050 Brussels
(C) 1997 CEN - All rights of exploitation in any form any by any means reserved worldwide for CEN national Members.
Ref. No. EN 974:1997 E
Obsah |
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strana |
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Contents |
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Page |
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Foreword |
3 |
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Introduction |
4 |
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1 |
Scope |
4 |
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2 |
Normative references |
4 |
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3 |
Description |
4 |
3.1 |
Identification |
5 |
3.2 |
Commercial forms |
5 |
3.3 |
Physical properties |
5 |
3.4 |
Chemical properties |
7 |
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4 |
Purity criteria |
7 |
4.1 |
Composition of commercial product |
7 |
4.2 |
Impurities and main by-products |
7 |
4.3 |
Toxic substances |
8 |
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5 |
Test methods |
8 |
5.1 |
Sampling |
8 |
5.2 |
Analyses |
9 |
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6 |
Labelling - Transportation - Storage |
14 |
6.1 |
Means of delivery |
14 |
6.2 |
Risk and safety labelling according to the EU Directives |
14 |
6.3 |
Transportation regulations and labelling |
14 |
6.4 |
Marking |
15 |
6.5 |
Storage |
15 |
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Annex A (informative) General information on phosphoric acid |
16 |
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Annex B (informative) Determination of concentration by measurement of density |
18 |
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Annex C (informative) Bibliography |
20 |
Foreword
This European Standard has been prepared by Technical Committee CEN/TC 164 „Water supply", the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 1998, and conflicting national standards shall be withdrawn at the latest by January 1998.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republik, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
Introduction
In respect of potential adverse effects on the quality of water intended for human consumption, caused by the product covered by this Standard:
1) this Standard provides no information as to whether the product may be used without restriction in any of the Member States of the EU or EFTA;
2) it should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulations concerning the use and/or characteristics of this product remain in force.
1 Scope
This European Standard is applicable to phosphoric acid used for treatment of water intended for human consumption. It describes the characteristics and specifies the requirements and the corresponding test methods for phosphoric acid. It gives information on its use in water treatment.
-- Vynechaný text --
Zdroj: www.cni.cz