Table 1 Performance tests of the Tree DEMON for BVOC emission studies

BVOC sampler unit repeatability and reproducibility

Sampling of Δ²-carene enriched air direct at chamber inlet

48 (4 sampler strings, 4 ports, three repetitions)

Sample rate 150 ml_n min⁻¹, Sample duration: 10 min, Standard gas addition: 50 ml_n min⁻¹ of Δ²-carene

Chamber flow rate: 5 l_n min⁻¹ (~0.22 nmol mol⁻¹ Δ²-carene mixing ratio in the inlet air)

Chamber wall effects

Sampling Δ²-carene enriched air direct at chamber inlet and outlet simultaneously at 2 chambers

20 (2 chambers with each 2 sampler strings at inlet and outlet, 5 measurements)

See above

Residence time of compounds

Sampling system air after 1 h stop of Δ²-carene enrichment

12 (2 chambers with each 2 sampler strings at inlet and outlet, 3 measurements)

See above