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

Table 3

Recovery analysis results of caffeine in commercial energy beverage samples.

Concentration of recovery samples (µg/mL)	Percent of target concentration (µg/mL) (%)^∗	Average amount of caffeine recovered (µg/mL)^∗∗	Average percent recovery ± % RSD^∗∗
5	50	5.09	101.8 ± 0.20
10	100	9.92	99.2 ± 1.23
15	150	15.16	101.1 ± 0.66

^∗Target concentration is 10 (µg/mL). ^∗∗Average of three determinations.