A Laboratory Evaluation of Sorbent Tubes for use with a Thermal Desorption Gas Chromatography-Mass Selective Detection Technique

Bishop, Richard W.; Valis, Robert J.

doi:10.1093/chromsci/28.11.589

Cited by 30 publications

(3 citation statements)

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“…The adsorbent tubes allow the trapping of most gases and vapors. Their use has been widely studied since the 1990s [46][47][48][49] , with higher attention on VOCs and their impact on health and the environment. Numerous reference documents describe sampling and analytical conditions for VOC characterization in stationary sources [50] or working areas [51] using sorbent tubes.…”

Section: Samplingmentioning

confidence: 99%

Boosting VOCs elimination by coupling different techniques

Khawaja¹,

Veerapandian²,

Bitar³

et al. 2022

Chem Synth

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Volatile Organic Compounds (VOCs) are known to be hazardous and harmful to human health and the environment. In mixtures or during repeated exposures, significant toxicity of these compounds in trace amounts has been revealed. In vitro air-liquid interface approaches underlined the interest in evaluating the impact of repeated VOC exposure and the importance of carrying out a toxicological validation of the techniques in addition to the standard chemical analyses. The difficulties in sampling and measuring VOCs in stationary source emissions are due to both the complexity of the mixture present and the wide range of concentrations. The coupling of VOC treatment techniques results in efficient systems with lower operating energy consumption. Three main couplings are outlined in this review, highlighting their advantages and relevance. First, adsorption-catalysis coupling is particularly valuable by using adsorption and catalytic oxidation regeneration initiated, for example, by selective dielectric heating. Then, several key aspects of the plasma catalysis process, such as the choice of catalysts suitable for the non-thermal plasma (NTP) environment, the simultaneous removal of different VOCs, and the in situ regeneration of the catalyst by NTP exposure, are discussed. The adsorption-photocatalysis coupling technology is also one of the effective and promising methods for VOC removal. The VOC molecules strongly adsorbed on the surface of the photocatalyst can be directly oxidized by the photogenerated hole on the photocatalyst (e.g., TiO2).

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Section: Samplingmentioning

confidence: 99%

Boosting VOCs elimination by coupling different techniques

Khawaja¹,

Veerapandian²,

Bitar³

et al. 2022

Chem Synth

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“…2) Desorción térmica: Este procedimiento está siendo cada vez más utilizado en los últimos años (Burger, 1986) (Selke, 1987 (Raghavan, 1989) (Bishop. 1990) (Dubrova.…”

Section: Espacio De Cabeza Dinámicounclassified

Técnicas de aislamiento y concentración de volátiles de aceites vegetales

Morales¹,

Aparicio²,

Gutiérrez³

1992

Grasas y Aceites

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RESUMEN Técnicas de aislamiento y concentración de volátiles de aceites vegetalesUno de los métodos de evaluación del flavor de los alimentos consiste en la determinación de sus componentes volátiles. La primera etapa necesaria para realizar este tipo de análisis es el aislamiento y concentración de los mismos. Se ha realizado una revisión bibliográfica sobre las diferentes técnicas utilizadas para este fin en diferentes alimentos y especialmente en aceites vegetales. Los métodos utilizados son muy diversos, se ofrece una explicación de cada uno de ellos considerando las diferentes variantes existentes. Asimismo se detallan las aplicaciones realizadas en aceites vegetales durante los últimos años. PALABRAS-CLAVE: Aceite vegetal -Componentes volátiles (aislamiento) -Componentes volátiles (concentración) -Información (artículo). SUIVIMARY Techniques for the isolation and concentration of vegetable oils volátilesOne of the methods for food flavor evaluation is the analysis of volatile components. First step in this kind of analysis Is the isolation and concentration of volátiles. A review is carried out about different techniques applied in foods and especially in vegetable oils. Very different methods have been used, an explication of each one with its different cases are presented. Likewise the applications carried out in vegetable oils during last years are discussed.

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“…Carbograph 4 is an interesting adsorbent: it is a graphitized carbon black, and it has a surface area doubled with respect to Carbopack B or Carbotrap, widely employed in gas-liquid-solid chromatography and in preconcentration of gaseous and liquid samples [see for example [1][2][3][4][5][6][7]. Therefore, it can have useful applications when the most volatile compounds have to be analyzed.…”

Section: Introductionmentioning

confidence: 99%

Discussion of thermodynamic data obtained by adsorption gas chromatography of hydrocarbons on carbograph 4

Mastrogiacomo

Pierini

2001

Chromatographia

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A new graphitized carbon black, Carbograph 4, with a specific surface area of 240 m 2 g-] was studied in terms of enthalpy, entropy and free energy of adsorption, determined by gas chromatographic method on a series of alkanes (C2-C6) and on benzene. The changes in the isosteric heat and entropy of adsorption when a non-polar stationary phase (squalane) was added to the adsorbent were also investigated. The data obtained are discussed and compared to those present in the literature for other graphitized carbon blacks. Some examples of separations obtained with Carbograph 4 are reported.

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A Laboratory Evaluation of Sorbent Tubes for use with a Thermal Desorption Gas Chromatography-Mass Selective Detection Technique

Cited by 30 publications

References 0 publications

Boosting VOCs elimination by coupling different techniques

Boosting VOCs elimination by coupling different techniques

Técnicas de aislamiento y concentración de volátiles de aceites vegetales

Discussion of thermodynamic data obtained by adsorption gas chromatography of hydrocarbons on carbograph 4

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