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Breakthrough volume of monoterpenes on Tenax TA: influence of temperature and concentration for α-pinene

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Abstract

The breakthrough volumes (BTV) of several monoterpenes (α- and ß-pinene, myrcene, sabinene, Δ3-carene and limonene) on Tenax TA were determined at very low mixing ratios (0.2–30 ppb, v/v). α-Pinene, which exhibits the lowest BTV of all terpenes studied (16.3 l g−1 at 34°C for a mixing ratio of 3 ppb, v/v) was taken as a standard during the atmospheric sampling. A study of the influence of temperature and mixing ratio on its BTV was carried out. The influence of temperature is shown to follow a Van't Hoff-type law of the form log (BTV)=a+b/T, whereas the influence of the concentration follows Freundlich's adsorption isotherm, expressed as log (BTV) = log a+b log C.

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