Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) has been widely
used as a major breakthrough to investigate the structure of asphaltenes in heavy oils. In this …

Petroleum asphaltene is a complex natural organic mixture which plays a crucial role in the
refining processes. In this work, asphaltenes derived from petroleum vacuum residue and its …

Using heptane, toluene, and tetrahydrofuran (THF) as eluant, asphaltenes were fractionated
into five fractions based on their polarity and solubility. The molecular composition of polar …

In this work, six petroleum asphaltene samples of different geographical origins were
studied using atmospheric pressure chemical ionization (APCI) in positive-ion mode in a …

Due to advances in mass spectrometry, it is widely accepted that asphaltenes molecules
from the island and archipelago motifs coexist in the samples. However, analyzing …

The advanced characterization of asphaltenes has been extensive and fruitful during the last
two decades but with many gaps. Despite the efforts to reveal the molecular architectures …

Asphaltenes are still problematic fractions and their composition is not fully unveiled as it
relates to the original crude oil and the precipitation method. In this work, the composition of …

Advances in high-resolution Fourier transform ion cyclotron resonance mass spectrometry
(FT-ICR MS) enable molecular-level characterization of ultracomplex asphaltene samples …

Despite extensive research, the molecular-level chemical characterization of asphaltenes, a
highly aromatic solubility fraction of petroleum, remains an analytical challenge. This fraction …

Asphaltenes are known for causing flow assurance problems in numerous oil fields. In this
study we present a comparative spectroscopic analysis of Xinjiang heavy oil asphaltenes as …