A high-resolution UHPLC analysis of xanthones present in the extracts of the pericarp of mangosteen (Garcinia mangostana L.) was carried out on an Agilent 1290 Infinity II LC. Excellent resolution and peak capacity (300 calculated at half height) were obtained within a total analysis time, including column reconditioning, of 16.5 minutes. The main xanthone (α-mangostin) was quantified in two ex...