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Chemistry and Industry of Forest Products ›› 2023, Vol. 43 ›› Issue (3): 79-88.doi: 10.3969/j.issn.0253-2417.2023.03.010

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Purification of Polysaccharides from Codonopsis pilosula by Macroporous Adsorption Resin and Its Whitening, Moisture Absorption and Moisturizing Properties

Mengru ZHAN1,2,3(), Yanbin WANG1,2,3,*(), Shuhe KANG1,2,3, Xingping LUO1,2,3   

  1. 1. School of Chemical Engineering, Northwest Minzu University, Lanzhou 730106, China
    2. Key Laboratory of Environment-Friendly Composites of the State Ethnic Affairs Commission, Lanzhou 730106, China
    3. Gansu Provincial Biomass Function Composites Engineering Research Center, Lanzhou 730106, China
  • Received:2022-03-04 Online:2023-06-28 Published:2023-06-27
  • Contact: Yanbin WANG E-mail:729255126@qq.com;ybwang@126.com

Abstract:

On the basis of static experiments, the purification effects of polysaccharides on 14 kinds of macroporous adsorption resins(S-8, ADS-F8, LSA-21, LSA-10, HP-20, ADS-17, NKA-9, DM130, AB-8, X-5, H103, D101, XAD-8, DA201) from Codonopsis pilosula(Franch.) Nannf. extraction were compared, and the better resin ADS-F8 was selected for dynamic adsorption. Based on the single factor experiments, the weighted comprehensive score of polysaccharides retention rate, decolorization rate and protein removal rate were used as the response values, and the response surface methodology was used to optimize the purification conditions of C. pilosula polysaccharide by macroporous resin. Meanwhile, the whitening activity, moisture absorption and moisture retention of the purified polysaccharides were tested. The results showed that the optimal purification conditions were as follows: loading concentration of 1 g/L, eluting volume of 150 mL, flow rate of 100 mL/h, and sample volume of 150 mL. Under these conditions, the comprehensive score of purification was (73.12±0.06)%(n=3), which was close to the predicted value of 73.02%. The purified polysaccharides had favorable whitening activity, and the half inhibitory mass concentration(IC50) value of tyrosinase monophenase was 3.20 g/L, which was similar to the inhibitory effect of whitening agent phenylethylresorcinol. The IC50 value of bisphenolase was 7.96 g/L, which is higher than phenylethylresorcinol of 0.73 g/L. When the air humidity was 43%, the purified polysaccharide showed strong hygroscopicity, and the highest moisture absorption rate was 123.01% at 12 h. In four air humidity conditions, the purified polysaccharides, crude polysaccharides and their mixture with a volume ratio 1∶1 to glycerol all had high moisture retention, especially, the moisturizing property of the mixture was better, and the moisturizing rate reached 99.95% within 12 h, which was significantly better than that of purified polysaccharide and crude polysaccharide.

Key words: Codonopsis pilosula(Franch.) Nannf., polysaccharides, macroporous adsorption resin, response surface method, whitening activity, hygroscopicity, moisture retention

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