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Table 1 Environmental and biological monitoring

From: Evaluation of immunological, inflammatory, and oxidative stress biomarkers in gasoline station attendants

 Non-exposed group (n = 28)GSA group (n = 38)ACGIH limits
Benzene (μg m− 3)43.3 (35.3–63.3)105.9 (63.3–216.8)a1600.0
Toluene (μg m− 3)107.4 (85.9–201.3)311.5 (207.7–578.2)a75,260.0
o-Xylene (μg m− 3)37.5 (23.0–224.4)59.4 (29.5–433.2)a 
m-Xylene (μg m− 3)20.1 (17.4–25.6)32.5 (27.8–37.4)a433,540.0*
p-Xylene (μg m− 3)21.2 (18.4–27.0)31.0 (22.2–34.6)a 
t,t-MA (μg g− 1 creatinine)74.8 (47.6–121.5)421.9 (292.2–694.6)a500.0
HA (g g− 1 creatinine)0.3 (0.2–0.4)0.3 (0.2–0.6)1.6
m-HA (g g− 1 creatinine)n.d.n.d.1.5
  1. The values are expressed as median (interquartile range)
  2. t,t-MA trans,trans-muconic acid, HA hippuric acid, mHA methylhippuric acid, n.d. not detectable
  3. *total value to the sum of xylene isomers
  4. ap < 0.001