Quantitative analysis of some important metals and metalloids in tobacco products by inductively coupled plasma-mass spectrometry (ICP-MS)

Table 7 Principal component loadings

Variable	PC1	PC2	PC3	PC4
Al	0.959	−0.188	0.011	−0.091
Cr	0.725	−0.272	−0.234	0.509
Mn	0.344	0.828	0.157	0.302
Fe	0.940	−0.216	0.055	−0.035
Co	0.964	0.006	0.024	0.084
Ni	0.846	−0.227	−0.139	0.396
Cu	0.169	−0.172	0.891	−0.061
Zn	0.559	0.577	0.231	−0.006
As	0.889	0.103	−0.018	−0.322
Se	0.381	0.415	−0.409	−0.495
Cd	−0.123	0.877	−0.026	0.237
Pb	0.716	0.065	0.053	−0.352
Eigen value	5.896	2.211	1.122	1.056
Variability (%)	49.136	18.422	9.346	8.799
Cumulative Variance (%)	49.136	67.558	76.904	85.704

ISSN: 2661-801X