Determination of caffeine and glucose in selected energy drinks
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F18%3A39912549" target="_blank" >RIV/00216275:25310/18:39912549 - isvavai.cz</a>
Výsledek na webu
<a href="https://dk.upce.cz/bitstream/handle/10195/71970/03%20-%20Pravcov%c3%a1%20et%20al.pdf?sequence=1&isAllowed=y" target="_blank" >https://dk.upce.cz/bitstream/handle/10195/71970/03%20-%20Pravcov%c3%a1%20et%20al.pdf?sequence=1&isAllowed=y</a>
DOI - Digital Object Identifier
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Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Determination of caffeine and glucose in selected energy drinks
Popis výsledku v původním jazyce
The aim of this study was to monitor the caffeine and glucose content in several energy drinks. The caffeine was determined by (direct) differential pulse voltammetry at a glassy carbon paste electrode in 0.5 mol L-1 sulfuric acid at a potential step of 5 mV, potential amplitude of 40 mV, and the scan rate of 50 mV s-1. The content of glucose was determined using amperometric glucose biosensor in 0.1 mol L-1 phosphate (pH 7.0) buffer solution at a constant voltage of +0.4 V and stirring speed of 400 min-1. The selected samples were analysed and the results obtained compared to those declared by manufactures. Except to three samples, namely "Monster", "Red Bull" (without sugar) and "Spark", the individual results were in good agreement with the declared amounts. Moreover, based on the analyses performed, it can be stated that the energy drinks "Big Shock!" and "Red Bull" are the best source of energy when considering the found total sugar via the glucose content.
Název v anglickém jazyce
Determination of caffeine and glucose in selected energy drinks
Popis výsledku anglicky
The aim of this study was to monitor the caffeine and glucose content in several energy drinks. The caffeine was determined by (direct) differential pulse voltammetry at a glassy carbon paste electrode in 0.5 mol L-1 sulfuric acid at a potential step of 5 mV, potential amplitude of 40 mV, and the scan rate of 50 mV s-1. The content of glucose was determined using amperometric glucose biosensor in 0.1 mol L-1 phosphate (pH 7.0) buffer solution at a constant voltage of +0.4 V and stirring speed of 400 min-1. The selected samples were analysed and the results obtained compared to those declared by manufactures. Except to three samples, namely "Monster", "Red Bull" (without sugar) and "Spark", the individual results were in good agreement with the declared amounts. Moreover, based on the analyses performed, it can be stated that the energy drinks "Big Shock!" and "Red Bull" are the best source of energy when considering the found total sugar via the glucose content.
Klasifikace
Druh
J<sub>ost</sub> - Ostatní články v recenzovaných periodicích
CEP obor
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OECD FORD obor
10406 - Analytical chemistry
Návaznosti výsledku
Projekt
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Návaznosti
S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2018
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Scientific Papers of the University of Pardubice, Series A, Faculty of Chemical Technology
ISSN
1211-5541
e-ISSN
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Svazek periodika
24
Číslo periodika v rámci svazku
November
Stát vydavatele periodika
CZ - Česká republika
Počet stran výsledku
8
Strana od-do
31-38
Kód UT WoS článku
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EID výsledku v databázi Scopus
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