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COMPARATIVE OF THE ADSORPTION PERFORMANCE OF A MULTI-SORBENT BED (CARBOTRAP, CARBOPACK X, CARBOXEN 569) AND A TENAX TA ADSORBENT TUBE FOR THE ANALYSIS.

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Presentation on theme: "COMPARATIVE OF THE ADSORPTION PERFORMANCE OF A MULTI-SORBENT BED (CARBOTRAP, CARBOPACK X, CARBOXEN 569) AND A TENAX TA ADSORBENT TUBE FOR THE ANALYSIS."— Presentation transcript:

1 COMPARATIVE OF THE ADSORPTION PERFORMANCE OF A MULTI-SORBENT BED (CARBOTRAP, CARBOPACK X, CARBOXEN 569) AND A TENAX TA ADSORBENT TUBE FOR THE ANALYSIS OF VOCs E.Gallego 1, F. X. Roca 1, F. Perales 1, X. Guardino 2 and M. G. Rosell 2 1 Laboratori del Centre de Medi Ambient. Universitat Politècnica de Catalunya (LCMA-UPC). Avda. Diagonal, 647. E Barcelona 2 Centro Nacional de Condiciones de Trabajo. INSHT. Dulcet E Barcelona. INTRODUCTION Ambient air is a very complex mixture of compounds, and has a very variable composition and concentration of pollutants. Hence, a good choice of sorbent or a good combination of different sorbents may allow the determination of a wide range of target compounds in air samples (Ribes et al., 2007; Barro et al., 2009), as well as achieve high breakthrough volumes (Demeestere et al. 2007). The selective characteristics of the sorbent chosen would determine the removing of the target compounds from the air matrix (Dąbrowski, 2001). On the other hand, a choice of a proper sorbent for the range of the studied target compounds would eliminate problems derived from breakthrough values (Dewulf and Van Langenhove, 1999). The capacity of a sorbent to retain specific compounds is usually evaluated by measuring the breakthrough volume of a concrete compound on the sorbent (Baya & Siskos 1996). To maximize sampling efficiency, the maximum volume of air that can be sampled without loss of adsorbent must be known (Harper 1993, Dettmer & Engewald 2003). Tenax TA has been determined to be a not suitable adsorbent for very volatile organic compounds (VVOCs, 0


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