Method for the determination of elemental sulphur in bitumen

✍ Scribed by Latif H. Ali

• Publisher: Elsevier Science
• Year: 1975
• Tongue: English
• Weight: 330 KB
• Volume: 54
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(75)90036-8

✦ Synopsis

of

The absorption in the range X = 262 nm (in cyclohexane) of elemental sulphur (S,/) , added to bitumen extracted from the Athabasca tar sands, at concentrations ranging from 0.2 to 4-O%, was used to determine its concentration with a reasonable accuracy. The selective concentration of S,, in a small fraction of the total bitumen was accomplished by chromatography on charcoal, eluting with a light naphtha. The concentration of Sd in the naphtha-soluble fraction (NSF) of bitumen was determined by the reduction in the absorption at X = 262 nm obtained before and after extracting this fraction with a 30% aqueous sodium sulphide solution and by the use of a preconstructed calibration curve.