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

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Analyte</td><td class="align_center">Storage conditions</td><td class="align_center">Mean recovery ± % RSD<sup>∗</sup></td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left" rowspan="3">Caffeine</td><td class="align_center">25 ± 2°C; 48 h</td><td class="align_center">99.04 ± 0.0.58</td></tr><tr><td class="align_center">4–8°C; 7 days</td><td class="align_center">98.86 ± 0.47</td></tr><tr><td class="align_center">−20°C; 30 days</td><td class="align_center">99.26 ± 0.0.61</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr><tr class="table-fn"><td><div><sup>∗</sup><i>n</i> = 3. The caffeine working solution having a concentration of 10 <i>µ</i>g/mL was used for solution stability experiment.<br/></div></td></tr></table>

<div>Results of solution stability for caffeine.</div>

Journal of Spectroscopy

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Table 2

Table 2: Determination of Caffeine Content in Commercial Energy Beverages Available in Saudi Arabian Market by Gas Chromatography-Mass Spectrometric Analysis 

Table 2 | Determination of Caffeine Content in Commercial Energy Beverages Available in Saudi Arabian Market by Gas Chromatography-Mass Spectrometric Analysis 