he composition of coal pitch is extremely complex

which contains polycyclic aromatic hydrocarbons with large molecular weight and their oxidation products.The coal pitch obtained from different coal raw material sources and production processes vary greatly in terms of aromatization degree

composition

property

molecular structure

etc.In this paper

gas chromatography mass spectrometry(GC-MS)

pyrolysis/gas chromatography mass spectrometry(Py/GC-MS) and high performance liquid chromatography(HPLC) were used to develop a universal

stable and simple analytical method for the construction of coal asphalt fingerprint library.In the development of GC-MS method

the HP-5MS column was used

and the method was established under a linear temperature gradient.A chromatogram for 33 components was obtain by this method

which had good stability for different samples.The Py/GC-MS method was used to investigate the changes in component structure and composition at higher temperatures

which may be used for a reference for the processing and aging research of asphalt products.In the development of the HPLC method

the most commonly used C18 column reversed phase chromatographic separation mode was adopted

which was established with methanol and water as mobile phases under linear gradient conditions.The developed method could be used to obtain stable chromatographic peaks for 41 components in different samples.Based on the methods above

a fingerprint spectrum library for coal pitch could be established

which provides theoretical basis data for further improving the evaluation on coal pitch and developing new uses of coal pitch.