
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.
Peptides are extracted from plasma comparing Strata-X PRO SPE to two types of ion exchange polymeric sorbent. Strata-X PRO provides high recoveries with a fast and effective clean-up method.






