Sensitive liquid chromatographic assay for the simultaneous determination of 5-fluorouracil and its prodrug, tegafur, in beagle dog plasma.
2003
Abstract A high-performance liquid chromatographic (HPLC) method has been developed for the simultaneous determination of 5-fluorouracil (5-FU) and its prodrug, tegafur (TF), in dog plasma. 5-FU, the internal standard, 5-bromouracil, and TF were separated on a C 18 Spherisorb ODS 2 column using isocratic elution with retention times of 4.4, 8.0 and 21.2 min, respectively. Detection by UV absorption at 260 nm gave a limit of quantitation of 4 μg/l for 5-FU in plasma. Calibration curves for 5-FU and TF were linear over the ranges of 4–160 μg/l and 0.48–19.2 mg/l, respectively. Intra- and inter-day precision over these concentration ranges were
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