Sample

Concentration in ppm

Hg

Pb

As

Cd

AS1

13.62 ± 1.38

13.83 ± 0.46

7.75 ± 0.25

ND

AS2

8.52 ± 0.06

10.46 ± 3.38

2.14 ± 0.64

ND

AS3

ND

9.57 ± 1.37

2.38 ± 0.89

ND

AS4

7.50

12.23 ± 0.84

2.63 ± 0.24

ND

AS5

5.79 ± 1.15

7.16 ± 1.95

2.15 ± 0.29

ND