El-Yazigi A, Said S A
J Pharm Sci. 1980 Dec;69(12):1434-6. doi: 10.1002/jps.2600691222.
A rapid, sensitive, and specific high-performance liquid chromatographic method was developed for the determination of khellin in serum and urine using theophylline as the internal standard. Chromatography was performed on a reversed-phase C18 column with 65% (v/v) methanol as the mobile phase. The assay is capable of measuring khellin concentrations down to 100 ng/ml with a total procedure time of less than 20 min. Oral administration of 60 mg of khellin tablets to two healthy human males was carried out, and the serum samples were analyzed by the described method. Serum concentration-time profiles are presented.
