ISO 2866:1974
ISO 2866:1974

Status : Withdrawn


Gives the potentiometric and visual methods als alternatives for the final titration. The principle consists in the combustion of the sulphur in a current of oxygen. Oxidation and fixation of the sulphur dioxide and trioxide gases in chromic and sulphuric acid solutions. Absorption of the carbon dioxide formed in a solution of barium hydroxide, followed by titration in the presence of phenolphthalein and screened methylorange (by xylene cyanol FF) as indicator. Has also been approved by the IUPAC.

General information

  •  : Withdrawn
     : 1974-11
    : Withdrawal of International Standard [95.99]
  •  : 1
     : 5
  • ISO/TC 47
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