Determination of Vitamin K in Milk and Infant Formulas by Liquid Chromatography

Autor(en)

Harvey E. Indyk, David C. Woollard, Millie Barber, Carrie Berge, Sarah Booth, Malcolm Burn, Adriano Cecco, Scott Christiansen, Kathy Cook, Ursula Coors, Francesca Dapra, Kenneth Davidson, Marion P. De Roode, Natalie Dumais, Michael Edwards, Chris Ellis, Ibrahim Elmadfa, Giuliana Fedrigo, Bertram Fong, Pamela Gilliland, Susan Hannaford, Peter Hofmann, Peter Horstmann, Marija Jagodic, Maurice Kerr, Kaname Kodaka, Terhi Koivu-Tikkanen, Erik Konings, Jim Kyval, Bernard Lacheron, Paul Lawrence, Emile Ledoyen, Pamela Manzi, Hisashi Matsuda, Adriana McCamley, Donald Myers, Janet Nelson, Rachel Noble, Lisa Oehrl, Gianfranco Panfili, Richard Pelletier, Vieno Piironen, Laura Pizzoferrato, Sal Regala, Koichi Saito, Karen Schimpf, Willy Schuep, Leon Schurgers, Henry Simons, Enrico Tagliaferri, Henk Thijssen, Christian Tremblay, Marie Jose Trisconi, Cees Vermeer, Wijnand Verschoor, Pat Vyas, Karl Heinz Wagner, Gerald Woollard

Abstrakt

A simple procedure for determination of vitamin Ki was developed for routine compliance monitoring of supplemented infant formula and measurement of endogenous levels in milk and milk powders. Samples are digested with lipase and extracted into hexane; an aliquot is evaporated, reconstituted in methanol, and analyzed by reversed-phase LC. Post-column zinc reduction of phylloquinone facilitates detection by fluorescence. The procedure was subjected to an AOAC collaborative study involving 8 materials, each in blind duplicate, across the range of 5-120 μg/100 g solids and including NIST 1846 reference material. Thirty-three laboratories returned valid data which were then statistically analyzed for outliers and precision parameters. Mean RSD_R (%) was 6.53 (4.33-10.94), with a mean HORRAT value of 0.33 (0.23-0.43) and RSD_r:RSD_R ratio of 0.74. K₁ isomers (cis and trans) were aggregated with conventional C₁₈ columns, but may be selectively estimated with use of the C₃₀ column.

Organisation(en)

Dekanat der Fakultät für Lebenswissenschaften, Institut für Sport- und Bewegungswissenschaft, Department für Ernährungswissenschaften

Externe Organisation(en)

Anchor Products, AgriQuality NZ Ltd., Lynfield Food Laboratory, École polytechnique fédérale de Lausanne, Wyeth, LLC, Universitätsklinikum Maastricht, Auckland Hospital

Journal

Journal of AOAC International

Band

83

Seiten

121-130

Anzahl der Seiten

10

ISSN

1060-3271

DOI

https://doi.org/10.1093/jaoac/83.1.121

Publikationsdatum

2000

Peer-reviewed

Ja

ÖFOS 2012

303009 Ernährungswissenschaften

ASJC Scopus Sachgebiete

Analytical Chemistry, Food Science, Environmental Chemistry, Agronomy and Crop Science, Pharmacology

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/determination-of-vitamin-k-in-milk-and-infant-formulas-by-liquid-chromatography(a038c38e-4782-493a-9cb7-daec820c4ea3).html