摘要
目的建立反相高效液相色谱法(RP.HPLC)测定甜叶菊中莱鲍迪苷A(RA)和甜菊糖苷(ST)的含量。方法采用welchMaterials XB—C18柱(250mm×4.6mm,5μm),以乙腈.10mmol·L^-1磷酸酸钠缓冲液(pH=2.67,35:65,v~)为流动相,流速0.7mL·min^-1,检测波长210nm,柱温30℃,进样量5此。结果以外标法定量,RA和sT均在O.25~2.50mg·mL^-1与峰面积线性关系良好,r〉0.9995。RA回收率为100.3%,RSD为2.3%(n=6),ST回收率为101.0%,RSD为2.5%(n=6)。结论本方法快捷、准确、可靠,易操作,可用于甜叶菊及相关产品中RA和ST含量测定。
Objective To establish a method for the determination of rebaudioside A (RA) and stevioside (ST) in leaves of Stevia rebaudiana by RP-HPLC. Methods The chromatographic separation was used with a Welch Materials C18 column (4.6 mm× 250 mm, 5 μm). The mobile phase was composed of acetonitrile and 10 mmol. L^ - 1 phosphate sodium acetate buffer (35 : 65, v/v, the pH adjusted to 2.67 with phosphoric acid), the flow rate was 0.7 mL . min^- 1and the detection wavelength was set at 210 nm. The sample injection volume was 5μL and the temperature of column was 30 ℃ . Results Both RA and ST showed a good linear relationship (r 〉 0.999 5) at 0.25 -- 2.50 mg . mL^ -1 and the recovery of RA and ST was 100.3% and 100.7%, respectively. Conclusion RP-HPLC method is simple, sensitive and reliable for the determination of RA and ST in stevia rebaudiana and related products.
出处
《中南药学》
CAS
2013年第9期700-702,共3页
Central South Pharmacy
作者简介
彭应枝,女,硕士研究生,主要从事中药分离分析研究,Tel:18711091248,E-mail:262741733@qq.com
通讯作者:刘韶,男,副教授,博士后,主要从事分离、分析科学新技术的开发与应用研究,Tel:13723873434,E-mail:liusha0999@hotmail.com