PMID: 11312804Apr 21, 2001Paper

Determination of phylloquinone and menaquinones in animal products with fluorescence detection after postcolumn reduction with metallic zinc

Journal of Agricultural and Food Chemistry
T J Koivu-TikkanenV I Piironen

Abstract

A high-performance liquid chromatographic (HPLC) method for the determination of phylloquinone and menaquinones in foods of animal origin is described. The K vitamers were quantified with a fluorescence detector after postcolumn reduction with metallic zinc using K1(25) as an internal standard. Extraction was done either with 2-propanol-hexane (meat and fish products) or with acid hydrolysis method (dairy products). Prior to quantification, sample extracts were purified by semipreparative HPLC; in addition, the fats of cheese and rainbow trout samples were removed with lipase hydrolysis. By this method the phylloquinone and menaquinones (MK-4 to MK-10) present in a few representative samples of different animal food groups were determined. HPLC-MS was used to confirm the identification of K vitamers. Long-chain menaquinones were found from bovine and pig livers as well as from various cheeses. The total vitamin K contents calculated as the sum of quantified K vitamers were in general low (mean content 10-100 ng/g); the highest amount was analyzed in chicken meat (600 ng/g).

Citations

Aug 7, 2012·European Journal of Clinical Pharmacology·Milka MarinovaJohannes Oldenburg
Sep 29, 2012·Journal of Agricultural and Food Chemistry·Alessandra GentiliRoberta Curini
Jan 13, 2006·European Journal of Clinical Nutrition·R KorpelaM J Tikkanen
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Jun 24, 2014·Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences·J Philip KarlSarah L Booth
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Oct 2, 2007·Nutrition in Clinical Practice : Official Publication of the American Society for Parenteral and Enteral Nutrition·Debra A Pearson
Apr 8, 2020·Frontiers in Bioengineering and Biotechnology·Cathrine Arnason Bøe, Helge Holo
Feb 23, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Yueqing XuPeiwu Li
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May 22, 2017·EFSA Journal·UNKNOWN EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA)Monika Neuhäuser-Berthold
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Sep 3, 2021·Nutrition Reviews·Přemysl MladěnkaUNKNOWN OEMONOM researchers and collaborators
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