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Software has been used to predict metabolic pathways for possible ‘expected’ and ‘unexpected’ metabolites based on their m/z and fragmentation patterns from low- and high-fragmentation mass spectra of plants subjected to carbamazepine uptake has been used.
Three plants with high prevalence in the natural protected area of Doñana National Park (Spain) were irrigated with three aqueous carbamazepine solutions (10 ng‧mL-1, 700 ng‧mL,-1 and 10 μg‧mL-1). Periodically, stems, leaves, and roots were sampled and analyzed. Total carbamazepine uptake throughout the assay was evaluated and discussed, demonstrating a clear dependence on plant species/part, irrigation solution concentration, and assay duration. Additionally, chromatographic analysis was performed using a quadrupole time-of-flight (Q-TOF) mass spectrometer, recording simultaneous low and high-fragmentation mass spectra for further computational processing with MetabolynxTM software.
Confirmation was achieved by analyzing the high-energy spectra obtained at the characteristic retention times and fragmentation pattern of each compound.
Several potential carbamazepine metabolites corresponding to various metabolic pathways were identified, and, where possible, their relative abundances was discussed.
The use of computational tools like MetabolynxTM has proven to be useful for studies involving the identification of metabolites and/or the confirmation of metabolic pathways in the studied plants.
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