Optimization of extraction process of hazelnut green skin polysaccharides and evaluation of their antioxidant activity
The experiment aimed to optimize the extraction process of hazelnut green peel polysaccharides and study their antioxidant activity.Based on single-factor experiments,the water extraction process of hazelnut green peel polysaccharides was optimized using response surface design.The structure was analyzed using ultraviolet spectroscopy(UV)and Fourier-transform infrared spectroscopy(FT-IR),and its antioxidant activity was evaluated.The results showed that under the conditions of a liquid-to-material ratio of 56 mL/g,extraction temperature of 65 ℃,and extraction time of 140 min,the polysaccharide extraction rate was(5.15±0.27)％,which was comparable to the predicted value of the model.The FT-IR results indicated the presence of characteristic absorption signals of polysaccharides in hazelnut green peel polysaccharides.Hazelnut green peel polysaccharides had the ability to scavenge DPPH and ABTS radicals and exhibit significant iron reduction capacity.The study indicates that the response surface optimization of the water extraction process for hazelnut green peel polysaccharides is feasible and can provide a reference for subsequent extraction production and application research of hazelnut green peel polysaccharides.
hazelnut green skin polysaccharidesoptimization by response surface methodologystructural characterizationantioxidant activity
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