Determination of caffeine in serum and urine.


The method of Axelrod and Reichenthal for the determination of caffeine in serum and urine was modified. The benzene used in the extraction of caffeine was shown to alter the spectral absorbancecurve of this compound. A method based on the differential absorbancespectrums of caffeine and related compoundsis described. Both methods exhibited satisfactory… (More)

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