Rapid determination of caffeine in one drop of beverages and foods using drop-to-drop solvent microextraction with gas chromatography/mass spectrometry /
Kamlesh Shrivas and Hui-Fen Wu
YI2008 M04 D01
CAFFEINE--IF
IF 10 (13)
Journal of Chromatography A 1170 (1-2) 2007 : 9-14 0021-9673