Chromatographic analysis of orange and apple juices is provided using novel covalently-bonded poly(styrene-divinylbenzene)-based (PS-DVB) hyperbranched anion exchanger for suppressed ion chromatography (IC) with improved selectivity toward inorganic anions and organic acids. The obtained stationary phase provides baseline resolution of weakly retained organic acids such as glycolate, acetate, lactate, and formate, which are not separated to baseline with modern commercially available anion exchangers. The proposed method is validated with respect to linearity, recovery, limits of detection, and intra-day and inter-day precision.

中文翻译：

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使用新型共价键合超支化阴离子交换剂对苹果和橙汁中的无机阴离子和有机酸进行定量，提高了选择性

橙汁和苹果汁的色谱分析是使用新型共价键合的聚（苯乙烯-二乙烯基苯）基（PS-DVB）超支化阴离子交换剂进行的，用于抑制离子色谱（IC），并提高了对无机阴离子和有机酸的选择性。所获得的固定相为弱保留的有机酸（例如乙醇酸，乙酸盐，乳酸盐和甲酸）提供了基线分离度，而在现代市售阴离子交换剂中，这些有机酸并未分离到基线。该方法在线性，回收率，检测限以及日内和日间精度方面均得到了验证。