Table 1.
Influence of microfiltration on the chemical composition of a complex mixture of Alternaria toxins, as obtained by LC-MS/MS analysis. Concentrations are provided in micrograms per liter or milligrams per liter except for STTX-III, where absolute quantification was not possible due to a lack of a reference standard; thus, the respective peak area units (AU) are presented
| AOH (μg/L) | AME (μg/L) | ALT (μg/L) | TeA (mg/L) | TEN (μg/L) | ATX-I (mg/L) | ATX-II (mg/L) | ALP (mg/L) | STTX-III (106 AU) | ALS (μg/L) | AST (mg/L) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Unfiltered | 90.3 | 88.3 | 89.2 | 62.5 | 1.5 | 1.04 | 1.38 | 1.38 | 680 | 25.6 | 2.23 |
| PTFE | 84.4 | 72.7 | 83.3 | 60.1 | 0.9 | 1.05 | 1.35 | 1.30 | 700 | 23.3 | 1.37 |
| PVDF | 68.9 | < 0.06 | 75.8 | 58.0 | 0.8 | 0.79 | 0.69 | 1.03 | 254 | 25.8 | < 0.0002 |
| Nylon | < 0.3 | < 0.06 | 26.0 | 56.3 | 0.8 | < 0.00024 | < 0.001 | < 0.001 | 5 | 8.9 | < 0.0002 |
| PES | < 0.3 | < 0.06 | 15.7 | 59.3 | 0.9 | < 0.00024 | < 0.001 | < 0.001 | 3 | 7.4 | < 0.0002 |
| GF/CA | < 0.3 | < 0.06 | 52.7 | 57.9 | 0.6 | 0.0035 | < 0.001 | 0.006 | 9 | 23.6 | 1.10 |
| RC | 42.9 | 38.8 | 91.7 | 59.1 | 0.7 | 0.98 | 1.34 | 1.32 | 688 | 23.3 | 0.71 |