Determination of Caffeine Content in Commercial Energy Beverages Available in Saudi Arabian Market by Gas Chromatography-Mass Spectrometric Analysis

Figure 2

Representative chromatogram showing caffeine and carbamazepine (IS) peaks in the energy drink sample analyzed by the proposed GC-MS method: (a) total chromatogram and (b) selected ion chromatogram (concentration ≈ 10 μg/mL).

(a)

(b)