Vitamin K (phylloquinone or vitamin K1 and menaquinones or vitamin K2) plays an
important role as a cofactor in the synthesis of hepatic blood coagulation proteins, but …

Plasma vitamin K1 (phylloquinone) determination is commonly used for the diagnosis of
vitamin K deficiency in patients suffering from lipid malabsorption. Moreover, current …

We describe a procedure for quantification of vitamin K1 in human plasma by HPLC.
Samples, enriched with a vitamin K derivative as internal standard, were deproteinized …

A HPLC fluorescence determination method for Vitamin K derivatives (Vitamin K1,
phylloquinone, PK and K2, menaquinones, MK-4 and MK-7) using post-column reduction …

We report here the development of a precise and sensitive method for the determination of
vitamin K homologues including phylloquinone (PK), menaquinone-4 (MK-4), and …

Vitamin K is an essential nutrient in the body and involved in numerous physiological and
pathophysiological functions. Both the lack and surplus of vitamin K can put human health at …

Background: The plasma concentration of vitamin K1 (phylloquinone) is the most reliable
index for assessing vitamin K status. Our aim was to analytically validate an HPLC method …

OBJECTIVES: We report a sensitive and selective method for the simultaneous
determination of vitamin K1 and K2 analogs (VKs) with high-performance liquid …

A sensitive and highly selective high-performance liquid chromatography (HPLC) method
was developed for the determination of vitamin K homologues including phylloquinone (PK) …

A modified high-performance liquid chromatography (HPLC) method, based on Davidson
and Sadowski [Meth. Enzymol. 282 (1997) 408], with fluorescence detection after zinc …