Structural Characterization, Antioxidant Activity, and Biomedical Application of Astragalus Polysaccharide Degradation Products

Table 1

Physicochemical properties and FT-IR characteristic absorption peaks of original and degraded APS.

	H2O2 concentration (%)	Mean molecular weight (Mr/Da)	–COOH content (%)	Relative intensity of −COOH absorption peak	Functional group characteristic absorption peak
					−OH	−COOH	−CH2	Sugar ring
APS0	0	11.03	16.8	1.4	3394.8	1617.1	2927.4	1115.5, 1087.4, 1030.5, 763.5
APS1	4	8.39	16.7	1.2	3393.7	1618.1	2931.3	1106.1, 1082.8, 1022.8, 764.8
APS2	6	4.72	17.2	1.6	3392.7	1616.7	2932.9	1110.8, 1081.9,1023.6, 762.5,
APS3	14	2.60	16.2	1	3396.3	1622.1	2930.8	1113.7, 1082.1, 1027.7, 761.9

(100-T_APS0) : (100-T_APS1) : (100-T_APS2) : (100-T_APS3), where T represents the light transmittance.