Quantitation of Radio-Labelled Vitamin K₁ and Vitamin K₁ Epoxide in Plasma by High Pressure Liquid Chromatography

Summary

A convenient, accurate and reproducible high pressure liquid chromatographic method for the quantitation of radio-labelled vitamin K₁ and vitamin K₁ epoxide in plasma is described. The method involves the determination of total ether extractable radioactivity, and a chromatographic separation to determine the relative quantities of radio-labelled vitamin K₁ and vitamin K₁ epoxide. The method is useful over a wide range of ratios of the two compounds, and has a coefficient of variation of approximately 5%.

• References

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