Determination of the caffeine contents of various food items within the Austrian market and validation of a caffeine assessment tool (CAT)

Autor(en)
E. Rudolph, A. Färbinger, J. König
Abstrakt

The caffeine content of 124 products, including coffee, coffee-based beverages, energy drinks, tea, colas, yoghurt and chocolate, were determined using RP-HPLC with UV detection after solid-phase extraction. Highest concentrations of caffeine were found for coffee prepared from pads (755 mg l-1) and regular filtered coffee (659 mg l-1). The total caffeine content of coffee and chocolate-based beverages was between 15 mg l-1 in chocolate milk and 448 mg l-1 in canned ice coffee. For energy drinks the caffeine content varied in a range from 266 to 340 mg l-1. Caffeine concentrations in tea and ice teas were between 13 and 183 mg l-1. Coffee-flavoured yoghurts ranged from 33 to 48 mg kg-1. The caffeine concentration in chocolate and chocolate bars was between 17 mg kg-1 in whole milk chocolate and 551 mg kg-1 in a chocolate with coffee filling. A caffeine assessment tool was developed and validated by a 3-day dietary record (r2= 0.817, p < 0.01) using these analytical data and caffeine saliva concentrations (r2= 0.427, p < 0.01).

Organisation(en)
Department für Ernährungswissenschaften
Externe Organisation(en)
Universität Wien
Journal
Food Additives and Contaminants - Part A Chemistry, Analysis, Control, Exposure and Risk Assessment
Band
29
Seiten
1849-1860
Anzahl der Seiten
12
ISSN
1944-0049
DOI
https://doi.org/10.1080/19440049.2012.719642
Publikationsdatum
12-2012
Peer-reviewed
Ja
ÖFOS 2012
303009 Ernährungswissenschaften
Schlagwörter
ASJC Scopus Sachgebiete
Food Science, Chemistry(all), Toxicology, Public Health, Environmental and Occupational Health, Health, Toxicology and Mutagenesis
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/determination-of-the-caffeine-contents-of-various-food-items-within-the-austrian-market-and-validation-of-a-caffeine-assessment-tool-cat(a8ef8722-9fba-4be1-9e74-f40d66172e30).html