ISO 6228:1980
ISO 6228:1980

Status : Published (Under review)

This standard was last reviewed and confirmed in 2022. Therefore this version remains current.
Format Language
std 1 63 PDF
std 2 63 Paper
  • CHF63
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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.

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General information

  •  : Published
     : 1980-11
    : International Standard confirmed [90.93]
  •  : 1
     : 7
  • ISO/TC 47
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