Table 4. Observed Organic Nitrate Yields and Gas/Aerosol Partitioning, and Nitrogen Balance^a.

BVOC	molar organic nitrate yield (Δ[ANs + PNs]/ Δ[VOC])	fraction of organonitrates in aerosol phase (Δ[ANs + PNs]aero/Δ[ANs + PNs]	organonitrate fraction of total aerosol mass (MANsaero/Mo)	N-balance: NO2 release (Δ[NO2]/ −Δ[N2O5])	N-balance: organonitrate formation (Δ[ANs + PNs]/–Δ[N2O5])
β-pinene	0.22	0.76	0.56	1.04 1.15	0.08 0.23
Δ-3-carene	0.77	0.50	0.56	1.14	0.22
limonene	0.54	0.83	0.82	0.76 0.96	0.31 0.41
β-caryophyllene	n/a	1	0.80	n/ab	n/ab
α-pinene	0.10	0	0	1.54 1.75	0.03 0.10

^aBVOC-based molar organic nitrate yield, aerosol fraction of organonitrates, and organonitrate fraction of total aerosol mass are all evaluated at 2 h after chamber experiment initiation (data are all from the high-concentration experiments, when the TD-LIF instrument was available); N₂O₅-based NO₂ and ANs + PNs production are evaluated at 30 min after chamber experiment initiation. For β-pinene, limonene, and α-pinene, NO₃ decays slowly enough that this N balance analysis can be reliably repeated at 2 h. These are the numbers reported in italics.

^bSeveral parameters are not available for β-caryophyllene, because the N₂O₅ decay was very rapid and not well-characterized.