ISO 3425:1975
ISO 3425:1975 Sulphur for industrial use – Determination of ash at 850-900 degrees C and of residue at 200 degrees C
CDN $82.00
Description
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.
Edition
1
Published Date
1975-10-01
Status
PUBLISHED
Pages
2
Language
English
Format
Secure PDF
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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.
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