Red Bull Energy Drink Analysis – AppNote – MicroSolv Technology Corporation

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ARTICLES, APPNOTES, FAQ (9292)
- AppNotes Library (1888)
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June 28, 2013
Bill Ciccone

AppNotes ANP/HILIC Methods / AppNotes Cogent Diamond Hydride / AppNotes Food and Beverages / AppNotes Library / ARTICLES, APPNOTES, FAQ

Separation of Taurine and Caffeine with LC-MS

A method combining Solid Phase extraction with high performance liquid chromatography–electrospray ionization tandem Mass Spectrometry was developed for the highly sensitive and accurate screening of Caffeine and Taurine in energy drinks.

The matrix pretreatment by SPE sample extraction was essential in the analysis of Taurine. The matrix did not interfere with the analysis of Caffeine (data not shown). This Method has been successfully applied to screening of Caffeine and Taurine in commercial Red Bull samples, and it is valuable to ensure the safety of food and beverages.

Peaks:
1. Caffeine 195.0877 m/z [M+H]+
2. Taurine 126.0219 m/z [M+H]+

Method Conditions
Column: Cogent Diamond Hydride™, 4µm, 100Å
Catalog No.: 70000-15P-2
Dimensions: 2.1 x 150mm
Mobile Phase:
—A: DI Water / 0.1% Formic Acid (v/v)
—B: Acetonitrile / 0.1% Formic Acid (v/v)
Gradient:

Time (minutes)	%B
0	95
1	95
6	30
7	30
8	95

Temperature: 25˚C
Post Time: 3 minutes
Injection vol.: 1µL
Flow rate: 0.4mL / minute
Detection: ESI – POS – Agilent 6210 MSD TOF Mass Spectrometer
Sample Preparation: Red Bull® was degassed using vacuum and then SPE cartridge UCT Clean Screen® XCEL II (for polar compounds) was used to extract ingredients. After a portion of the Red Bull® drink was passed through the SPE cartridge, ingredients were eluted with Methanol. A portion was filtered through a 0.45µm Nylon Syringe Filter (MicroSolv Tech Corp.).
t0: 0.9 minutes

Note: Taurine, a common ingredient in energy drinks, is an amino acid. It is an essential nutrient because of its postulated role(s) as an inhibitory neurotransmitter or neuromodulator. It also affects nervous tissue. Taurine is the only major amino acid to decrease in concentration during brain development. In Taurine-deficient cats or monkeys, abnormal brain development was observed. Also retinal abnormalities were observed. For that reason, Taurine is added to all breast milk substitutes. In recent studies it was reported that Taurine has been known to protect against ischemia and heart failure.

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