The essence of chromatography

Borisova, L. V.; Demin, Yu. V.; Gatinskaya, N. G.; Ermakov, V. V.; Ryabukhin, V. A.; Bozhkov, Ognyan

doi:10.1007/s10809-005-0020-2

Cited by 77 publications

(116 citation statements)

References 3 publications

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“…Using a higher hydrogen flow rate can sometimes improve tailing [7]; however, statistical analysis of the experimental design results showed that in the present case, 2 A s was primarily dependent on air flow, and best 2 A s was achieved when air flow was maximum (100 mL/ min) ( Fig. 2; Table 2).…”

Section: Influence Of Npd Detector Flows On Peak Asymmetry (A S )mentioning

confidence: 64%

Studies on thermionic ionisation detection in comprehensive two‐dimensional gas chromatography

Ryan

Marriott²

2006

J of Separation Science

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Original Paper Studies on thermionic ionisation detection in comprehensive two-dimensional gas chromatographyThis study explores the application of specific thermionic ionisation detection in comprehensive 2-D GC (GC6GC) and represents the first report of GC6GC with nitrogen phosphorus detection (GC6GC-NPD). Of particular interest is the performance of the NPD with respect to peak parameters of asymmetry and sensitivity. Since GC6GC produces much narrower peaks than obtained with fast GC (e. g. 100 ms vs. a 1 s) the effect of detector response time and any lack of symmetry arising from the detection step is important if peak separation (resolution) is to be maintained. It was observed that detector gas flows had a significant impact on peak asymmetry and peak magnitude, and that optimisation of the detector was critical, particularly for complex sample analysis by GC6GC-NPD. Peak asymmetries ranging from A s = 1.8 to 8.0 were observed under different conditions of detector gas flows. Comparison of GC6GC-NPD with GC6GC-flame ionisation detection (FID) showed the former to be approximately 20 times more sensitive for the detection of nitrogen-containing methoxypyrazines analytes, and GC6GC-NPD had a larger linear detection range compared to GC6GC-FID. Furthermore, comparison of GC6GC-NPD and GC6GC-TOFMS chromatograms for the analysis of coffee headspace demonstrated the benefits of selective detection, ultimately realised in a comparatively simplified contour plot.

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Section: Influence Of Npd Detector Flows On Peak Asymmetry (A S )mentioning

confidence: 64%

Studies on thermionic ionisation detection in comprehensive two‐dimensional gas chromatography

Ryan

Marriott²

2006

J of Separation Science

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“…Ions are then directed to a collector electrode. NPD temperature and gas flow modification can reduce the peak tailing that often occurs because of the temporary adsorption of decomposition products on the ceramic bead (Poole, 2003). GC Â GC-NPD has been used for pesticide analysis (Khummueng et al, 2006) and for heavy gas oil samples (von Muehlen et al, 2007).…”

Section: Instrumentation and Fundamental Operational Parameters 415mentioning

confidence: 99%

Theory and Practice of UHPLC and UHPLC–MS

Guillarme

Veuthey

2017

Handbook of Advanced Chromatography /Mass Spectrometry Techniques

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“…13 Solute retention in the column, and also their resolution, are a consequence of the solution and dissolution process of the solute molecules inside and outside the stationary liquid phase. When considering the average gas linear velocity as a constant throughout an analysis, the solutes should spend an identical period of time in the mobile phase to elute from the column.…”

Section: Principles Of Gas Chromatographic Retention Parametersmentioning

confidence: 99%

Linear retention indices in gas chromatographic analysis: a review

Zellner

Bicchi

Dugo

et al. 2008

Flavour & Fragrance J

211

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ABSTRACT:The main purpose of any chromatographic analysis is to resolve mixtures of compounds into less complex mixtures or ultimately into pure components. In addition to this function, the chromatographic system can provide retention data which serve as complementary information for the positive identification of resolved components. The need to express gas chromatographic retention data in a standardized system has long been recognized and retention index values presented to be a valuable parameter. Those values are mainly calculated by applying the equations proposed by Kováts, for isothermal analysis, and van den Dool and Kratz, for programmed gas chromatographic runs. In general, these indices denote the retention behaviour of the compounds of interest according to a uniform scale determined by a series of closely related standard substances. The use of retention indices in the flavour and fragrance field is well-documented, and they are widely applied for the comparison of results between laboratories, as well as to characterize stationary phases.

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The essence of chromatography

Cited by 77 publications

References 3 publications

Studies on thermionic ionisation detection in comprehensive two‐dimensional gas chromatography

Studies on thermionic ionisation detection in comprehensive two‐dimensional gas chromatography

Theory and Practice of UHPLC and UHPLC–MS

Linear retention indices in gas chromatographic analysis: a review

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