International Standard
ISO 3425:1975
Sulphur for industrial use — Determination of ash at 850-900 degrees C and of residue at 200 degrees C
Reference number
ISO 3425:1975
Edition 1
1975-10
International Standard
Read sample
ISO 3425:1975
8741
Published (Edition 1, 1975)
This standard was last reviewed and confirmed in 2019. Therefore this version remains current.

ISO 3425:1975

ISO 3425:1975
8741
Language
Format
CHF 42
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Abstract

Application to products containing at least 98 % of elemental sulphur, expressed as a percentage by mass, of the product dried at 80 °C for 2 h. The difference between the ash and the residue corresponds to the "non-volatile bituminous matter" content at 200 °C. The principle of ashing consists in slow combustion in air of a test portion of the dried product. Heating in a furnace, controlled at 850 °C to 900 °C, and weighing. The determination of non-volatile matter is carried out by slow evaporation in a furnace, controlled at (200 10) °C, in a flow of nitrogen, of the volatile matter and the sulphur. Weighing of the residue after about 10 h.

General information

  •  : Published
     : 1975-10
    : International Standard confirmed [90.93]
  •  : 1
     : 2
  • ISO/TC 47
    71.060.10 
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