Patent ID: 7494815
Filing Date: 2009-02-24
Classification: G01N,Y10T

Abstract:
1. A method for analyzing a compound with amino group comprising: (a) reacting a compound with amino group contained in a sample comprising the same with a derivatization reagent to generate a derivatized compound, wherein said derivatized compound is a compound of formula (I) or formula (II): wherein Ar R R wherein Ar wherein Ar X denotes an oxygen atom or a sulfur atom, Y denotes an oxygen atom, a sulfur atom, a secondary amine, a tertiary amine, or an optionally substituted methylene group, R R wherein R (b) eluting said derivatized compound by liquid chromatography via stepwise elution on a concentration gradient; and (c) detecting said derivatized compound eluted from said liquid chromatography by mass spectrometry.