Separation and preparation of the chemical components of Rheum officinale Baill.by pH-zone-refining counter-current chromatography and HSCCC
WU Qiu-xia, SUN Chang-lei, WANG Xiao, ZHOU Jie, ZHENG Zhen-jia, YANG Bing-tian, SUN Wei-hong
Shandong Science . 2015, (1): 1 -6 .  DOI: 10.3976/j.issn.1002-4026.2015.01.001

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