86 of these could be quantified. Amantadine and 8-hydroxyquinoline concentrations were too low to be quantified. A further 6 compounds were identified at Level 2a. These results are summarized in Table and 2. Among the detected compounds, only seven were detected in both positive and negative ionization: diclofenac, fluconazole, irbesartan, losartan, niflumic acid, oxazepam, and valsartan (further identifiers are provided in the SI,