International Standard
ISO 4262:1993
Petroleum products — Determination of carbon residue — Ramsbottom method
Reference number
ISO 4262:1993
ISO 4262:1993
Edition 2
1993-09
1993-09
© ISO 2024
International Standard
p
ISO 4262:1993
20777
Published
(Edition 2, 1993)
This standard was last reviewed and confirmed in 2019.
Therefore this version remains current.
Abstract
The principle of the method specified is weighing a test portion into a glass coking bulb having a capillary opening and placing it in a metal furnace maintained at a temperature of approximately 550 °C, thus quickly heating the test portion to the point at which all volatile matter is evaporated out of the bulb, while the heavier residue remaining in the bulb undergoes cracking and coking reactions during a specified heating period, removing the bulb, cooling it in a desiccator and weighing again. The method may be used to determine amounts of carbon residues in the range of 0,01 % (m/m) to 30,0 % (m/m), left after evaporation and pyrolysis.
Life cycle
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Previously
WithdrawnISO 4262:1978
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Now
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