Optimization of Alkaline Extraction and Bioactivities of Polysaccharides from Rhizome of Polygonatum odoratum

Table 1

Optimization of alkaline extraction parameters of polysaccharides from P. odoratum.

Number	NaOH concentration (M)	Extraction temperature (°C)	Ratio of NaOH to solid (v/w)	Extraction time (h)	Extraction yield; (%)
1	1 (0.3)	1 (60)	1 (10)	1 (1)	15.11
2	1	2 (70)	2 (15)	2 (2)	14.42
3	1	3 (80)	3 (20)	3 (4)	13.28
4	2 (0.6)	1	2	3	13.16
5	2	2	3	1	8.55
6	2	3	1	2	16.22
7	3 (0.9)	1	3	2	5.65
8	3	2	1	3	15.21
9	3	3	2	1	13.43
𝑘1	14.27	11.31	15.51	12.36
𝑘2	12.64	12.73	13.67	12.10
𝑘3	11.43	14.31	9.16	13.96
𝑅	2.84	3.00	6.35	1.86