A test of the MALDI-MS calibration of SEC with N-methyl-2-pyrrolidinone for coal derived materials

• Published in: Fuel (Guildford) Vol. 77; no. 14; pp. 1527 - 1531
• Main Authors: Johnson, Barry R, Bartle, Keith D, Cocksedge, Mike, Herod, Alan A, Kandiyoti, Rafael
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01-11-1998; Elsevier
• Subjects: Applied sciences; coal derived material; Energy; Exact sciences and technology; Fuel processing. Carbochemistry and petrochemistry; Fuels; gasifier products; MALDI-MS; molecular mass distribution; SEC; Solid fuel processing (coal, coke, brown coal, peat, wood, etc.); SEC; MALDI-MS; molecular mass distribution; gasifier products; coal derived material; Solvents; Coal liquids; Liquefaction; Coal; Calibration; Molecular weight; Gel permeation chromatography
• ISSN: 0016-2361; 1873-7153
• DOI: 10.1016/S0016-2361(98)00084-2

In this paper we test our proposed methodology for a calibration procedure for mass determination by size exclusion chromatography. A sample is coarsely fractionated on column and when the fractions are examined by matrix assisted laser desorption–ionisation mass spectrometry a direct variation of molecular mass with retention is found. Importantly the chromatograms produced when using
N-methyl-2-pyrrolidinone as eluant are found to be free from solute association effects over a wide range of concentrations. The examination of a gasifier char is presented as a unique application of this chromatographic system.