HPLC-ELSD analysis of 18 platycosides from balloon flower roots (Platycodi Radix) sourced from various regions in Korea and geographical clustering of the cultivation areas

► HPLC-ELSD method to analyse platycosides from the balloon flower root was developed. ► The method was suitable for the analysis of 18 platycosides for quality control. ► Roots of balloon flower could be clustered into three groups based on platycoside content. ► Classification of Platycodi Radix was associated to the geographical location of cultivation area.