Journal
FOOD CHEMISTRY
Volume 278, Issue -, Pages 261-266Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2018.11.072
Keywords
Methylxanthines; Mass spectrometry; Paper spray; Multiple reaction monitoring
Funding
- University of Calabria
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A fast method for the determination of methylxanthines in cocoa products and drugs based on PS-MS/MS under MRM condition has been developed. Analyte ions were generated by applying a high voltage on a paper substrate drenched of sample extract using a small volume (similar to 15 mu L) of spray solvent. The gas phase chemistry of the molecules under investigation has been elucidated. The accuracy values of the methodology ranged from 95 to 110%, while the analytical parameters LOQ, LOD, recovery and reproducibility, calculated analyzing spiked samples, confirmed the consistency of the proposed method. Furthermore, real samples have been analyzed both by the developed methodology and by using a classical HPLC-UV approach obtaining comparable values.
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