Concern with the physiological effects of caffeine has stimulated research on its analysis in food and biological systems. High-performance liquid chromatographic (hplc) analysis of caffeine in food products requires only the filtration of aqueous extracts and injection onto a suitable column. Detection is frequently based on the measurement of /ív absorption at 280 nm (7). Determination of caffeine at the low concentrations present in body fluids is accomplished by direct injection onto reversed-phase hplc columns (8). Gas chromatographic determination of caffeine in beverages using a flame ionization detector has also been described (9). Capillary electrophoresis has also been used for caffeine determination (10).

Sleeping Sanctuary

Sleeping Sanctuary

Salvation For The Sleep Deprived The Ultimate Guide To Sleeping, Napping, Resting And  Restoring Your Energy. Of the many things that we do just instinctively and do not give much  of a thought to, sleep is probably the most prominent one. Most of us sleep only because we have to. We sleep because we cannot stay awake all 24 hours in the day.

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