title: Quantitative determination of nicotinic acid in micro liter volume of urine sample by drop-to-drop solvent microextraction coupled to matrix assisted laser desorption/ionization mass spectrometry.
authors.affiliation: Department of Molecular Anatomy, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka 431-3192, Japan. shrikam@rediffmail.com
authors.forename: Kamlesh
authors.initials: K
authors.lastname: Shrivas
authors.forename: Devesh Kumar
authors.initials: DK
authors.lastname: Patel
mesh_terms: D002138:Calibration; D006801:Humans; D006863:Hydrogen-Ion Concentration; D057230:Limit of Detection; D008832:Microchemistry / Q000379:methods*; D009525:Niacin / Q000652:urine*; D012492:Salts; D012997:Solvents / Q000737:chemistry*; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / Q000379:methods*; D013997:Time Factors; D014050:Toluene
chemical_list: D012492:Salts; D012997:Solvents; D009525:Niacin; D014050:Toluene