Publications by authors named "Agnieszka Krzyszczak-Turczyn"
In this work, new sorbents for the purification of anthocyanin-rich extracts were evaluated. Copolymers of 4-vinylpyridine crosslinked with trimethylolpropane trimethacrylate (poly(4VP-co-TRIM)) or 1,4-dimethacryloyloxybenzene (poly(4VP-co-14DMB)) were tested for their potential to capture polyphenols. Copolymers were obtained by seed swelling polymerization in the form of microspheres with permanent porous structure - attractive features of sorbents used for sample purification by dispersive solid phase extraction.
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- Tryptophan and its metabolite kynurenine are important for various biological processes, sparking interest in their detection methods in biological samples.
- This study highlights the effectiveness of two specially designed polymers for cleaning human serum, specifically poly(4VP-co-TRIM), which effectively reduces interference during the measurement of tryptophan and kynurenine using liquid chromatography-mass spectrometry (LC-MS).
- Results showed that poly(4VP-co-TRIM) achieved good recovery rates (76% for tryptophan and 87% for kynurenine) and outperformed some common commercially available sorbents in minimizing matrix effects.
During biochar preparation or application some toxic substances may be formed. The established limitations of the content of polycyclic aromatic hydrocarbons (PAHs) aim to monitor the fate of PAHs in the life cycle of biochar. The latest studies have revealed that besides PAHs, some of their derivatives with confirmed toxicity are formed.
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- - 57 honey samples from various types and origins, mainly in Poland, were tested for nicotine and nine specific mycotoxins known to be harmful.
- - Honey underwent physicochemical analysis for attributes like color, water content, and total phenolics and flavonoids using established scientific methods.
- - Approximately one-third of the samples contained either nicotine or mycotoxins, but the contamination levels did not correlate with the physicochemical properties of the honey.