Table 1

Metal	Location	Range (mg/kg DW ± SD)	Mean content (mg/kg DW ± SD)	WHO Permissible level
Pb	Tehran	29.91± 0.02 - 33.46 ± 0.04	31.21 ± 0.04	10
Pb	Beijing	14.81 ± 0.05- 25.11 ± 0.03	16.21± 0.04	10
Cd	Tehran	4.87 ± 0.05 - 11.37± 0.02	9.67 ± 0.03	0.3
Cd	Beijing	1.28 ± 0.03-4.82± 0.03	2.77 ± 0.03	0.3
Ni	Tehran	15.77 ± 0.07- 25.66± 0.03	22.96 ± 0.12	---
Ni	Beijing	22.11 ± 0.04-31.71 ± 0.03	25.16 ± 0.03	---
Zn	Tehran	36.19 ± 0.17- 44.22 ± 0.11	41.79 ± 0.15	100
Zn	Beijing	33.17 ± 0.13-40.19 ± 0.16	37.12 ± 0.15	100
Cr	Tehran	29.47 ± 0.04- 36.72 ± 0.07	34.26 ± 0.05	2
Cr	Beijing	8.98 ± 0.04-8.98 ± 0.04	37.12 ± 0.15	2
Cu	Tehran	5.44 ± 0.05- 11.27 ± 0.06	8.11 ± 0.06	100
Cu	Beijing	40.19 ± 0.16-10.17 ± 0.05	7.39 ± 0.04	100

Table 1: Average and minimum and maximum of metals (mg/kg DW ± SD) in Panax Ginseng samples purchased from Tehran and Beijing local herbal markets in 2012.