Pyrolysis-field ionization mass spectrometry of extracts separated from a gas coal and its macerals using N-methyl-2-pyrrolidinone

Abstract

The characterization by pyrolysis-field ionization mass spectrometry (Py-FIMS) of the N-methyl-2-pyrrolidinone (NMP) extracts of several coals (gas coal, flame coal, orthocoking coal) has recently been described. This study is now extended to the NMP extracts of the macerals, i.e., vitrinite, exinite, and inertinite, after separation from the gas coal sample. The Py-FI mass spectrum of the original gas coal is also reported. The contribution of each maceral to the extractible phase was estimated from the petrographic analysis and from the yields of NMP extraction