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:
Mar. 03, 2026
Filed:
Mar. 19, 2020
Mitsubishi Gas Chemical Company, Inc., Chiyoda-ku, JP;
Nur Syafiqah Mohamad Ishak, Niigata, JP;
Kazuto Ikemoto, Niigata, JP;
Mitsubishi Gas Chemical Company, Inc., Chiyoda-ku, JP;
Abstract
An object is to provide a high performance liquid chromatography method which enables quantitative analysis with the stability of reduced pyrroloquinoline quinone under measurement conditions maintained. The object can be achieved by the following method. A high performance liquid chromatography analysis method, comprising: a sample preparation step of preparing a sample for high performance liquid chromatography containing reduced pyrroloquinoline quinone or a salt thereof from a specimen and a separation step of separating the reduced pyrroloquinoline quinone or a salt thereof contained in the sample for high performance liquid chromatography from the specimen using interaction between a stationary phase and a mobile phase by a high performance liquid chromatography method using a reversed phase column as the stationary phase and using an eluent comprising 0.050 to 1.5% by mass of phosphoric acid and/or hydrochloric acid and 20 to 50% by volume of methanol and/or acetonitrile as the mobile phase.