Finding F-1239

“Assuming the entire increase in formaldehyde concentration on Day 2 (1.2 ppbv, 1.5 μg m−3, over the time frame of ozone injection) is due to ozonolysis, the production rate for formaldehyde is 27 μg h−1.”

Poppendieck et al. Jingle bells, what are those smells? Indoor VOC emissions from a live Christmas tree (2024). Indoor environments. Page 9. CKB 6007

Structure

Factor: Formaldehyde (CH₂O)
Method: Emission test chamber method
Setting: test chamber, US
Study design: chamber study at the National Institute of Standards and Technology: a freshly cut Douglas fir stood for seventeen days in an environmentally controlled chamber and the volatile organic compounds it emitted were measured continuously with a proton transfer reaction mass spectrometer, with ozone injected on several of the days to observe the indoor chemistry it starts (class 4)
Effect: emission-rate 27
Caveat: a rate the study calculates on the assumption that the whole formaldehyde increase comes from ozonolysis, and formaldehyde in the ventilation air was not measured

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.