Mexican 'Ataulfo' mango (Mangifera indica L) as a source of hydrolyzable tannins. analysis by MALDI-TOF/TOF MS.
Sáyago-Ayerdi S. G., Moreno-Hernández C. L., Montalvo-González E., García-Magaña M. L., Oca I. M. M. de, Torres J. L., Pérez-Jiménez J.
Author Affiliation: Instituto Tecnológico de Tepic, Laboratorio Integral de Investigación en Alimentos, Av. Tecnológico No 2595, Lagos del Country, 63178, Tepic, Nayarit, Mexico.
Food Research International 51 : 188-194
Abstract : Hydrolyzable tannins (HT) are secondary metabolites belonging to the family of polyphenols and for which different health effects have been described. Mango (Mangifera indica L) has been described as a source of HT by LC-MS analysis. In the present work we characterized HT profile in the peels of the Mexican 'Ataulfo' mango, a by-product of an industrial process, by MALDI-TOF MS. Two cationizing agents were employed, Na and Cs, allowing the detection of large molecules of gallotannins from penta to trideca-O-galloylglucose. This is a faster analysis than LC-MS, and without the use of solvents. The structures suggested for HT were confirmed by MALDI-TOF/TOF MS analysis, in those peaks with enough intensity. This work shows that peels of 'Ataulfo' mango are a rich source of HT, as well as the validity of MALDI-TOF/TOF MS for the analysis of this kind of compounds.