Sample

Heavy Metals

Zn

Mn

Cd

Pb

Co

Ni

Cr

S₁

13.840 ± 0.0007

3.728 ± 0.0040

0.012 ± 0.0003

0.011 ± 0.0001

ND

ND

ND

S₂

19.435 ± 0.0008

3.728 ± 0.0004

0.023 ± 0.0002

0.050 ± 0.0001

ND

ND

ND

W₁

12.949 ± 0.0006

0.125 ± 0.0004

0.018 ± 0.0001

ND

ND

ND

ND

W₂

17.065 ± 0.0009

0.289 ± 0.0004

0.022 ± 0.0002

ND

ND

ND

ND

V₁

35.721 ± 0.0008

21.837 ± 0.0006

0.028 ± 0.0001

ND

ND

ND

ND

V₂

11.177 ± 0.0011

3.320 ± 0.0005

0.024 ± 0.0002

0.225 ± 0.0008

ND

ND

ND