Quantitative analysis of phenolic compounds in Chinese hawthorn (Crataegus spp.) fruits by high performance liquid chromatography-electrospray ionisation mass spectrometry

► An HPLC-ESI-MS-SIR method was applied to quantify the phenolic compounds of hawthorn fruits. ► Phenolic compounds in 22 hawthorn samples belonging to four species/varieties were determined. ► Significant differences of contents of phenolic compounds between hawthorn species were found.