Abstract
Excessive organic acids in grape juice will not only result in poor taste but will also cause turbidity and sedimentation. Tartaric acid exerts the most significant acidity among all organic acids in grape juice. In this study, we used tartaric acid as the main target and anion‐exchange resin to remove tartaric acid from concentrated grape juice. Factors influencing the removal process were optimized by liquid chromatography with ultraviolet detection and statistical analysis for optimal deacidification of concentrated grape juice. Use of the anion‐exchange resin 335 treat the concentrated grape juice at a ratio of 1:6 (2:11.98) at 15.57°C for 4.35 hr. The tartaric acid removal rate reached 69.01%; the anion‐exchange resin 335 demonstrated the best removal effect.
Highlights
Grapes are one of the largest and common fruit crops with high antioxidant capacity worldwide
Concentrated grape juice: Natural grape juice obtained from squeezing of Syrah or Shiraz, Cabernet Sauvignon and Malbec grapes was placed in the evaporation equipment, which is a flat, spiral, or tubular heat exchanger
This study examined the influence of deacidification on concentrated grape juice by sensory analysis of the final concentrated grape juice
Summary
Grapes are one of the largest and common fruit crops with high antioxidant capacity worldwide. Reducing the tartaric acid content without affecting the quality of concentrated grape juice is important. Chemical acid‐reducing method mainly utilizes partial alkali salt to react with organic acid in the juice and reduce the acid content. This method is rapid and effective and regardless of the chemical reagents used, it poses certain limitations and security risks, which are inconsistent with the consumer's pursuit of natural additive‐free consumer psychology (Vera et al, 2003). This study used tartaric acid as the main target and anion‐exchange resin to deacidify the concentrated grape juice with high acidity.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
