The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 15, 2008
Filed:
Nov. 26, 2004
Laurent Denu, Fillage-Neuf, FR;
Richard Goessl, Grenzach-Wyhlen, DE;
Peter Hofmann, Weil-Haltingen, DE;
Laurent Denu, Fillage-Neuf, FR;
Richard Goessl, Grenzach-Wyhlen, DE;
Peter Hofmann, Weil-Haltingen, DE;
DSM IP Assets B.V., TE Heerlen, NL;
Abstract
A method for quantitative determination of 25-hydroxycholecalciferol in feed is described. The method includes the steps of adding a defined amount of an internal standard which has a mass different from 25-hydroxycholecalciferol and a polarity similar to that compound, e.g., 26,27-hexadeutero-25-hydroxycholecalciferol, to an aqueous dispersion of the feed, extracting the aqueous dispersion with tert.butyl methyl ether and further processing the extract by HPLC and mass spectrometry as described in the specification.
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