Table 1.
Names and chemical structures of the 21 emerging pollutants used in this study and their LC-MSMS parameters
| Category | Emerging pollutant | Structure | Retention Time (min) | MRM Transition (m/z) | Dwell time (ms) | Frag-mentor Voltage (V) | Collision Energy (V) | Polarity | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Antibiotic | Roxithromycin | ![]() |
11.6 | 837 ➔ 680 | 200 | 135 | 20 | Positive |
| 2 | Lincomycin-HCl | ![]() |
7.6 | 407 ➔ 359 | 200 | 135 | 20 | Positive | |
| 3 | Norfloxacin | ![]() |
8.2 | 320 ➔ 302 | 200 | 135 | 20 | Positive | |
| 4 | Trimethoprim | ![]() |
7.9 | 291 ➔ 230 | 200 | 135 | 20 | Positive | |
| 5 | Sulfamethoxazole | ![]() |
9.3 | 254 ➔ 156 | 200 | 135 | 20 | Positive | |
| 6 | Antidepressant | Venlafaxine-HCl | ![]() |
9.4 | 278 ➔ 260 | 200 | 135 | 10 | Positive |
| 7 | Antioxidant | Caffeic acid | ![]() |
7.8 | 181 ➔ 163 | 200 | 135 | 20 | Positive |
| 8 | Anti-seizure drug | Phenytoin | ![]() |
11.1 | 253 ➔ 182 | 200 | 135 | 10 | Positive |
| 9 | Diuretic drug | Hydrochloro-thiazide | ![]() |
6.4 | 296 ➔ 269 | 70 | 140 | 20 | Negative |
| 10 | Furosemide | ![]() |
11 | 329 ➔ 285 | 70 | 140 | 15 | Negative | |
| 11 | Beta-blocker (high blood pressure drug) | Atenolol | ![]() |
7.1 | 267 ➔ 190 | 200 | 135 | 20 | Positive |
| 12 | Fungicide | Thiabendazole | ![]() |
7.6 | 202 ➔175 | 200 | 135 | 30 | Positive |
| 13 | Herbicide | Prometryn | ![]() |
11.6 | 242 ➔ 158 | 200 | 135 | 30 | Positive |
| 14 | MCPA | ![]() |
12 | 201 ➔ 125 | 200 | 47 | 13 | Positive | |
| 15 | Fluometuron | ![]() |
11.7 | 233 ➔ 72 | 200 | 135 | 30 | Positive | |
| 16 | Histamine H2 receptor antagonist | Cimetidine | ![]() |
6.9 | 253 ➔ 159 | 200 | 135 | 10 | Positive |
| 17 | Insect repellent | DEET | ![]() |
11.9 | 192 ➔ 119 | 200 | 135 | 30 | Positive |
| 18 | Nonsteroidal anti-inflammatory drug (NSAID) | Meloxicam | ![]() |
12.8 | 352 ➔ 115 | 200 | 135 | 6 | Positive |
| 19 | Ibuprofen | ![]() |
14.4 | 207 ➔ 161 | 200 | 135 | 20 | Positive | |
| 20 | Stimulant | Caffeine | ![]() |
7.8 | 195 ➔ 138 | 200 | 135 | 30 | Positive |
| 21 | Vulcanization agent (for rubber) | 2-Mercapto Benzothiazole (MBT) | 10.6 | 168 ➔ 135 | 200 | 135 | 30 | Positive |



















