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


Document Number: ISO 3425:1975
File Size: 217 kB
Language: English
Provider: ANSI
Shipping: Available for download - Link will be provided in My ComplianceOnline section

Price: $37.00
Product Details

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

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