Gas Chromatography

Eiceman, Gary A.; Hill, Herbert H.; Davani, B.; Gardea-Torresday, Jorge

doi:10.1021/a1960013d

Cited by 26 publications

(11 citation statements)

References 320 publications

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“…In combination with isotopic labeling of metabolite, the GC-MS is used for determining metabolic activity. Most applications are based on the use of 13 C labeling and the measurement of 13 C- 12 C ratios with an isotope ratio mass spectrometer (IRMS); an MS with a detector designed to measure a few select ions and return values as ratios. It is useful to detect oils in creams, ointments, lotion etc.…”

Section: Medicine and Pharmaceutical Applicationsmentioning

confidence: 99%

GC-MS Technique and its Analytical Applications in Science and Technology

Chauhan¹

2014

J Anal Bioanal Tech

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Section: Medicine and Pharmaceutical Applicationsmentioning

confidence: 99%

GC-MS Technique and its Analytical Applications in Science and Technology

Chauhan¹

2014

J Anal Bioanal Tech

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“…1,2 Various deactivation and polymer-coating processes have been also proposed for the preparation of GC columns with good separation performance and stability. [3][4][5][6] In contrast to the successful applications and subsequent commercialization of these polymer-coated columns, such as wall-coated, support-coated and pellicular-coated, the reports for the fibrous polymer-packed stationary phases, however, have been limited, except for characterizing the surface of the fibers in inverse GC (IGC).…”

Section: Introductionmentioning

confidence: 99%

Polymer-Coated Fibrous Stationary Phases in Packed-Capillary Gas Chromatography

et al. 2004

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Gas chromatography (GC) is regarded as an essential separation method for the analysis of volatile compounds, and a wide variety of polymeric liquid-phases have been developed as the stationary phase. 1,2 Various deactivation and polymer-coating processes have been also proposed for the preparation of GC columns with good separation performance and stability. [3][4][5][6] In contrast to the successful applications and subsequent commercialization of these polymer-coated columns, such as wall-coated, support-coated and pellicular-coated, the reports for the fibrous polymer-packed stationary phases, however, have been limited, except for characterizing the surface of the fibers in inverse GC (IGC). 7,8 In general, the surface characteristics of the fiber have been analyzed with IGC technique by injecting the standard samples into a fiber-packed column and measuring the elution behavior. This characterization method is based on the observation of the specific interactions between the surface of the fibers and the standard solutes injected as the probes. Consequently, it is quite natural that a synthetic fiber can be employed as a separation medium in GC, if the fiber possesses both the thermal stability for the operation at an elevated temperature and the resistance to the gaseous chemical species through the column during the separation.In terms of the use of fibrous stationary phase in liquid phase separation methods, several applications have been reported. Kiso et al. introduced fibrous cellulose acetate (CA) stationary phase for the separation of alcohols 9 and polycyclic aromatic hydrocarbons (PAHs) 10 in microcolumn LC, and Jinno et al.reported the application of CA phase in capillary electrochromatography (CEC). 11,12 Recently, the possibility of the several synthetic fibers as the stationary phase in CEC 13 was also demonstrated. Although the separation efficiency of those columns was still not comparable with those of conventional particle-packed columns such as octadecylsilica (ODS) phase, and moreover, there were several limitations on the mobile phase composition and the packing density, still it has been clearly shown that the packed filaments could play the role as a stationary phase. Saito et al. have also reported the successful applications of fibrous polymeric material as an extraction medium for novel miniaturized sample preparations specially designed for the on-line coupling to microcolumn liquid phase separation methods. 14-22 On the basis of the above successful applications of fibrous materials as the stationary phase and the extraction medium, fiber-packed fused-silica capillaries have been introduced in our previous study for the separation of volatile compounds in GC. 23In this work, polymer coating onto the packed-filaments in a capillary was investigated using several conventional polymeric materials as the liquid-phase for capillary GC columns. As the fibrous material, Zylon ® [poly(p-phenylene-2,6-benzobisoxazole)] fiber ( Fig. 1) was employed, taking into account the heat resistance...

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“…Currently gas chromatographs (GCs) are widely employed, as they offer the ability to decompose the process stream while measuring the concentration of each constituent. However, GCs require sophisticated and cost-intensive measurement and calibration systems, with a delayed response [1]. The latter stems mainly from sample lines and thus inhibits real-time operations and feedback-loops.…”

Section: Introductionmentioning

confidence: 99%