title: Microwave-assisted extraction of polycyclic aromatic compounds from coal.
abstract: Microwave-assisted extraction (MAE) of polycyclic aromatic compounds (PACs) from coal is shown to give the same pattern of compounds as Soxhlet extraction. MAE requires only 10 mL solvent and 10 min extraction time whereas Soxhlet uses 200 mL and takes 24 h. Although the yields were lower, dichloromethane (DCM) was preferred to pyridine, N-methyl-2-pyrrolidone (NMP), and NMP with CS2 because the pattern of the PACs is shown to be independent of solvent and DCM is a much more convenient solvent to work with.
authors.affiliation: Department of Analytical Chemistry, University of Münster, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Kerst
authors.forename: J T
authors.initials: JT
authors.lastname: Andersson
mesh_terms: D002849:Chromatography, Gas / Q000379:methods*; D003031:Coal / Q000032:analysis*; D008872:Microwaves; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D015203:Reproducibility of Results
chemical_list: D003031:Coal; D011084:Polycyclic Aromatic Hydrocarbons