Vacuum-Assisted MonoTrapTM Extraction for Volatile Organic Compounds (VOCs) Profiling from Hot Mix Asphalt

MonoTrapTM was introduced in 2009 as a novel miniaturized configuration for sorptive sampling. The method for the characterization of volatile organic compound (VOC) emission profiles from hot mix asphalt (HMA) consisted of a two-step procedure: the analytes, initially adsorbed into the coating in n...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2024-10, Vol.29 (20), p.4943
Main Authors: Dugheri, Stefano, Cappelli, Giovanni, Fanfani, Niccolò, Squillaci, Donato, Rapi, Ilaria, Venturini, Lorenzo, Vita, Chiara, Gori, Riccardo, Sirini, Piero, Cipriano, Domenico, Sajewicz, Mieczyslaw, Mucci, Nicola
Format: Article
Language:English
Subjects:
Automation
Carbon
Design of experiments
Environmental protection
gas chromatography-mass spectrometry
hot mix asphalt
monolithic material sorptive extraction
odor emission
Odors
under vacuum extraction
VOCs
Volatile organic compounds
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Summary:MonoTrapTM was introduced in 2009 as a novel miniaturized configuration for sorptive sampling. The method for the characterization of volatile organic compound (VOC) emission profiles from hot mix asphalt (HMA) consisted of a two-step procedure: the analytes, initially adsorbed into the coating in no vacuum- or vacuum-assistance mode, were then analyzed following an automated thermal desorption (TD) step. We took advantage of the theoretical formulation to reach some conclusions on the relationship between the physical characteristics of the monolithic material and uptake rates. A total of 35 odor-active volatile compounds, determined by gas chromatography-mass spectrometry/olfactometry analysis, contributed as key odor compounds for HMA, consisting mainly of aldehydes, alcohols, and ketones. Chemometric analysis revealed that MonoTrapTM RGC18-TD was the better coating in terms of peak area and equilibrium time. A comparison of performance showed that Vac/no-Vac ratios increased, about an order of magnitude, as the boiling point of target analytes increased. The innovative hybrid adsorbent of silica and graphite carbon monolith technology, having a large surface area bonded with octadecylsilane, showed effective adsorption capability, especially to polar compounds.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules29204943