Table 4 Principal component analysis results for the PM2.5, trace metal concentrations, and magnetic parameters (loadings > 0.6 are shown in bold).
From: Trace metals and magnetic particles in PM2.5: Magnetic identification and its implications
Factor | Component | |||
|---|---|---|---|---|
1 | 2 | 3 | 4 | |
PM2.5 | −0.441 | 0.470 | 0.418 | 0.263 |
As | 0.678 | −0.324 | 0.208 | 0.269 |
Cd | 0.517 | 0.442 | −0.063 | −0.186 |
Co | 0.414 | −0.482 | 0.147 | −0.078 |
Cr | 0.735 | −0.521 | −0.069 | 0.132 |
Cu | 0.763 | −0.436 | 0.136 | 0.215 |
Mn | 0.696 | −0.100 | 0.400 | −0.055 |
Ni | 0.213 | −0.307 | 0.714 | 0.417 |
Pb | 0.757 | 0.071 | 0.052 | 0.080 |
Ti | 0.561 | −0.393 | −0.212 | −0.164 |
Sr | 0.682 | −0.335 | −0.035 | 0.338 |
V | 0.596 | −0.365 | −0.088 | −0.187 |
Zn | 0.798 | −0.165 | −0.069 | −0.057 |
Fe | 0.808 | 0.373 | 0.130 | 0.041 |
χLF | 0.530 | 0.762 | 0.104 | −0.302 |
SIRM | 0.577 | 0.758 | −0.064 | −0.201 |
HIRM | 0.506 | 0.829 | 0.020 | −0.016 |
χARM | 0.422 | 0.808 | 0.183 | −0.278 |
χARM/χLF | −0.383 | 0.048 | 0.393 | 0.231 |
χARM/SIRM | −0.302 | −0.125 | 0.851 | −0.229 |
SIRM/χLF | 0.083 | 0.091 | −0.755 | 0.481 |
S-ratio | −0.064 | −0.722 | −0.005 | −0.601 |
L-ratio | 0.032 | 0.592 | 0.031 | 0.586 |
Initial Eigenvalues | 7.040 | 5.284 | 2.515 | 1.860 |
% Variance | 30.61 | 22.97 | 10.94 | 8.09 |
Cumulative % | 30.61 | 53.58 | 64.52 | 72.61 |
