Computerized GC/MS detection of monoaromatic and triaromatic steroid hydrocarbons in Alamein crude oil

✍ Scribed by Barakat, Assem O.

• Book ID: 102353454
• Publisher: John Wiley and Sons
• Year: 1994
• Tongue: English
• Weight: 433 KB
• Volume: 17
• Category: Article
• ISSN: 0935-6304
• DOI: 10.1002/jhrc.1240170708

✦ Synopsis

Abstract

Series of C‐ring monoaromatic steroid hydrocarbons (C~21~, C~22~, C~27~  C~29~) and triaromatic steroid hydrocarbons (C~20~, C~21~, C~26~  C~28~) have been recognized in the aromatic hydrocarbon fraction of Alamein crude oil from the western desert, Egypt. Detection of these compounds were based on mass fragmentography of the key ions m/z 253 and m/z 231 and comparison of the mass spectra and relative retention times with literature data. The predominance of the C~29~ monoaromatic steroids and C~28~ triaromatic steroids provide further evidence for a land plant origin of Alamein oil. The results substantiate previous evidence of the occurrence of an aromatization process with increasing maturation and indicate a moderate maturity level for Alamein oil.