Table 4.
Interaction factors for DTT and AA consumption in the real-world PM2.5 samples after addition of standard solutions of Cu and Fe metals and of PQN and NPQ quinones.
| IF OPDTT | ||||
| Sample No. | + Fe 1 μM | + Cu 0.17 μM | + PQN 0.17 μM | + NPQ 0.25 μM |
| PM_1 | 0.87 | 1.09 | 1.09 | 1.16 |
| PM_2 | 1.05 | 1.12 | 1.10 | 1.14 |
| PM_3 | 1.09 | 1.21 | 1.14 | 1.20 |
| PM_4 | 0.98 | 1.25 | 1.18 | 1.22 |
| PM_5 | 1.13 | 1.28 | 1.21 | 1.30 |
| PM_6 | 1.15 | 1.32 | 1.29 | 1.49 |
| PM_7 | 1.19 | 1.37 | 1.33 | 1.54 |
| PM_8 | 1.14 | 1.39 | 1.37 | 1.71 |
| mean | 1.10 | 1.25 | 1.23 | 1.35 |
| IF OPAA | ||||
| Sample No. | + Fe 2 μM | + Cu 0.1 μM | + PQN 1 μM | + NPQ 0.1 μM |
| PM_1 | 0.84 | 0.97 | 1.07 | 1.07 |
| PM_2 | 0.75 | 1.04 | 1.14 | 1.41 |
| PM_3 | 0.66 | 1.00 | 1.09 | 1.09 |
| PM_4 | 0.62 | 1.14 | 0.82 | 0.96 |
| PM_5 | 0.65 | 0.98 | 0.68 | 0.84 |
| PM_6 | 0.61 | 1.03 | 0.82 | 0.82 |
| PM_7 | 0.59 | 1.16 | 0.78 | 0.85 |
| PM_8 | 0.51 | 1.10 | 1.04 | 1.04 |
| mean | 0.65 | 1.05 | 0.93 | 1.01 |