Preparation of the certified reference material of Echinacoside
WANG Tingting, ZHAO Min,WANG Daijie, ZHENG Yuanyuan,REN Hanshu, GENG Yanling
SHANDONG SCIENCE . 2016, (1): 14 -20 .  DOI: 10.3976/j.issn.1002-4026.2016.01.003