Abstract
A simple and highly sensitive method for the determination of caffeine in energy beverages was developed and validated. Sample preparation utilizing solid-phase extraction (SPE) was simple and reliable. Separation by isocratic ultra-high performance liquid chromatography (UPLC) with a reversed-phase C18 column was performed within 6 min. The use of SPE with UPLC coupled with electrospray ionization-multiple tandem mass spectrometry detection (ESI-MSn) was accurate, reproducible, and validated for the determination of caffeine in energy drink matrices. The limit of quantification for caffeine was approximately 2.1 ng mL-1. The intra-day and inter-day precisions were less than 4%, and the accuracy of the measurements was between 85.1% and 93.2%. Results for caffeine concentrations in eighteen beverages were compared to the values on the labels. This paper describes the first use of the UPLC-ESI-ion trap MSn technique for quality-control purposes of caffeine present in energy drinks.
| Original language | English |
|---|---|
| Pages (from-to) | 1852-1861 |
| Number of pages | 10 |
| Journal | Analytical Letters |
| Volume | 47 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2014 Jul |
| Externally published | Yes |
Bibliographical note
Funding Information:This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Ministry of Education, Science, and Technology (MEST) (20122039424), and the grant (PJ0094834) funded by the Next-Generation BioGreen21 program, Rural Development Administration.
Keywords
- Caffeine
- Energy drinks
- HPLC-ESI-MS/MS
- Solid-phase extraction
ASJC Scopus subject areas
- Analytical Chemistry
- Biochemistry
- Spectroscopy
- Clinical Biochemistry
- Biochemistry, medical
- Electrochemistry