Patent ID: 9696325
Date: 2017-07-04
CPC Classifications: G01N,H01J,Y10T

Claim:
1. A method for determining the amount of docosahexaenoic acid (DHA) in a human serum or plasma sample by mass spectrometry, the method comprising: (i) ionizing DHA from the sample to generate one or more DHA ions detectable by mass spectrometry; (ii) determining the amount of said one or more DHA ions by single mass spectrometry, wherein said one or more ions comprises an ion with a mass to charge ratio (m/z) of 327.2±0.5; and (iii) relating the amount of DHA ions to the amount of DHA in the sample, wherein said method has a limit of detection for DHA in the sample of about 5 μmol/L or less.