Abstract
Normal and reversed phase column combinations for comprehensive two-dimensional gas chromatography time-of-flight mass spectrometry were evaluated concerning their suitability for the analysis of common commercial available middle distillates. Compound classes were identified and quantified by applying a previously developed data evaluation method (Jennerwein et al., 2014) [1] for middle distillates based on GC × GC-TOFMS using “normal phase” column combination and Visual Basic Scripting (VBS). The GC × GC-TOFMS methodology was transferred to a “reversed phase” column combination and it could be found, that this kind of column combination provides advantages for the quantification of petrochemical samples in terms of precision of the results. Special improvements were observed for the quantification of aromatics and paraffins.
Highlights
Since the introduction of comprehensive two-dimensional gas chromatography in analytical chemistry a rapid development of the underlying hardware and software took place
The presented study focuses on a modification of this normal-phase approach, which was already applied by the author in an earlier study for the analysis of the aromatic fraction within middle distillates [14]
Diesel fuel on normal phase column combination: The principle of a complete quantitative group-type analysis of middle distillates using GC×GC-TOFMS and Visual Basic Scripting has been published in detail recently [1]
Summary
Normal and reversed phase column combinations for comprehensive two-dimensional gas chromatography time-of -flight mass spectrometry were evaluated concerning their suitability for the analysis of common commercial available middle distillates. Compound classes were identified and quantified by applying a previously developed data evaluation method [1] for middle distillates based on GC×GC-TOFMS using "normal phase" column combination and Visual Basic Scripting (VBS). The GC×GC-TOFMS methodology was transferred to a "reversed phase" column combination and it could be found that this kind of column combination provides advantages for the quantification of petrochemical samples in terms of precision of the results. Special improvements were observed for the quantification for aromatics and paraffin
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