Theophylline analysis by reversed-phase high-pressure liquid chromatography: Elimination of interferences
β Scribed by Joy R. Miksic; Benjamin Hodes
- Publisher
- John Wiley and Sons
- Year
- 1979
- Tongue
- English
- Weight
- 359 KB
- Volume
- 68
- Category
- Article
- ISSN
- 0022-3549
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More than 90 dierent capsicums are found all over the world. They contain capsaicinoids, which are responsible for the hot and pungent Β―avour. After extraction by a methanolΒ±water mixture (60 : 40, v/v) from capsicum oleoresins, 13 compounds were separated by analytical HPLC on a C18 Hypersil column
Compounds IVb-IVg were prepared similarly from I11 and the appropriate alcohols (Table I). p-Chlorophenyl Benzo[ b]-3-methyl-2-furancarbamate (1Vb)-A solution of I11 (2.01 g, 0.01 mole) and p-chlorophenol(l.28 g, 0.01 mole) in 30 ml of dry benzene was refluxed for 4 hr. The solvent was evaporated,