Evaluation of the structural composition change of the co-pigmentation product of L-ascorbic acid and D-glucose under oxidative stress

Currently, one of the priority directions of innovative development is obtaining products with new consumer properties, in this regard, the development of food coloring compositions with optimized parameters on the basis of biologically active natural compounds seems promising. The present paper has studied structural and group composition of product of joint caramelization (co-pigmentation) of L-ascorbic acid and D-glucose and its change under oxidative stress conditions. Oxidative stability and functional composition of synthesized caramel product have been investigated by methods of elemental analysis and oscillating spectroscopy. The experiment showed no significant oxidative transformation and photo-chemical destruction of the structure. The reason for it probably the stabilization of primary structure, as well as the possibility of tautomeric transition between oxo-lactone chromophore and α-pyrone form, stabilized by the intermolecular bonding. The experiment additionally established absence of potently dangerous low- and high-molecular furan derivatives in the composition of isolated products. The authors expect to develop the research in the direction of experimental estimation of the synthesized product bioactivity.