Table 5.

Concentrations (μg/bidi) of polar compounds for different size fractions of the particulate phase of bidi smoke as measured by GC–MS analysis

Compound	Filter
	A (> 2.50 μm)	D (0.25–0.50 μm)	L (< 0.25 μm)
2-Methylphenol	0.65 ± 0.22	1.96 ± 0.17	13.26 ± 2.25
4-Methylphenol	3.35 ± 0.28	9.83 ± 3.14	15.93 ± 1.41
2-Methoxyphenol	1.20 ± 0.35	< DLa	45.33 ± 7.63
Indole	< DL	< DL	25.80 ± 4.94
Phytol	< DL	0.65 ± 0.06	20.86 ± 6.99
2,3-Dipyridyl	< DL	2.33 ± 0.21	46.74 ± 6.35
3-(3,4-dihydro-2H-pyrrol-5-yl)pyridine	0.67 ± 0.16	2.52 ± 0.67	52.08 ± 12.07
1H-Indole, 3-methyl	0.40 ± 0.01	0.38 ± 0.057	12.64 ± 1.075
Cotinine	0.30 ± 0.06	0.60 ± 0.12	32.60 ± 3.49
Vitamin E	< DL	0.74 ± 0.12	28.30 ± 4.83
Alpha-amyrin	2.30 ± 0.75	< DL	60.73 ± 4.49
Beta-amyrin	0.80 ± 0.22	< DL	56.36 ± 1.89

The data are reported as “mean ± 1 standard deviation” for triplicate measurements

^a < DL: Below detection limit