Journal Highlight: Analysis of soluble components in coals and interpretations for the complex mass spectra

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  • Published: Mar 13, 2017
  • Author: spectroscopyNOW
  • Channels: Base Peak
thumbnail image: Journal Highlight: Analysis of soluble components in coals and interpretations for the complex mass spectra

Soluble products from the thermal dissolution of Chinese coals have been analyzed by LC/MS, revealing the distributions of isomers to describe the content inequality of organic species within the same class of coal molecules.

Analysis of soluble components in coals and interpretations for the complex mass spectra

Rapid Communications in Mass Spectrometry, 2017, 31, 503-508
Xing Fan, Ya-Ru Yu, Jun-Liu Xia, Yun-Peng Zhao, Jing-Pei Cao, Yao Lu, Xiao-Ming Yue, Teng-Gao Zhu, Xian-Yong Wei and Jin-Li Lu

Abstract: The deduction of useful information from the mass spectra of a complex mixture like coals remains difficult, which limits the clean and efficient utilization of coals. It is necessary to explore the data interpretation methods for mass spectra and visualize the analytical data of coals for industrial utilization such as feedstock selection. Coal sample and methanol were mixed and heated to 310 °C and kept at that temperature for 2 h. The solvent was under supercritical state at 310 °C and the solubility for the solid mixture increased. Soluble products from thermal dissolution of two Chinese coals were analyzed by high-performance liquid chromatography/atmospheric pressure chemical ionization orbitrap mass spectrometry. The iso-abundance plot for molecules in coals was upgraded to display the distributions of isomers which are indicated as concentric circles or triangles with the same carbon number and value of double-bond equivalent. The concentration ratio was introduced from economics to describe the content inequality of organic species within the same class of coal molecules. Interpretation methods for mass spectra visualize and simplify the understanding of complex components in coals for industrial utilization. Coals with a high concentration ratio for a specific class should take priority as a feedstock for chemicals and receive more attention.

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