A comparison of the critical parameters of some adsorbents employed in trapping and thermal desorption of organic pollutants

Sampling and analysis of volatile organic compounds in air using a dualsorbent trap

“…This is a problem for example with Tenax. Therefore, they can be re-utilized indefinitely [7,10,15]. Of course, other compounds could interfere because of the high adsorbance capacity of graphitized carbons as they could be coadsorbed with the target analytes.…”

Evaluation of a new dualsorbent trap for organic pollutants of different volatility

“…However, the experimental conditions are very different from real sampling conditions [ 11 ]. Concerning trapping efficiency, the trap is not suitable for monitoring methanol when the sampled amount exceeds 200 ng at 20 ~ Even when lower amounts are to be determined, the sampling volume not should exceed 200 mL.…”

“…However, the solvent peak may disturb the chromatographic analysis of the lighter compounds or, in the case of atmospheric pollutants, may cause excessive sample dilution [3,4]. Many solid sorbing materials have been evaluated in the literature for the collection and thermal desorption analysis of VOCs [5][6][7][8][9][10][11]. Tenax, for example, is inert and has low affinity for water vapor, but partially decomposes at high temperatures, releasing artifacts such as benzaldehyde, acetophenone, phenol and benzonitrile [12][13][14][15].…”

Comparison of chemical and physical properties of carbon blacks for sampling and analysis of environmental pollutants

“…Pore size is important in trapping small analytes and differences in pore size distribution contribute to explaining the varied retention of molecules by graphitized carbon blacks with the same specific surface. Furthermore, polar molecules interact with metal atoms or polar functional groups present on the carbon surface, leading to different breakthrough volumes on graphitized carbons with the same specific surface [22]. The present paper deals with pore size and distribution, as well as specific surface before and after thermal treatment, of some of the main carbon blacks in the market.…”