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The most important features of Tenax and Carbotrap, solid sorbents used widely for sampling organic pollutants in air, have been tested under the conditions requested for surveys in indoor spaces and for determinations of VOC emitted from indoor sources by chamber experiments. The performances of samplers, tested with 10 nonpolar and polar (mostly lipophilic) hydrocarbons, present as vapours in 0.5 to 2.0 litre air samples, include: (a) accuracy and reproducibility of the measured concentration; (b) background or blank of samplers; (c) stability upon storage (at ambient and below ambient temperatures) of clean samplers and of samplers loaded with VOC; (d) performance stability after several sampling desorption cycles. The results fulfil the requirements for both adsorbents, though each presents different drawbacks. In particular, Tenax samplers show a blank (90 percentile) of 16 ng of benzene and 5 ng of toluene, Carbotrap samplers roughly twice as much. The samplers may be stored for one month either before or after use and may withstand many cycles without discernible deterioration.

Additional information

Authors: DE BORTOLI M ET AL., JRC Ispra (IT)
Bibliographic Reference: Article: Indoor Air, Vol. 2 (1992) pp. 216-224
Record Number: 199310374 / Last updated on: 1994-11-29
Original language: en
Available languages: en
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