Table 3.

Matrix of principal component analysis of the bioconcentration factor values of heavy metals in vegetables

	PC1	PC2	PC3
Hg	0.833	0.127	0.221
Cd	−0.300	0.593	0.621
Pb	0.298	0.587	−0.638
Cr	−0.266	0.727	−0.061
As	0.839	0.108	0.209
Eigenvalue	1.65	1.25	0.89
Variation (%)	33.0	25.1	17.8
Cumulative variation (%)	33.0	58.1	75.9