Table 1 The Elemental concentrations in μg/ml of five different groups. The Values given in column 2 are the certified concentrations (reference standard A13) of various elements.

K

2500 ± 350

3714 ± 0.03^a

5440.6 ± 0.02^b

3810.5 ± 0.04^c

3805.0 ± 0.04^c

3782.5 ± 0.01^d

Ca

286 ± 53

269.7 ± 0.07

119.1 ± 0.03^b

242.5 ± 0.02^c

247.6 ± 0.02^c

261.9 ± 0.022^d

Mn

1.4 ± 1

1.6 ± 0.06

2.0 ± 0.05^b

1.5 ± 0.023^c

1.8 ± 0.01^c

1.6 ± 0.01^d

Fe

356 ± 150

370.5 ± 0.04

577.5 ± 0.04^b

392.7 ± 0.03^c

387.0 ± 0.06^c

379.8 ± 0.02^d

Cu

2.3 ± 0.5

1.5 ± 0.06

0.89 ± 0.05^b

0.98 ± 0.06^c

0.96 ± 0.02^c

1.2 ± 0.01^d

Zn

13.0 ± 10

18.9 ± 0.01

9.0 ± 0.06^e

17.9 ± 0.02^f

17.3 ± 0.04^f

18.4 ± 0.04^g

Se

0.24 ± 0.5

0.18 ± 0.04

0.19 ± 0.03^b

0.10 ± 0.07^c

0.16 ± 0.05^c

0.18 ± 0.07^d

Pb

0.18 ± 0.01

0.21 ± 0.03

0.25 ± 0.04^m

0.22 ± 0.02ⁿ

0.24 ± 0.03ⁿ

0.22 ± 0.03^l