Patent ID: 7754419
Filing Date: 2010-07-13
Classification: G01N,Y10T

Abstract:
1. A method for determining the presence or amount of testosterone present in a test sample of blood, serum, plasma, or urine when taken from a human comprising, (a) purifying testosterone from the test sample by: (b) ionizing the purified testosterone to produce one or more testosterone ions detectable by a mass spectrometer, wherein one of said one or more testosterone ions comprises a precursor ion having a mass to charge ratio of about 289.1±0.5; and (c) detecting the presence or amount of the testosterone ion(s) by a mass spectrometer, wherein the presence or amount of the testosterone ion(s) is related to the presence or amount of testosterone in the test sample, wherein the method is capable of detecting testosterone concentrations of less than 10 ng/dL in the test sample.