Na

K

Mg

Ca

Fe

Zn

Mn

Pb

Na

1

K

−0.517*

1

Mg

0.180

−0.773**

1

Ca

−0.780**

−0.034

0.213

1

Fe

−0.120

−0.750**

0.787**

0.588*

1

Zn

−0.794**

0.011

0.274

0.921**

0.490

1

Mn

−0.542*

−0.243

0.408

0.667**

0.755**

0.537*

1

Pb

0.137

−0.218

−0.140

0.131

0.145

0.001

0.001

1