Table 2. Initial conditions of the high-NO_x experiments.

Exp. No.	Parent HC	[HC]0 (ppb)	[NO]0 (ppb)	[NO2]0 (ppb)	[NOx]0 (ppb)	RH (%)
H1	benzenea	4000	4	104	108	20.2–15.1
H2	toluenea	4000	39	398	437	15.4–12.6
H3	tolueneb	230	213	925	1138	14.1–12.2
H4	ethylbenzenea	4000	3	480	483	15.4–13.7
H5	m-xylenea	4000	28	312	340	18.7–14.0
H6	m-xyleneb	200	183	751	934	16.1–13.9
H7	m-xyleneb	200	442	465	907	16.2–14.8

^a. The classical high-NO_x experiments;

^b. the HONO experiments.