Emission rates of volatile organic compounds from paper
Résumé
Emissions of VOCs from model papers aged in closed tubes for various periods of time were quantified using an emission cell (FLEC) placed directly on the paper surface. This sampling technique is entirely non-invasive for the artefact. At the outlet of the cell, the VOCs were accumulated during
24 h on two types of sorbent packings, 2,4-dinitrophenylhydrazine (DNPH) derivatised silica and Tenax TA. Carbonyl compounds collected on DNPH/silica cartridges were analysed by liquid chromatography and UV detection (LC/UV). The other VOCs, collected on Tenax TA tubes, were thermally desorbed and injected in a gas chromatograph with dual detection by flame ionisation and mass spectrometry (TD-GC/FID/MS). Numerous VOCs produced during the degradation of the paper could be identified and quantified. For the first time, their mean emission rates were determined. The most abundant compounds, acetaldehyde, acetic acid, vanillin, furfural and other heterocyclic compounds, showed a production that increased
with paper ageing time.
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