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[Determination of thymine, hypoxanthine and uracil contents in medical pipefish by HPLC].

OBJECTIVE
To establish a RP-HPLC method for simultaneous determination of thymine, hypoxanthine and uracil contents in medical pipefish.


METHOD
Samples were extracted with distilled water by ultrasonic wave and separated on Waters C18 column eluted with a mobile phase of 0.05 mol x L(-1) KFI2PO4-acetonitrile (97:3). The flow rate was 0.6 mL x min(-1). The determination wavelength was 260 nm and the column temperature was set at 40 degrees C.


RESULT
The method had good linearity in the range of 0.033-0.660 (r = 0.9996), 0.620-12.400 (r = 0.9999), 0.048-0.960 microg (r = 0.9995), with average recoveries of 98.67% (RSD 1.6%), 99.03% (RSD 0.74%), 98.65% (RSD 1.8%), for thymine, hypoxanthine and uracil respectively.


CONCLUSION
The simultaneous determination method of thymine, hypoxanthine and uracil in medical pipefish is established by RP-HPLC for the first time. The contents of the three constituents in different kinds of medical pipefish are significantly different. The method is simple, rapid and sensitive, and can be used for control the quality of medical pipefish.