Codes & Standards - Purchase

ISO 3425:1975

Sulphur for industrial use -- Determination of ash at 850-900 degrees C and of residue at 200 degrees C

SKU: iso_008741_102957 Published by ISO Publication Year 1975 1 Edition 2 pages

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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.

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GST REG No R119441681
QST REG No R1006017360

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Codes & Standards - Purchase

ISO 3425:1975

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