
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.
In this application, an SPE method is implemented for a panel of pain relievers to produce acceptable results to offer an alternative solution for high recoveries and to reduce matrix effects.






