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ACS Sens

Title:		Preserve Your Books through the Smell
Author(s):		Verissimo MIS; Oliveira J; Evtuguin DV; Gomes M;
Address:
Journal Title:		ACS Sens
Year:		2019
Volume:		20191024
Issue:		11
Page Number:		2915 - 2921
DOI:		10.1021/acssensors.9b01279
ISSN/ISBN:		2379-3694 (Electronic) 2379-3694 (Linking)
Abstract:		"The identification of paper composition, pH, early signs of paper degradation, and emitting volatile organic compounds (VOCs) are mandatory for effective preventive conservation of paper/books. Sampling restrictions in the analysis of cultural heritage materials limit the choice of appropriate analytical methods. Solvent-free analytical techniques with nondestructive sampling are needed. Addressing this challenge, an electronic nose based on six-coated piezoelectric quartz crystals was assembled and used to analyze VOCs emitted from books. Careful selection of sensor coatings and cluster analysis allowed us to achieve a clear distinction between cotton/linen rag and wood pulp paper, and among the letter group, the discrimination between papers manufactured from alkaline and acidic stocks. This six-element sensor array was therefore able to replace destructive tests as the ones ordinarily used for paper pH measurements. The same electronic nose was able to separate aged pale-yellow paper, a visible initial sign of paper degradation, from well-preserved still white papers, even when made from the same raw material. One of the used sensors detected furfural, often seen as a marker of cellulose degradation, at lower levels than the detection limit found in the literature with gas chromatography-mass spectrometry, a much more complex bulky and expensive instrument"
Keywords:		Books Electrochemical Techniques Electronic Nose Gas Chromatography-Mass Spectrometry Hydrogen-Ion Concentration Molecular Structure Paper Quartz *Smell Volatile Organic Compounds/*analysis acoustic wave sensor array cultural heritage non-destructive anal;
Notes:		"MedlineVerissimo, Marta I S Oliveira, Joao A B P Evtuguin, Dmitry V Gomes, M Teresa S R eng Research Support, Non-U.S. Gov't 2019/10/28 ACS Sens. 2019 Nov 22; 4(11):2915-2921. doi: 10.1021/acssensors.9b01279. Epub 2019 Oct 24"