Wang Shanshan, Yang Chenchen, Zhao Junteng, Li Chenyao, Fan Xinhao
College of Science, Chang'an University, Xi'an, Shaanxi 710064, China.
Shaanxi Coal Chemical Industry Technology Research Institute Co., Ltd., Xi'an, Shaanxi 710064, China.
ACS Omega. 2023 Mar 29;8(14):12968-12979. doi: 10.1021/acsomega.3c00163. eCollection 2023 Apr 11.
Due to the complicacy of asphalt fumes, the analytical methods for investigating volatile organic compounds (VOCs) are very limited. In this study, a direct and real-time analysis method based on carbon fiber ionization mass spectrometry (CFI-MS), an ambient mass spectrometric technique, was established and successfully applied in the analysis of asphalt VOCs. The asphalt VOCs can be directly detected in the open atmosphere without the collection step of asphalt fumes, and the mass spectra of one asphalt sample can be obtained in a few seconds in both positive and negative ion modes. By investigating the mass spectral changes of asphalt fumes at different heating temperatures ranging from 50 to 200 °C, the temperature factor of asphalt fume emission was demonstrated in this work. The research results demonstrate that the complexity of asphalt fumes is positively related to the applied temperature. Moreover, the VOCs of saturates, aromatics, resins, and asphaltenes fractions were also analyzed by the direct analysis method. The result shows that aromatics contribute most to the emission of VOCs. In addition, the obtained mass spectra combined with the principal component analysis method show the great potential to quickly screen VOC inhibitors of asphalt materials.
由于沥青烟气的复杂性，用于研究挥发性有机化合物（VOCs）的分析方法非常有限。在本研究中，基于碳纤维电离质谱（CFI-MS）这一环境质谱技术，建立了一种直接实时分析方法，并成功应用于沥青挥发性有机化合物的分析。无需对沥青烟气进行采集步骤，即可在开放大气中直接检测沥青挥发性有机化合物，并且在正离子和负离子模式下，几秒内就能获得一个沥青样品的质谱图。通过研究50至200°C不同加热温度下沥青烟气的质谱变化，在本工作中证明了沥青烟气排放的温度因素。研究结果表明，沥青烟气的复杂性与所施加的温度呈正相关。此外，还通过直接分析方法对饱和烃、芳烃、树脂和沥青质馏分的挥发性有机化合物进行了分析。结果表明，芳烃对挥发性有机化合物的排放贡献最大。此外，所获得的质谱图结合主成分分析方法显示出快速筛选沥青材料挥发性有机化合物抑制剂的巨大潜力。
