cqvip:[Objectives]Polysaccharides in common fruits were determined and compared.[Methods]Polysaccharides in fresh bananas,apples,grapes and strawberries purchased from local markets were extracted using water extraction-alcohol precipitation method and determined using 3,5-dinitrosalicylic acid(DNS)method.[Results]The content of polysaccharides in banana was relatively high.The optimal conditions for DNS colorimetry were as follows:measurement wavelength of 510 nm,color developer of 1.0 mL,color development temperature of 90℃,color development time of 5min and stabilization time within 30 min.[Conclusions]The reproducibility and recovery rate of this method are ideal.It shows that the method is highly precise and is helpful for the research of fruit polysaccharides.This study provides a certain reference value for the development and application research of fruit polysaccharide resources in China.
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