Investigation of ATR-FTIR spectroscopy as an alternative to the Water Leach Free Acidity test for cellulose acetate-based film

Karin Bonde Johansen, Yvonne Shashoua

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Cellulose acetate film loses acetate groups on ageing which results in the formation of damaging acetic acid. Water-Leach Free Acidity Test (WLFAT) is the definitive technique to quantify acidity, but requires 1g film and 26 hours. ATR-FTIR spectroscopy is a non-destructive, rapid technique which was used to relate the concentration of C=O groups lost during deacetylation to the concentration of reference C-H groups. Comparison of WLFAT and ATR-FTIR showed similar trends in deterioration rate of new, slightly- and highly degraded films. Both techniques were equally effective at quantifying the degradation of film, though ATR-FTIR could not quantify onset of autocatalysis.
TitelInternational Council of Museums-Conservation Committee 14th Triennial Meeting 2005 The Hague
ForlagJames & James
Publikationsdato4 sep. 2005
ISBN (Trykt)1-84407-253-3
StatusUdgivet - 4 sep. 2005