Project Number: 1235-52000-058-00
Start Date: Jul 12, 2006
End Date: Feb 21, 2009
For the water-soluble vitamins, use liquid chromatography-mass spectrometry for optimized individual methods, multiple vitamin methods, and stable isotope dilution methods. For vitamin D, use liquid chromatography-mass spectrometry for an optimized individual method and a stable isotope dilution method.