4. Conclusions
A method for the determination of amino acid and biogenic
amines in gluconic acid fermentation was successfully adapted,
obtaining adequate values and demonstrating good linearity and
precision, as well as low detection and quantification limits. Its
utility for the routine analysis of amino acids and biogenic amines
in this type of products has been shown.
The fermented products did not contain biogenic amines. The
amino acid profile, specifically the concentrations of glutamine,
alanine, arginine, proline, glutamic acid, asparagine–serine, isoleucine,
leucine and phenylalanine allows the discrimination of the
beverages according to the AAB strain responsible for the fermentation.
Fermentation withG. japonicus resulted in major amino acid
concentration changes.