High-speed gas chromatography with direct resistively-heated column (ultra fast module-GC)-separation measure (S) and other chromatographic parameters under different analysis conditions for samples of different complexities and volatilities

Bicchi, Carlo; Brunelli, Claudio; Cordero, Chiara Emilia Irma; Rubiolo, Patrizia; Galli, Mario; Sironi, A.

doi:10.1016/j.chroma.2004.09.051

Cited by 24 publications

(6 citation statements)

References 16 publications

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“…Over the last few years, gas chromatography (GC) techniques and instrumentation able to carry out the analysis in a very short time have been spreading [5][6][7], thanks to the introduction of the electronic pressure control of the carrier gas and of the high-frequency flame ionization detectors (FID). The main instrumental parameters that influence the speed of the GC analysis are, on the one hand, the column inner diameter and length, and on the other hand, the heating and flow rates.…”

Section: Introductionmentioning

confidence: 99%

Directly resistively heated‐column gas chromatography for the evaluation of cow milk fat purity

Povolo

Pelizzola

Contarini

2008

Euro J Lipid Sci & Tech

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Cow milk fat purity is currently evaluated by triacylglycerol (TAG) analysis. The method is based on the gas chromatographic analysis of TAG according to their total number of carbon atoms, followed by the application of formulae deriving from multiple linear regressions. The original procedure was set up by using a packed column, but different successive works showed its suitability also with the adoption of more modern adjustments. Recently, the use of high-speed gas chromatography has been spreading. In this work, the suitability of the directly resistively heated-column gas chromatography [Ultrafast module (UFM)-GC] for the evaluation of milk fat purity by the Official EU method was tested. Pure milk fat, together with mixtures of milk fat containing two levels of four foreign fats (coconut fat, sunflower oil, lard and beef tallow), were analyzed by both the conventional capillary GC method and UFM-GC. Sheep, goat and buffalo milk fats were also analyzed. The reference material CRM-519 was used for calibration. Repeatability and reproducibility values were always below the limits reported in the Official method, demonstrating the suitability of UFM-GC for the evaluation of milk fat purity. The investigation on sheep, goat and buffalo milk fat confirmed that the S ranges, calculated for cow milk fat, are not applicable to the evaluation of genuineness of non-bovine milk fats.

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Section: Introductionmentioning

confidence: 99%

Directly resistively heated‐column gas chromatography for the evaluation of cow milk fat purity

Povolo

Pelizzola

Contarini

2008

Euro J Lipid Sci & Tech

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“…Several academic groups are currently pursuing the development of one or more aspects of microfabricated GC. − Field analysis applications targeted by micro-GC systems benefit from decrease in the analysis times. Analysis times in the “ultrafast” and “very fast” regime , have been reported with conventional columns, ,, the fastest ones in the sub-100-ms range. However, the fastest separations performed using microfabricated GC columns reported in the literature are in the “fast” range, and take ∼1 min .…”

mentioning

confidence: 95%

Ultrafast Gas Chromatography on Single-Wall Carbon Nanotube Stationary Phases in Microfabricated Channels

et al. 2006

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The key to rapid temperature programmed separations with gas chromatography are a fast, low-volume injection and a short microbore separation column with fast resistive heating. One of the major problems with the reduction of column dimensions for micro gas chromatography is the availability of a stationary phase that provides good separation performance. In this report, we present the first integration of single-wall carbon nanotubes (SWNTs) as a stationary phase into 100 mum x 100 mum square and 50-cm-long microfabricated channels. The small size of this column with integrated resistive heater and the robustness of the SWNT phase allow for fast temperature programming of up to 60 degrees C/s. A combination of the fast temperature programming and the narrow peak width of small-volume injections that can be obtained from a high-speed, dual-valve injection system allows for rapid separations of gas mixtures. We demonstrate highly reproducible separations of four-compound test mixtures on these columns in less than 1 s using fast temperature programming.

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“…Because of the very high efficiency of the column (about 20 000 plates per meter), 0.05 μm capillary columns with fast temperature programming allowed EO analysis in less than 90 s. High GC resolution was maintained, and quantitation of key components for quality assurance purposes is well achievable using FID as detec- tor, without a peak de-convolution as previously reported [23]. Figure 2 Ultra-fast module GC (UFM-GC) separations with analysis times lower than 1 min can also be achieved by adopting temperature programming rates up to 20 • C/s although it requires the adoption of a direct resistive heating of the capillary column and a coupling with very high frequency detection systems such as Time of Flight (ToF-MS) or FID [24][25]. This approach has been successfully adopted for the analysis of a series of EOs characterized by different complexity.…”

Section: Gc-ms [11]mentioning

confidence: 90%

Gas chromatography of essential oil: State‐of‐the‐art, recent advances, and perspectives

Cagliero

Bicchi

Marengo

et al. 2022

J of Separation Science

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This review is an overview of the recent advances of gas chromatography in essential oil analysis; in particular, it focuses on both the new stationary phases and the advanced analytical methods and instrumentations. A paragraph is dedicated to ionic liquids as gas chromatography stationary phases, showing that, thanks to their peculiar selectivity, they can offer a complementary contribution to conventional stationary phases for the analysis of complex essential oils and the separation of critical pairs of components. Strategies to speed-up the analysis time, thus answering to the ever increasing request for routine essential oils quality control, are also discussed. Last but not least, a paragraph is dedicated to recent developments in column miniaturization in particular that based on microelectromechanical-system technology in a perspective of developing micro-gas chromatographic systems to optimize the energy consumption as well as the instrumentation dimensions. A number of applications in the essential oil field is also included.

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High-speed gas chromatography with direct resistively-heated column (ultra fast module-GC)-separation measure (S) and other chromatographic parameters under different analysis conditions for samples of different complexities and volatilities

Cited by 24 publications

References 16 publications

Directly resistively heated‐column gas chromatography for the evaluation of cow milk fat purity

Directly resistively heated‐column gas chromatography for the evaluation of cow milk fat purity

Ultrafast Gas Chromatography on Single-Wall Carbon Nanotube Stationary Phases in Microfabricated Channels

Gas chromatography of essential oil: State‐of‐the‐art, recent advances, and perspectives

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