Exploring thermal isomerisation in gas chromatography analyses using natural pyrethrins: Comparison of comprehensive two-dimensional and one-dimensional gas chromatography

Byrnes, Neil Andrew; Wu, Yuesong; Nolvachai, Yada; Marriott, Philip J.

doi:10.1016/j.chroma.2023.464369

Journal of Chromatography A

2023

DOI: 10.1016/j.chroma.2023.464369

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Exploring thermal isomerisation in gas chromatography analyses using natural pyrethrins: Comparison of comprehensive two-dimensional and one-dimensional gas chromatography

Neil Andrew Byrnes,

Yuesong Wu,

Yada Nolvachai

et al.

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2024

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Cited by 4 publications

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Generalized flow calculation of the gas flow in a network of capillaries used in gas chromatography

Leppert,

Brehmer,

Boeker

et al. 2024

J of Separation Science

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A general method for the calculation of the flow and pressure of a gas in a network of cylindrical capillaries is presented. This method is used specifically for gas chromatographic systems in this work. With this approach, it is possible to easily calculate flow and pressures in complex gas chromatographic systems, like flow‐modulated or thermal‐modulated multidimensional gas chromatographic systems, or systems with multiple outlets at different pressures. A mathematic abstraction using graph theory is used to represent the system of capillaries. With this graph, the flow balance equations at the connections of the capillaries can easily be set up. Using a computer algebra system, the system of flow balance equations can be solved for the pressures at the connection points. For simple systems, this approach is presented, and calculated flows, pressures, and hold‐up times are compared with measured values. In addition, two complex systems (4‐Way‐Splitter, Deans Switch system) of capillaries are presented with calculations only. For these systems, certain conditions were formulated, that is, a certain difference in hold‐up times and a defined split ratio between different paths of these systems. Using a numeric non‐linear solver, configurations of these systems were found, that fulfill these conditions.

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Generalized flow calculation of the gas flow in a network of capillaries used in gas chromatography

Leppert,

Brehmer,

Boeker

et al. 2024

J of Separation Science

View full text Add to dashboard Cite

show abstract

Gas chromatographic techniques and spectroscopic approaches for a deep characterization of Piper gaudichaudianum Kunth essential oil from Brazil

Cucinotta,

Rotondo,

Coppolino

et al. 2024

Journal of Chromatography A

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Shape-shifting molecule behaviour during comprehensive two-dimensional gas chromatography analysis—A review

Marriott,

Wong,

Amaral

et al. 2024

Journal of Chromatography Open

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Exploring thermal isomerisation in gas chromatography analyses using natural pyrethrins: Comparison of comprehensive two-dimensional and one-dimensional gas chromatography

Cited by 4 publications

References 47 publications

Generalized flow calculation of the gas flow in a network of capillaries used in gas chromatography

Generalized flow calculation of the gas flow in a network of capillaries used in gas chromatography

Gas chromatographic techniques and spectroscopic approaches for a deep characterization of Piper gaudichaudianum Kunth essential oil from Brazil

Shape-shifting molecule behaviour during comprehensive two-dimensional gas chromatography analysis—A review

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