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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

From: Analysis of chemical constituents in mainstream bidi smoke

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
  1. The data are reported as “mean ± 1 standard deviation” for triplicate measurements
  2. a < DL: Below detection limit