Finding F-1072

“Notably, 30 min after KF94 masks were removed from their packaging, TVOC concentrations decreased by about 80% from their initial levels to 724 ± 5.86 μg m–3; furthermore, 6 h after removal, TVOC concentrations were found to be less than 200 μg m–3.”

Ryu Measuring the quantity of harmful volatile organic compounds inhaled through masks… (2023). Ecotoxicology and environmental safety. Page 2. CKB 5530

Structure

Factor: Total volatile organic compounds (TVOC)
Setting: test chamber, KR (30 minutes after the packaging was opened)
Study design: chamber study of the volatile organic compounds released by face masks in Korea: total and individual compounds measured immediately after the packaging was opened, after 30 minutes, after 6 hours and at a raised temperature, for disposable and multi-use masks, with the inhaled mass estimated from the mass flow rate (class 4)
Effect: mean 724
Caveat: a chamber measurement of the product; airing the mask before wearing it is what the authors draw from this

A Finding records what one published document states, verbatim and with its page. It is not a conclusion of Coridum; see the Claims that build on it.