. Author manuscript; available in PMC: 2021 Feb 15.

Published in final edited form as: Atmos Environ (1994). 2020 Feb 15;223:10.1016/j.atmosenv.2019.117227. doi: 10.1016/j.atmosenv.2019.117227

Table 2:

Mass fractions of class-specific SOA tracers generated in laboratory chamber oxidation experiments as a function of SOA and SOC with propagated analytical uncertainties. DHOPA is a tracer of SOA from monoaromatic VOCs, phthalic acid from diaromatic VOCs, and methyl-nitrocatechols from cresols. Measurement uncertainties for individual species are given in Table S1.

SOA Tracer	Precursor	Oxidant	f_SOA (uncertainty)	f_SOC (uncertainty)
DHOPA
	Benzene	NO_x	0.00013 (0.00002)	0.00029 (0.00004)
	Toluene	NO_x	0.0032 (0.0004)	0.0070 (0.0008)
	o-Xylene	NO_x	0.0024 (0.0003)	0.0047 (0.0006)
	m-Xylene	NOx	0.0036 (0.0004)	0.0064 (0.0008)
	p-Xylene	NO_x	0.0039 (0.0005)	0.0072 (0.0009)
	Ethylbenzene	NO_x	0.00015 (0.00002)	0.00031 (0.00004)
	1,2,4-Trimethylbenzene	NO_x	0.0022 (0.0003)	0.0035 (0.0004)
	1,3,5-Trimethylbenzene	NOx	0.00035 (0.00004)	0.00052 (0.00006)
	Benzene	H₂O₂	0.00013 (0.00002)	0.00042 (0.00005)
	Toluene	H₂O₂	0.0068 (0.0008)	0.015 (0.002)
Phthalic acid
	Naphthalene	NOx	0.024 (0.002)	0.046 (0.005)
	1-Methylnaphthalene	NOx	0.0075 (0.0008)	0.013 (0.001)
	Naphthalene	H₂O₂	0.055 (0.005)	0.108 (0.011)
	1-Methylnaphthalene	H₂O₂	0.0068 (0.0007)	0.0141 (0.0014)
Methyl-nitrocatechols¹
	o-Cresol	NOx	0.041 (0.010)	0.073 (0.072)
	m-Cresol	NOx	0.279 (0.069)	0.494 (0.122)
	p-Cresol	NOx	0.057 (0.010)	0.111 (0.020)

¹⁾

The sum of 4-methyl-5-nitrocatechol and 3-methyl-6-nitrocatechol