A Simple, Fast, and Reliable LC-MS/MS Method for the Measurement of Homovanillic Acid and Vanillylmandelic Acid in Urine Specimens
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Abstract
Homovanillic acid (HVA) and vanillylmandelic acid (VMA) are catecholamine metabolites used in the diagnostic workup of neuroendocrine tumors. Here we describe a simple dilute-and-shoot method for simultaneously quantitating HVA and VMA in human urine specimens. The method employs analyte separation on a reverse-phase liquid chromatography column followed by detection using electrospray ionization triple quadrupole mass spectrometry (ESI-MS/MS), wherein qualifier and quantifier ion transitions are monitored. This is a simple and fast analytical method with an injection-to-injection time of 4 min.
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