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. 2014 Sep 17;48(20):11944–11953. doi: 10.1021/es502204x

Table 2. Experimental Conditionsa.

expt # date BVOC [BVOC]I (ppb) [N2O5]I (ppb) kNO3+BVOC @298 K (cm3 molec-1 s–-1) [N2O5]i/[BVOC]i
1 9/15/11 α-pinene (seeded) 48 54 6.16 × 10–12 1.1
2 9/28/11 β-pinene “high” 41 60 2.51 × 10–12 1.5
3 10/18/11 β-pinene “low” 10 10 2.51 × 10–12 1.0
4 9/19/11 Δ-3-carene “high” 16 42 9.1 × 10–12 2.6
5 10/21/11 Δ-3-carene “low” 10 9 9.1 × 10–12 0.9
6 10/3/11 limonene “high” 40 60 1.22 × 10–11 1.5
7 10/11/11 limonene “low” 10 10 1.22 × 10–11 1.0
8 10/15/11 limonene (+ O3 + NO2) 10 [O3]i = 12 ppb; [NO2]i= 6.3 ppb 1.22 × 10–11 1.2
9 9/22/11 β-caryophyllene “high” 109 40 1.9 × 10–11 0.4
10 10/26/11 β-caryophyllene “low” 3 10 1.9 × 10–11 3.0
11 11/11/11 sabinene 9 10 1 × 10–11 1.1
a

Except α-pinene, all experiments were conducted without seed aerosol. Rate constants at 298 K are taken from Calvert et al. (2000).21 For the “low” experiments, the ratio of N2O5 to BVOC in the inlet line was approximately 1:1; for the “high” experiments, the oxidant was generally in slight excess (with the exception of Expt # 9). The highest purity sabinene source available was 80%, and contained 20% β-pinene. No correction was applied for this, so sabinene SOA reflects this mixture.