Ionizing Aromatic Compounds in Petroleum by Electrospray with HCOONH4 as Ionization Promoter

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• 作者：Jincheng Lu ; Yahe Zhang ; Quan Shi
• 刊名：Analytical Chemistry
• 出版年：2016
• 出版时间：April 5, 2016
• 年：2016
• 卷：88
• 期：7
• 页码：3471-3475
• 全文大小：372K
• ISSN：1520-6882

文摘

Electrospray ionization (ESI) coupled with Fourier ion cyclotron resonance mass spectrometry (FTICR MS) has been successfully used for molecular characterization of petroleum. However, ESI can not ionize nonpolar components which generally are dominant in the petroleum fraction. Here, we introduce a novel approach for aromatic compounds molecular characterization. Aromatics in petroleum fractions were ionized to [M + H]⁺ by positive-ion ESI with HCOONH₄ as an ionization promoter, and when ESI is combined with high resolution FTICR MS, aromatic hydrocarbons and heteroatoms in petroleum fractions can be simultaneously analyzed. The method is easily available and has potential for the characterization of aromatic compounds in any other matrix.