ISO 6228:1980
ISO 6228:1980



Describes a method based on prior conversion of the sulphur compounds in a test portion to sulphate, if required, and reduction of the sulphate ions ti hydrogen sulphide by a mixture of hydriodic and phosphinic acids in the presence of hydrochloric acid. The hydrogen sulphide is entrained in a current of nitrogen and absorbed in a solution of sodium hydroxide in aqueous acetone, followed by titration of the sulphide ions with standard volumetric mercury(II) acetate or nitrate solution in the presence of 1,5-diphenyl-3-thiocarbazone (dithiozone) as indicator.

General information 

  •  : Published
     : 1980-11
  •  : 1
     : 7
  •  : ISO/TC 47 Chemistry
  •  :
    71.040.40 Chemical analysis

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