Analysis of Long-Side-Chain Alkylaromatics in Crude Oil for Evaluation of Their Fate in the Environment

摘要: It has long been believed that the n-hexane fraction of crude oil only contains saturates. However, we found one-third its content was aromatics with alkyl side chains and these could be separated from saturates by preparative thin-layer chromatography. The alkylaromatic characterized UV-visible, NMR mass spectrometries. A gas chromatographic-mass spectrometric analysis showed presence a homologous series long-side-chain n-alkylaromatics, namely mono-, di-, tri-n-alkylbenzenes in C7-C27 range (the subscript to C indicates total number carbon atoms chain) di- tri-n-alkylbenzothiophenes C3-C22 range. biodegradation components natural bacterial population seawater their photooxidation artificial sunlight were investigated. n-alkylbenzenes quite susceptible but resistant photooxidation, whereas n-alkylbenzothiophenes almost completely photooxidized substantially biodegraded.