公开(公告)号：US11879898B2

公开(公告)日：2024-01-23

申请号：US17417572

申请日：2019-12-23

Applicant: DH Technologies Development Pte. Ltd.

Inventor： Subhakar N Dey ,  Michal Weinstock

IPC: G01N33/00 ,  G01N33/74 ,  G01N1/34 ,  G01N1/40 ,  G01N30/04 ,  G01N30/72 ,  G01N30/02 ,  G01N30/06

CPC classification number: G01N33/743 ,  G01N1/34 ,  G01N1/4077 ,  G01N30/04 ,  G01N30/72 ,  G01N2001/4083 ,  G01N2001/4088 ,  G01N2030/027 ,  G01N2030/045 ,  G01N2030/067 ,  G01N2560/00

Abstract: The teachings herein provide for a method of analyzing testosterone using mass spectrometry. The method entails combining in a vial or well, a tagging reagent that is reactive with testosterone, an aqueous precipitation agent that precipitate proteins from solution, and an internal standard solution, the internal standard solution containing a known concentration of an isotopically enriched testosterone and then adding to the vial or well, a sample containing or suspected to contain testosterone. The vial can then be mixed to cause simultaneous precipitation of proteins and reaction of any testosterone present with the tagging reagent to form a mixture of a precipitate and a liquid solution. The liquid solution can then be separated from any precipitate and then analyzed for testosterone using liquid chromatography tandem mass spectrometry.

公开(公告)号：US20220057412A1

公开(公告)日：2022-02-24

申请号：US17417572

申请日：2019-12-23

Applicant: DH Technologies Development Pte. Ltd.

Inventor： Subhakar N Dey ,  Michal Weinstock

IPC: G01N33/74 ,  G01N30/04 ,  G01N30/72 ,  G01N1/34 ,  G01N1/40

Abstract: The teachings herein provide for a method of analyzing testosterone using mass spectrometry. The method entails combining in a vial or well, a tagging reagent that is reactive with testosterone, an aqueous precipitation agent that precipitate proteins from solution, and an internal standard solution, the internal standard solution containing a known concentration of an isotopically enriched testosterone and then adding to the vial or well, a sample containing or suspected to contain testosterone. The vial can then be mixed to cause simultaneous precipitation of proteins and reaction of any testosterone present with the tagging reagent to form a mixture of a precipitate and a liquid solution. The liquid solution can then be separated from any precipitate and then analyzed for testosterone using liquid chromatography tandem mass spectrometry.