NEN EN 973 : 2009

Foreword
1 Scope
2 Normative references
3 Description
  3.1 Identification
  3.2 Commercial forms
  3.3 Physical properties
  3.4 Chemical properties
4 Purity criteria
  4.1 Composition of commercial product
  4.2 Impurities and main by-products
  4.3 Chemical parameters
5 Test methods
  5.1 Sampling
  5.2 Analyses
6 Labelling - Transportation - Storage
  6.1 Means of delivery
  6.2 Risk and safety labelling in accordance with the EU
      directives
  6.3 Transportation regulations and labelling
  6.4 Marking
  6.5 Storage
Anenx A (informative) General information on sodium chloride
      A.1 Origin
      A.2 Use
      A.3 Rules for safe handling and use
      A.4 Emergency procedures
Annex B (normative) Analytical methods
      B.1 Determination of antimony, arsenic, cadmium, chromium,
          lead, nickel and selenium (inductively coupled plasma
          optical emission spectrometry (ICP/OES))
      B.2 Determination of total mercury (cold vapour atomic
          absorption spectrometry)
      B.3 Determination of water-soluble hexacyanoferrate (II)
          (molecular absorption spectrometry)
      B.4 Determination of potassium (Flame atomic absorption
          spectrometric method)
Annex C (informative) Determination of cadmium, chromium,
          nickel and lead (flame atomic absorption spectrometry)
      C.1 Determination of cadmium
      C.2 Determination of chromium
      C.3 Determination of nickel
      C.4 Determination of lead
Annex D (informative) Determination of arsenic, antimony
          and selenium (atomic absorption spectrometry hydride
          technique)
      D.1 General principle
      D.2 Interferences
      D.3 Reagents
      D.4 Apparatus
      D.5 Procedure
      D.6 Calculation

Explains the characteristics and specifies the requirements and the corresponding test methods for sodium chloride. It also provides information on its use in water treatment. Applies to sodium chloride intended for use only in water treatment apparatus, for the regeneration of ion exchangers, intended for water for human consumption.