Table 4: TGM in the laboratory ambient air where “Au” stands for gold-coated sand.

SampleHg (ng m−3)
Au Au/TiO2

1st floor (L1)7.07.8
7.810.0
8.512.5
Mean ± SD

2nd floor (L2)6.86.8
8.57.9
9.88.9
Mean ± SD

3rd floor (L3)4.85.1
6.25.9
7.97.0
Mean ± SD

Roof (R) 5.83.2
8.39.2
11.615.0
Mean ± SD