主成分

Cu

Zn

Co

Ni

Cr

Pb

Hg

PC1

0.078

−0.104

0.931

0.941

0.275

−0.561

0.481

PC2

−0.537

0.783

0.165

0.147

−0.074

0.614

0.408

PC3

−0.183

−0.261

−0.202

−0.219

0.842

0.099

0.426