Determination of full organic acid profiles in fruit juices and alcoholic beverages using novel chemically derivatized hyperbranched anion exchanger

Novel chemically derivatized anion exchanger with hyperbranched functional layer was prepared and successfully applied to the analysis of blueberry, mango, and grape juices as well as light beer and red wine by suppressed ion chromatography (IC). Unique selectivity of the prepared anion exchanger toward organic acids was provided by the structure of the functional layer prepared using both secondary and primary amines for hyperbranching and allowed the determination of full organic acid profiles together with inorganic anions in beverages in one run without using additional analytical methods or organic solvent additives in the mobile phase. The proposed method was validated with respect to linearity, recovery, limits of detection, and intra-day and inter-day precision.

Automated summary

A novel chemically derivatized anion exchanger with hyperbranched functional layer has been successfully prepared and applied to the analysis of organic acids in beverages using suppressed ion chromatography. The method allows for the determination of full organic acid profiles and inorganic anions in beverages in one run without the need for additional analytical methods or organic solvent additives in the mobile phase. Validation of the proposed method has shown good linearity, recovery, limits of detection, and intra-day and inter-day precision.