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Stanovení enantiomerů theaninu pomocí HPLC, porovnání metod detekce
[Determination of theanine enantiomers by HPLC; Comparison of detection methods]
T. Šlechtová, K. Kalíková, E. Tesařová
Language Czech Country Czech Republic
Document type Research Support, Non-U.S. Gov't
- MeSH
- Amino Acids * analysis MeSH
- Chemistry Techniques, Analytical MeSH
- Indicators and Reagents MeSH
- Complementary Therapies MeSH
- Analytic Sample Preparation Methods MeSH
- Dietary Supplements * analysis MeSH
- Dansyl Compounds MeSH
- Chromatography, High Pressure Liquid * methods utilization MeSH
- Publication type
- Research Support, Non-U.S. Gov't MeSH
Theanine, a non-proteinogenic amino acid present in tea leaves, is well known for its health promoting effects such as lowering blood pressure, reducing caffeine side effects, improving memory and supporting the immunity system. Theanine occurs in dietary supplements as racemate, while they should contain only the L-enantiomer. The article deals with the optimization of separation and detection of underivatized and derivatized theanine enantiomers on a chiral teicoplanin-based stationary phase. The chromatographic limits of detection and quantification were determined with the aim to assess the content of the theanine enantiomers in dietary supplements.
Determination of theanine enantiomers by HPLC; Comparison of detection methods
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