Optimization and Comparison of Alkali Extraction and Acid Extraction of Bound Polyphenols in Psidium guajava Linn.
LUO Ya-li1,YANG Cong-ying1,XIAO Hang2,CAO Yong3,RAO Li-qun1,GUO Shi-yin2,TANG Zhong-hai2*
NATURAL PRODUCT RESEARCH AND DEVELOPMENT . 2018, (7): 1242 -1251 .  DOI: 10.16333/j.1001-6880.2018.7.025