Table 2 PCA results of HMs in purple soil.

From: Ecological risk and spatial distribution, sources of heavy metals in typical purple soils, southwest China

Variable

Hg

As

Pb

Cd

Zn

Ni

Cr

Cu

Eigenvalues

% of variance

Cumulative %

PC1

0.966

0.803

0.790

0.521

− 0.136

0.392

0.361

0.647

3.19

39.9

39.9

PC2

− 0.030

0.198

0.229

0.376

0.912

0.870

0.808

0.647

2.89

36.2

76.1

  1. Significant values are in [bold].
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