BS EN 973:2009 pdf free.Chemicals used for; treatment of water intended for human consumption — Sodium chloride for regeneration of ion exchangers.
BS EN 973 This European Standard is applicable to sodium chloride intended for use only in water treatment apparatus, for the regeneration of ion exchangers, intended for water for human consumption. It describes the characteristics and specifies the requirements and the corresponding test methods for sodium chloride. It gives information on its use in water treatment.
The following referenced documents are indispensable for the application of this document. 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 Iaboratoiy use – Specification and test methods (ISO 3696:1987)
ISO 2479, Sodium chloride for industrial use — Determination of matter insoluble in water or in acid and preparation of principal solutions for other determinations
ISO 2480, Sodium chloride for industrial use — Determination of sulphate content — Barium sulphate gravimetric method
ISO 2482, Sodium chloride for industrial use — Determination of calcium and magnesium contents — EDTA complexometric methods
ISO 2483, Sodium chloride for industrial use — Determination of the loss of mass at 110 °C ISO 3165, Sampling of chemical products for industrial use – Safety in sampling ISO 6206, Chemical products for industrial use — Sampling — Vocabulary
ISO 6227, Chemical products for industrial use — General method for determination of chloride ions — Potentiometric method
ISO 8213, Chemical products for industrial use — Sampling techniques — Solid chemical products in the form of particles varying from powders to coarse lumps.
Sodium chloride is stable, non-volatile and aqueous solutions have good electrical conductivity.
Sodium chloride is decomposed by a number of acids. It reacts with sulfuric acid, phosphoric acid and strong oxidizing agents. The reactions are often complex and require heat for completion.
This European Standard specifies the minimum purity requirements for sodium chloride for regeneration of ion exchangers used for the treatment of water intended for human consumption. Limits are given for impurities commonly present in the product. Depending on the raw material and the manufacturing process other impurities may be present and, if so, this shall be notified to the user and when necessary to relevant authorities.BS EN 973 pdf download.