Standard

ISO 4284:1993

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Résumé

The principle of the method specified is digestion of a test portion in a sealed apparatus in a mixture of hydrochloric acid, tin(II) chloride and boric acid solutions, absorption of the liberated hydrogen sulfide, entrained in a stream of oxygen-free argon or nitrogen, in zinc acetate solution and iodometric determination of the zinc sulfide formed. The method is applicable to products having a sulfide content equal to or greater than 0,001 % (m/m). It is not applicable, if presence of polysulfides is suspected.

Spécifications des produits

  • Standard de ISO
  • Publié:
  • Radié:
  • Délai d' objection - Expire:
  • Version: 3
  • Type de document: IS
  • Pages
  • Editeur: ISO
  • Distributeur: ISO
  • ICS: 73.080
  • Comité international: ISO/TC 175

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