Abstract
OBJECTIVES:This study was aimed to determine in vitro human whole blood-to-plasma ratio (KWB/P) of THJ-018 by gas chromatography/mass spectrometry (GC/MS).MATERIALS AND METHODS:The samples (human blood) were sprayed with THJ-018 and an internal standard and extracted using solid-phase extraction. THJ-018 was determined in the final extracts by GC/MS.RESULTS:The value for KWB/P was 1.56 (1.38–1.81), and red blood cell partitioning was 1.01 (1.01–1.02). The distribution of THJ-018 between whole blood and plasma was observed to be affected by temperature.CONCLUSION:The data analysis supports the proposition that the ratio of the plasma to whole blood concentrations (1.56) is a suitable parameter characterizing THJ-018 distribution in whole blood. For toxicological analysis, it would be best to refrain from converting any drug concentration measured in whole blood to that anticipated in plasma or serum; however, toxic and therapeutic concentrations should be determined for the individual specimens collected.
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