Pb

Ni

Fe

Cu

Cr

Cd

Zn

1.000

−0.771^*

−0.853^**

−0.827^**

−0.755^*

0.789^*

0.628

1.000

0.840^**

0.936^**

0.774^*

0.818^**

0.359

1.000

0.844^**

0.757^*

0.884^**

0.382

1.000

0.762^*

0.805^**

−0.566

1.000

0.716^*

0.313

1.000

−0.315

1.000