Group-type characterisation of mineral oil samples by two-dimensional comprehensive normal-phase liquid chromatography-gas chromatography with time-of-flight mass spectrometric detection.
Normal-phase liquid chromatography (NPLC) and capillary gas chromatography (GC) are complementary techniques, which makes them ideally suited for hyphenated and comprehensive coupling. In this work, an LC and a GC equipped with a time-of-flight mass spectrometer were on-line and comprehensively coupled (LC x GC-ToF MS) for the analysis of mineral oil samples. Classes of compounds present in the oil like paraffins, mono-aromatic and multi-aromatic compounds were separated by normal-phase LC. with a subsequent boiling-point separation within each class by means of GC. Sub-groups present in each class of compounds were distinguished by selecting their unique masses.
de Koning
Sjaak
S
LECO Instrumente, Separation Science Group, Marie-Bernays-Ring 31, 41199 Mönchengladbach, Germany. sjaak.dekoning@leco.de
Janssen
Hans-Gerd
HG
Brinkman
Udo A Th
UA
D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D008899:Mineral Oil / Q000737:chemistry*
D008899:Mineral Oil