NS 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