Establish an analytical method for the separation and detection of sucrose, glucose and lactose in milk candy by ion chromatography. The METROSEP CARB 1 (150mm × 4.0mm) anion exchange separation column and pulsed amperometric detector were used to optimize the elution separation conditions. Make sure the column temperature is 32 ℃, the eluent is 37.0mmol / LNaOH solution, the eluent flow rate is 1.0mL / min, and the total analysis time is 20min. In the range of 1.0 ～ 60.0mg / L, sucrose, glucose and lactose showed good linearity, the correlation coefficients were 0.9996, 0.9998 and 0.9996, the detection limits were 0.091, 0.014 and 0.083mg / L, and the RSD was 1.42% to 5.17% The recovery rate is 91.27% ～ 101.31%. The test results showed that the white rabbit milk sugar contained glucose 1.56%, sucrose 21.40%, fructose 3.75%; Wangzi milk sugar contained glucose 1.17%, sucrose 30.29%, fructose 3.30%; golden monkey milk sugar contained glucose 1.08%, sucrose 20.86 %, Fructose 3.31%. This method has been used to detect three sugars in milk sugar. The effect is good. At the same time, it has the advantages of simple operation, accurate results, fast and effective, and can provide a simple and effective method for the detection of milk sugar.
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