K | As | Pb | Cd | Cr | Cu | Zn | Hg |
Lower | −0.839 | +0.637 | −0.544 | +0.839 | −0.454 | −0.999* | −0.839 |
Lower middle | −0.018 | +0.5 | −0.866 | +0.356 | −0.866 | −0.075 | +0.866 |
Middle | −0.811 | −0.772 | −0.370 | −0.820 | +0.5 | −0.757 | −1* |
High | −0.994* | −0.993* | +0.356 | +0.300 | −0.851 | 0.962 | −0.999* |