Abstract:To provide a theoretical basis for the processing and utilization of potatoes in Shanxi province，a method for determining the content of 4 kinds of soluble sugars in different varieties of potatoes was established，and the soluble sugar content in 17 varieties of potatoes in Shanxi province was clarified.The column was Zorbax Carbohydrate （4.6 mm×250 mm，5 μm），and the mobile phase was acetonitrile and water （70∶30，volume ratio），with 0.9 mL/min of the flow rate.The injection volume was 20 μL，and the column temperature was 35 ℃.Under such conditions，the 4 kinds of soluble sugars achieved good separation within 15 min.The correlation coefficients of the standard curves were all greater than 0.999，and the relative standard deviation（RSD）of the severity rate，stability，precision，and recovery rate were all within 5%，indicating that the determination method was good.The total content of soluble sugar of 17 kinds of potatoes was 370.95 mg/100 g-4 497.24 mg/100 g，and the reducing sugar content was 63.09 mg/100 g-2 727.03 mg/100 g.Fructose content was 63.09 mg/100 g-1 272.67 mg/100 g，and glucose content was 33.11 mg/100 g-1 409.66 mg/100 g.Maltose content was 40.29 mg/100 g-147.28 mg/100 g，and sucrose content was 25.11 mg/100 g-1 770.21 mg/100 g.The composition of soluble sugar in different varieties of potatoes was similar，but the content varied greatly.