Table 2 Magnetic parameters for the PM2.5 samples.
From: Trace metals and magnetic particles in PM2.5: Magnetic identification and its implications
Magnetic properties | All samples | Summer | Winter | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mean | S.D. | Min | Max | Mean | S.D. | Min | Max | Mean | S.D. | Min | Max | |
χLF (×10−8m3/kg) | 626.7 | 425.3 | 130.8 | 1900 | 603.7 | 224.7 | 320.9 | 1047 | 649.6 | 565.4 | 130.8 | 1900 |
χARM (×10−8m3/kg) | 1077 | 716.5 | 244.4 | 3209 | 976.3 | 337.8 | 474.7 | 1587 | 1179 | 958.2 | 244.4 | 3209 |
SIRM (×10−5Am2/kg) | 51983 | 34153 | 10073 | 146957 | 54182 | 21395 | 24008 | 105970 | 49784 | 43890 | 10073 | 146957 |
HIRM (×10−5Am2/kg) | 1603 | 1307 | 168.8 | 5965 | 1499 | 738.5 | 704.0 | 3687 | 1709 | 1715 | 168.8 | 5965 |
χARM/χLF | 1.760 | 0.307 | 1.250 | 2.477 | 1.644 | 0.275 | 1.250 | 2.420 | 1.876 | 0.298 | 1.297 | 2.477 |
χARM/SIRM (×10−5mA−1) | 21.91 | 6.383 | 14.25 | 44.16 | 18.60 | 4.222 | 14.25 | 28.55 | 25.23 | 6.535 | 14.28 | 44.16 |
SIRM/χLF (×103Am−1) | 839.5 | 160.4 | 338.8 | 1215 | 900.2 | 116.7 | 646.5 | 1043 | 778.7 | 177.3 | 338.7 | 1215 |
S-ratio | 97.11 | 0.685 | 95.43 | 98.32 | 97.27 | 0.415 | 96.33 | 98.07 | 96.94 | 0.857 | 95.43 | 98.32 |
L-ratio | 0.221 | 0.038 | 0.146 | 0.304 | 0.216 | 0.027 | 0.171 | 0.255 | 0.227 | 0.047 | 0.146 | 0.304 |
