Identification of Anthocyanins and Optimization of Their Extraction from Rabbiteye Blueberry Fruits in Nanjing

Table 1

Box–Behnken design of various factors and their coding levels.

Factor	Coding level
	−1	0	1
(A) Extraction time (h)	0.5	12.25	24
(B) Ethanol concentration (%)	50	72.5	95
(C) Liquid-to-solid ratio (ml/g)	5 : 1	12.5 : 1	20 : 1