
High-performance liquid chromatography-tandem mass spectroscopy (HPLC–MS/MS) chromatography reveals pyrrolizidine alkaloids (PA)/pyrrolizidine alkaloid N-oxides (PANO) toxin risks in 63 tea samples.
Efficient and reproducible separation of thymidine oligomers is achieved using an ion-pair reversed phase shallow gradient method with the Avantor® ACE® Oligo column.






