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 AJAC  Vol.6 No.11 , October 2015
Determination of Rebaudioside A and Stevioside in Leaves of S. rebaudiana Bertoni Grown in México by a Validated HPLC Method
Abstract: Stevia rebaudiana is a plant with high sweetening capacity due to its content of glycosides, mainly stevioside and rebaudioside A. Several techniques have been used to determine the concentrations of glycosides in Stevia, although an HPLC method is recommended by the FAO/WHO-JECFA. Varieties of Stevia have been recently grown in Mexico, with no previous report of glycosides by a validated method. The aim of this study was to validate an isocratic HPLC method for content determination of main glycosides in the leaves of Stevia cultivated in Mexico. HPLC method was performed using a C18 column (250 mm × 4.6 mm, 5 μm) and UV detector set at 210 nm. The mobile phase consisted of 32:68 (v/v) mixture of acetonitrile and sodium-phosphate buffer (10 mmol/L, pH 2.6), set to a flow rate of 1.0 mL/min. Rebaudioside A and stevioside were determined in two Stevia varieties: Morita II and Criolla, and also validation parameters were calculated. Rebaudioside A content (g/100g) in Morita II was 15.15 ± 0.02 while stevioside was 3.97 ± 0.003; in the case of Criolla they were 4.03 ± 0.01 and 8.80 ± 0.14, respectively (p < 0.001). The recoveries of fortified samples were 100% ± 10% and precision RSD was ≤6.27%. The criteria of validation showed accuracy, linearity (≥0.99), and precision; therefore, the determination of glycosides was performed with reliability.
Cite this paper: Aranda-González, I. , Moguel-Ordoñez, Y. and Betancur-Ancona, D. (2015) Determination of Rebaudioside A and Stevioside in Leaves of S. rebaudiana Bertoni Grown in México by a Validated HPLC Method. American Journal of Analytical Chemistry, 6, 878-885. doi: 10.4236/ajac.2015.611083.
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