Determination of solute diffusion coefficients in cross-linked stationary phases for fused-silica columns

Cramers, C.A.M.G.; Tilburg, C.E. van; Schutjes, C.P.M.; Rijks, J.A.; Rutten, G.A.F.M.; Nijs, Ruben

doi:10.1016/s0021-9673(01)93603-9

Cited by 18 publications

(11 citation statements)

References 6 publications

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“…The values for the diffusion coefficients in the stationary phase were obtained by curve fitting of experimental plate height data to the Golay-Giddings equation. Experimental values for the diffusion coefficients of n-alkanes in OV-1 and CP-Sil5 have been measured by Cramers et al [26]. Extrapolation to 175 "C of their Ds values for n-undecane at 75, 100, and 125 "C, measured on a 3 14 pm id.…”

Section: Resultsmentioning

confidence: 99%

Capillary GC on 50 micrometer I.D. Columns coated with thick films. Theory and selected practical results

Steenackers

Sandra

1995

J. High Resol. Chromatogr.

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Section: Resultsmentioning

confidence: 99%

Capillary GC on 50 micrometer I.D. Columns coated with thick films. Theory and selected practical results

Steenackers

Sandra

1995

J. High Resol. Chromatogr.

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“…A decrease in column internal diameter reduces resistance to mass transfer in the gaseous phase and, thus, column band broadening (as can be derived from the classical Golay-Giddings equation [20][21][22][23]), leading to an increase in resolving power. The use of narrow-bore columns is not new, as at the beginning of the 1960s, Desty et al [24] demonstrated the potential of reduced-diameter short columns: the separation of 15 compounds was achieved in about 2 s. Due to the lack of automated injection systems, a narrow sample band was injected very effectively onto the capillary, by means of a hammer.…”

Section: Theory and Instrumental Requirementsmentioning

confidence: 99%

“…In the case of nonexcessively fast GC applications, less expensive scanning systems (i. e. quadrupole) may be used even for quantitative purposes [17]. In fact, ultimate generation quadrupole mass spectrometers (qMSs), operated in the full scan mode (the mass range window may be reduced, but spectral information could be lost), may generate up to [20][21][22][23][24][25] patibilities. The effectiveness of a rapid scanning quadrupole MS in a narrow-bore column fast GC analysis on menhaden oil FAMEs was shown by Mondello et al [44].…”

Section: Narrow-bore Columnsmentioning

confidence: 99%

Rapid analysis of food products by means of high speed gas chromatography

Donato

Tranchida

Dugo

et al. 2007

J of Separation Science

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ReviewRapid analysis of food products by means of high speed gas chromatographySince the invention of GC, there has been an ever increasing interest within the chromatographic community for faster GC methods. This is obviously related to the fact that the number of samples subjected to GC analysis has risen greatly. Nowadays, in routine analytical applications, sample throughput is often the most important aspect considered when choosing an analytical method. Gas chromatographic instrumentation, especially in the last decade, has been subjected to continuous and considerable improvement. High-speed injection systems, electronic gas pressure control, rapid oven heating/cooling and fast detection are currently available in a variety of commercial gas chromatographs. The main consequence of this favourable aspect is that high-speed GC is being increasingly employed for routine analysis in different fields. Furthermore, the employment of dedicated software makes the passage from a conventional to a fast GC method a rather simple step. The present review provides an overview of the employment of fast GC techniques for the analysis of food constituents and contaminants. A brief historical and theoretical background is also provided for the approaches described.

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“…For a theoretical description of the column efficiency, stationary phase diffusivities are needed in addition to the solute diffusion coefficients in the mobile phase. In gas chromatography (GC), solute diffusion coefficients in the stationary phase were obtained [66][67][68] by using the van Deemter or Golay equations. Similar studies in SFC are complicated by a significant uncertainty in the stationary phase film thickness; the uncertainty results from the uptake of the mobile phase fluid by the stationary phase (see below).…”

Section: In the Taylor Dispersion Measurements In Sfmentioning

confidence: 99%

Diffusion and thermodynamic measurements by supercritical fluid chromatography

Roth

1991

J Microcolumn Separations

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Abstract. Applications of supercritical fluid chromatography (SFC) to physicochemical measurements are reviewed. Emphasis is laid on the determination of binary diffusion coefficients at infmite dilution of solutes in supercritical solvents, and on actual or potential applications of SFC to the measurements of thermodynamic quantities in dilute, binary, supercritical mixtures. Physicochemical measurements emerge as a specific application field of SFC with many links to transport phenomena and to molecular thermodynamics of fluid-phase equilibria. Key words: supercritical fluid chromatography, d i p i v i t y measurements, diDsioncoescients, thermodynamic measurements, dilute supercritical mixtures

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Determination of solute diffusion coefficients in cross-linked stationary phases for fused-silica columns

Cited by 18 publications

References 6 publications

Capillary GC on 50 micrometer I.D. Columns coated with thick films. Theory and selected practical results

Capillary GC on 50 micrometer I.D. Columns coated with thick films. Theory and selected practical results

Rapid analysis of food products by means of high speed gas chromatography

Diffusion and thermodynamic measurements by supercritical fluid chromatography

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