Determining the Levels of Volatile Organic Pollutants in Urban Air Using a Gas Chromatography-Mass Spectrometry Method

Table 2

Values of the BTEX concentrations found in street air, during winter season, between: 17:00 and 20:00. 𝑁_𝑎𝑣: average number of vehicles per minute, during sampling. Analytes: B (benzene), T (toluene), E (ethyl-benzene), X m, p, o (xylenes) T/B: toluene/benzene ratio.

Crt. Nr.	Sampling site		𝑁avVeh/min	B 𝜇g/m^3	T 𝜇g/m^3	E 𝜇g/m^3	m,p-X 𝜇g/m^3	o-X 𝜇g/m^3	T/B
1			25	21.4	71.9	22.7	61.4	39.6	3.4
2	Horea street		26	21.2	64.1	19.4	45.6	33.4	3.0
3			15	22.2	62.2	18.6	50.0	35.2	2.8
4		Limit		8.8	53.9	8.5	15.8	27.4	6.1
5	Central Park	10 m inside	19	7.8	42.72	8.2	12.1	26.6	5.4
6		50 m inside		7.7	31.9	6.7	9.9	23.4	4.1
7			30	10.5	56.0	11.7	16.2	35.2	5.3
8	Aurel Vlaicu street		43	10.5	33.7	10.6	18.1	32.0	3.2
9			33	11.0	18.6	8.2	12.9	25.8	1.6