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:
Dec. 24, 2002
Filed:
Feb. 10, 2000
Applicant:
Inventors:
Yumi Yokoyama, Ibaraki-ken, JP;
Naoya Kishi, Tsukuba, JP;
Masayuki Tanaka, Tsukuba, JP;
Naoki Asakawa, Tsukuba, JP;
Assignee:
Eisai Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 3/002 ; G01N 3/006 ;
U.S. Cl.
CPC ...
G01N 3/002 ; G01N 3/006 ;
Abstract
A high-performance liquid chromatography apparatus and a process for conversion of mobile phase, enabling a trace amount of sample for NMR analysis to be efficiently separated and prepared, includes steps of separating a target ingredient from the sample by the high-performance liquid chromatography, trapping the target ingredient in a trapping column using a different mobile phase, replacing water by deuterium oxide and eluting this target ingredient from the trapping column using deuterated solvent other than deuterium oxide.