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Table 5 Concentration of heavy metals in leaf samples of medicinal plants

From: Investigation of heavy metals in frequently utilized medicinal plants collected from environmentally diverse locations of north western India

   Mean heavy metal concentration in leaf samples (ppm)
S/N Plant species Mn Cr Pb Fe Cd Ni Co Zn Hg
1 Acacia nilotica 3.16 ± 0.0371 8.73 ± 0.0260* 0.21 ± 0.0208 16.01 ± 0.0642 BDL 0.59 ± 0.0202 0.19 ± 0.0284 3.09 ± 0.0305 BDL
2 Bacopa monnieri 1.67 ± 0.0425 13.19 ± 0.0480* 0.54 ± 0.0417 14.19 ± 0.0633 0.03 ± 0.0088 0.23 ± 0.0317 0.15 ± 0.0115 4.80 ± 0.0907 BDL
3 Commiphora wightii 2.84 ± 0.0688 8.53 ± 0.0317* 0.21 ± 0.0145 13.30 ± 0.0264 BDL 0.26 ± 0.0348 0.20 ± 0.0200 2.10 ± 0.0173 BDL
4 Ficus religiosa 2.60 ± 0.0392 9.54 ± 0.0202* 0.32 ± 0.0240 12.42 ± 0.0272 0.03 ± 0.0057 0.30 ± 0.0296 0.14 ± 0.0120 3.25 ± 0.0240 BDL
5 Glycyrrhiza glabra 2.23 ± 0.0305 9.17 ± 0.0173* 0.32 ± 0.0233 11.33 ± 0.0296 0.03 ± 0.01660 0.38 ± 0.0233 0.40 ± 0.0251 3.89 ± 0.0348 BDL
6 Hemidesmus indicus 2.26 ± 0.0260 11.68 ± 0.0480* 0.25 ± 0.0088 13.64 ± 0.0115 0.16 ± 0.0260 0.32 ± 0.0173 0.16 ± 0.0251 4.18 ± 0.0212 BDL
7 Salvadora oleoides 0.89 ± 0.0458 10.48 ± 0.0440* 0.52 ± 0.0202 11.03 ± 0.0497 BDL 0.48 ± 0.0193 0.15 ± 0.0208 4.40 ± 0.0240 BDL
8 Terminalia bellirica 2.60 ± 0.0348 11.02 ± 0.0808* 0.25 ± 0.0120 13.21 ± 0.0202 0.21 ± 0.0176 0.26 ± 0.0257 0.18 ± 0.0145 3.28 ± 0.0145 BDL
9 Terminalia chebula 2.04 ± 0.0264 11.23 ± 0.0887* 0.48 ± 0.0290 14.59 ± 0.0352 0.02 ± 0.0120 0.57 ± 0.0264 0.17 ± 0.0264 2.58 ± 0.0237 BDL
10 Withania somnifera 0.34 ± 0.0152 12.34 ± 0.0458* 0.81 ± 0.0360 17.44 ± 0.0202 0.04 ± 0.0274 0.19 ± 0.0371 0.14 ± 0.0135 4.10 ± 0.0360 BDL
  1. *Beyond permissible limit defined by WHO.