Table 5.

The extraction methods of polysaccharide in CX.

Extraction method	Optimum technology	Extraction rate (%)	Ref.
Ultrasonic	Ultrasonic time: 40 min; ultrasonic power: 400 W; solid to liquid ratio: 1:10; extraction times: 2	2.74	[176]
Pectinase	Compound pectinase: 1%; temperature: 60 °C; pH value: 3.5; the heating time: 150 min	11.3	[177]
Basic	Extraction temperature: 95 °C; Extraction time: 150 min; the concentration of NaOH: 0.8 mol/L; solid to liquid ratio: 1:200 g/mL	2.69	[178]
Enzymic	Cellulase: 0.15%; the compound pectinase: 10%; time: 210 min; pH: 3.4; temperature: 60 °C	3.03	[179]
Microwave assisted	Microwave power: 231 W; solid to liquid ratio: 1:40; extraction time: 10 min	3.06	[180]
Cellulose enzymic	Cellulase: 0.25%; time: 120 min; pH value: 4.0; temperature: 50 °C.	7.26	[181]
Basic	Extraction temperature: 90 °C; extraction time: 4 h.	6.7	[182]