Objective: To establish a reliable High Performance Liquid Chromatography method with photodiode array detection (HPLC-PDA) and a suitable extraction method for identification and quantification of Aristolochic acid I (AA-I) in 3 different sample types. i. e. Aristolochia tagala Cham. https://www.herbsdailyes.shop/product-category/analgesic-balms/