Sugar contents were detected by a method stated by Hurst, Martin, and Zoumas(1979) An Agilent 1100 series HPLC(Agilent Technologies, USA)consisted of a model G1379A degasser, a model G1311A pump, a model G1316A column oven and model G1315B Refractive Index Detector(RID) system was used. The mobile phase consisted of acetonitrile(75:25, vlv) and the flow rate of 1 mL/min was adjusted. Cosmosil packed column of Sugar-D(4.6 x 250 mm) was used and 20 ul sample was injected. The peaks were identified by comparison of retention times with those of authentic reference substances. Sucrose, glucose and fructose were used as standards and results were expressed as g of sucrose, glucose and fructose equivalent per liter of sample.