Quantification of formic acid and acetic acid emissions from heritage collections under indoor room conditions. Part I: laboratory and field measurements

Signe Hjerrild Smedemark · Morten Ryhl-Svendsen · Alexandra Schieweck

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Conservation Techniques and Studies Cultural Heritage Materials Analysis Indoor Air Quality and Microbial Exposure

Abstract

Abstract The area-specific emission rates of formic acid and acetic acid from heritage objects made of wood and paper were quantified for normal indoor room conditions (23 °C, 50% RH) as well as for cooler (10 °C) and drier (20% RH) conditions. At normal indoor conditions, the emission rate of formic acid and acetic acid together were in the range of 10 to 300 µg m−2 h−1. The emission rate decreased by a factor of 2–4 from wood and paper when lowering the temperature from 23 to 10 °C. The emission rate decreased by more than a factor of 2 when reducing the relative humidity (RH) from 50% to 20%. This corresponds well with field measurements in real storage rooms containing heritage collections. In addition, 36 volatile organic compounds (VOCs) were identified to be released by four paper samples. All the VOCs detected can in general originate from several sources. Therefore, these substances cannot be used as unique degradation markers for paper but rather as an indication of emission sources present in the indoor environment.

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References

2009Acetic and formic acids emitted from wood samples and their effect on selected materials in museum environments 2002Airborne pollutants in museums, galleries and archives : risk assessment, control strategies, and preservation management 2006The use of Raman spectrometry to predict the stability of historic glasses 2017Smell of heritage: a framework for the identification, analysis and archival of historic odours 2013Air quality monitoring in a museum for preventive conservation: Results of a three-year study in the Plantin-Moretus Museum in Antwerp, Belgium 2010Indoor air quality in passive-type museum showcases 2011The effect of volatile organic compounds and hypoxia on paper degradation 2012Measurement of volatile organic compounds emitted in libraries and archives: an inferential indicator of paper decay?

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2020Distribution of temperature, moisture and organic acids in storage facilities with heritage collections 2021Validation of passive samplers for monitoring of acetic and formic acid in museum environments 2020Removal of Organic Acids from Indoor Air in Museum Storage Rooms by Active and Passive Sorption Techniques 2021Spanish Royal glasses with crizzling in historical buildings. The importance of environmental monitoring for their conservation

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