ChromaQuest at the 84th International Scientific Conference of the University of Latvia section "Sustainable Chemistry and Materials for Environmentally Friendly Technologies"

On April 16, the work conducted within the ChromaQuest project was presented at the yearly 84th International Conference of the University of Latvia 2026 by project expert, BSc Taisija Gricenko.

The audience was introduced to the effect of XAD-7HP sorbent column purification on total

anthocyanin content, total polyphenol content and antiradical activity in berry press residues.

The topic of enzymatic acetylation and its optimization was also discussed. The selection of

biomass, enzyme, and sample concentration for the initial experiments was described and the first results using a honeysuckle berry press residue sample were presented. This press residue sample was selected because of its high cyanidin-3-O-glucoside content, which made it possible to compare the results obtained with the findings of colleagues described in the scientific literature.

The results obtained with UPLC-PDA-UV illustrated a decrease in anthocyanin peak intensity

for the acylated sample compared to the control sample. The bonds that appeared in the

acetylated sample were identified and described using Fourier Transform Infrared Spectroscopy (FTIR). The results showed that enzymatic acylation is possible not only using pure cyanidin-3-O- glucoside, but also in purified berry press residue samples that contain other biologically valuable compounds and anthocyanins. The experiments were conducted using berry press residues, that were kindly donated by our associated partner the company Very Berry.