Nuclear magnetic resonance (NMR) spectroscopy has emerged as a powerful analytical tool for the determination of heavy oils composition due to its rapidity, directness, and ease of analysis.

• 核磁共振谱图能够直接反映出碳、氢及杂原子所处的化学环境，且分析简便、快捷，从而成为沥青、渣油等重油的结构组成分析的有力工具。