ISO 4284:1993
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ISO 4284:1993
10129

Abstract 

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.


General information 

  •  :  Withdrawn
     : 1993-01
  •  : 3
     : 4
  •  : ISO/TC 175 Fluorspar
  •  :
    73.080 Non-metalliferous minerals

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