Research on acid reduction process of Sea buckthorn puree by resin

Objective To investigate the effects of different anion exchange resins and flow rates on deacidification efficiency, nutrient retention, and sensory quality of sea buckthorn puree.

Methods The puree was separated into pulp and clear juice by centrifugation; the clear juice was deacidified by the optimal resin and then remixed with the pulp.

Results D318 resin was the most suitable, with a deacidification rate of 45%, and had minor effects on vitamin C and soluble solids. D202 and XAD7HP showed the weakest adsorption capacity for total acids. The processing capacity at 40 BV/h was reduced by half compared with 20 BV/h. The total acid content of the formulated puree was reduced by about half.

Conclusion D318 resin showed the best adsorption capacity for acids, with a deacidification rate of 45%. The optimal flow rate was 20 BV/h, and the formulated puree had harmonious taste.