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Citation: YU Ya-Ru, FAN Xing, ZHAO Yun-Peng, CAO Jing-Pei, KANG Shi-Gang, WEI Xian-Yong. Analysis of Soluble Organic Species of Huolinguole Lignite by Atmospheric Pressure Photoionization-Mass Spectrometry[J]. Chinese Journal of Analytical Chemistry, ;2017, 45(7): 1005-1011. doi: 10.11895/j.issn.0253-3820.160872 shu

Analysis of Soluble Organic Species of Huolinguole Lignite by Atmospheric Pressure Photoionization-Mass Spectrometry

1.
Key Laboratory of Coal Processing and Efficient Utilization, Ministry of Education, China University of Mining and Technology, Xuzhou 221116, China;
2.
School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, China

Received Date: 29 November 2016
Revised Date: 24 February 2017

Fund Project: This work was supported by the Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT) (No. IRT13054), National Natural Science Foundation of China (Grant 21676293), the Fund from Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation (East China Institute of Technology

Huolinguole lignite was sequentially extracted with carbon disulfide, ethyl acetate, methanol and acetone. All of the extracts were analyzed using a time-of-flight mass spectrometry (TOF-MS) equipped with an atmospheric pressure photoionization (APPI) ion source. Toluene or 1,4-difluorobenzene was chosen as dopant for APPI. The results indicated that both dopants could well ionize compounds which could not be ionized by APPI without dopant. Toluene induced higher ionization efficiency than 1,4-difluorobenzene. Some compounds in the extracts were identified as dimers, which might be formed via molecular association. Heteroatoms were identified in all of the associated molecules. Molecular weight distributions under three APPI ionization modes were similar. Compounds with molecular weight from 200 to 500 Da occupied 60% of all the products and around 10% of the products had molecular weight over 500 Da.
- Atmospheric pressure photoionization,
- Mass spectrometry,
- Dopant,
- Molecular association,
- Coal
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