Table 3.
Percentage recoveries (n = 3) and matrix effect of spiked LC-MS water, influent and effluent wastewater samples at two different concentration levels (15 and 750 ng/L).
| Pharmaceuticals | Spiked conc. ng/L | LC/MS Water %recovery ± RSD | Influent % recovery ± RSD | ME% | Effluent % recovery ± RSD | ME% |
|---|---|---|---|---|---|---|
| Acetaminophen | 15 | 97.2 ± 5.7 | 98.0±4.5 | 5 | 95.0±5.5 | 3 |
| 750 | 94.4± 2.4 | 97.3±3.9 | 92.3±4.7 | |||
| Sulfapyridine | 15 | 87.3 ± 6.2 | 85.4±6.5 | 7 | 95.4±7.5 | 1 |
| 750 | 92.1± 3.2 | 89.4±4.5 | 91.4±3.6 | |||
| Sulfamethazine | 15 | 92.7 ± 7.3 | 86.3 ± 6.1 | 8 | 97.7 ± 6.4 | −3 |
| 750 | 89.9± 4.5 | 93.6± 3.5 | 104.3± 9.1 | |||
| Sulfadiazine | 15 | 90.8 ± 3.5 | 97.6 ± 6.1 | 4 | 96.1± 9.3 | 5 |
| 750 | 87.5± 3.1 | 79.2± 6.2 | 84.3± 6.6 | |||
| Sulfamethoxazole | 15 | 88.4 ± 5.4 | 97.6 ± 6.9 | −1 | 90.1 ± 6.4 | 7 |
| 750 | 85.2± 3.5 | 93.6± 3.5 | 89.6± 3.6 | |||
| Ciprofloxacin | 15 | 86.9 ± 4.2 | 99.1 ± 7.2 | 3 | 81.6 ± 9.4 | 2 |
| 750 | 88.6±2.8 | 85.3±4.9 | 90.8±5.9 | |||
| Ofloxacin | 15 | 91.5 ± 7.4 | 100.5 ± 5.3 | 6 | 87.4 ± 8.2 | −3 |
| 750 | 86.3±4.7 | 93.6±9.4 | 92.9±6.3 | |||
| Erythromycin | 15 | 93.3 ± 4.6 | 101.9 ± 6.2 | 9 | 84.3 ± 6.9 | 9 |
| 750 | 91.1±2.7 | 88.3±3.8 | 96.3±6.3 | |||
| Metoprolol | 15 | 86.1 ± 1.8 | 80.9 ± 3.3 | 8 | 91.6 ± 6.2 | 8 |
| 750 | 88.4±3.3 | 95.3±5.6 | 80.4±8.1 | |||
| Risperidone | 15 | 84.7 ± 5.6 | 91.3 ± 3.9 | 10 | 79.5 ± 6.1 | 3 |
| 750 | 86.2±2.6 | 94.2±4.2 | 82.8±4.1 |