Optimization of preparation process of crocetin from gardenia yellow pigment by orthogonal experiment 
YANG Zhi-qiang, WU Lan, LI Mao-xing, LI Xiao-lin, HAN Tian-xiang, WANG Wei-gang, WANG Peng
NATURAL PRODUCT RESEARCH AND DEVELOPMENT . 2022, (1): 76 -82 .  DOI: 10.16333/j.1001-6880.2022.1.011