Reference number
ISO 7099:1983
© ISO 2024
ISO 7099:1983
Phosphoric acid for industrial use (including foodstuffs) — Determination of hydrogen sulfide content — Titrimetric method
Edition 1
1983-10
Withdrawn
Withdrawn (Edition 1, 1983)

Abstract

The hydrogen sulphide in a test portion is removed in a stream of nitrogen and absorbed in a solution of sodiumhydroxide in aqueous acetone. the sulphide ions are titrated with standard volumetric mercury(II) acetate solution, in the presence of 1,5-diphenylthiocarbazone (dithizone) as indicator. The method is applicable to products having hydrogen sulfide contents greater than or equal to 0.05 mg/kg.

General information

  • Status
     : Withdrawn
    Publication date
     : 1983-10
    Stage
    : Withdrawal of International Standard [95.99]
  • Edition
     : 1
    Number of pages
     : 4
  • Technical Committee :
    ISO/TC 47
  • RSS updates

Life cycle

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