Research Article
Extraction-Free, Direct Determination of Caffeine in Microliter Volumes of Beverages by Thermal Desorption-Gas Chromatography Mass Spectrometry
Figure 3
Typical chromatogram obtained for the latte style white coffee sample (a) and Pepsi Max® (b). Caffeine (i) with lidocaine, internal standard (ii).
(a) |
(b) |