Table 2.

The Box–Behnken design and the yield of Ramaria botrytis polysaccharide

Run	X 1/water to raw material ratio (mL g−1)	X 2/extraction temperature (°C)	X 3/extraction time (h)	Extraction yield (%)	Predicted yield (%)
1	10 (−1)	90 (1)	1.5 (0)	9.10	9.11
2	20 (1)	70 (−1)	1.5	6.47	6.46
3	20	80 (0)	2.0 (1)	7.97	7.82
4	15 (0)	80	1.5	8.57	8.81
5	15	80	1.5	8.45	8.81
6	15	70	1.0 (−1)	6.50	6.25
7	20	90	1.5	9.90	9.80
8	15	80	1.5	8.87	8.81
9	15	70	2.0	6.20	6.36
10	15	80	1.5	9.07	8.81
11	15	90	2.0	9.60	9.85
12	10	80	1.0	6.70	6.86
13	10	80	2.0	7.28	7.02
14	10	70	1.5	5.97	6.07
15	15	90	1.0	9.30	9.14
16	20	80	1.0	6.90	7.16
17	15	80	1.5	9.07	8.81