From: Quantification of formic acid and acetic acid emissions from heritage collections under indoor room conditions. Part I: laboratory and field measurements
Concentration (µg m−3)
Season
Storage I
Storage II –archival collections
Storage II –mixed materials
Outdoor
Winter
7 (6 °C)
3 (9 °C)
28 (9 °C)
< LOQ
Summer
15 (14 °C)
9 (17 °C)
97 (15 °C)