Kazimierczak Renata, Kopczyńska Klaudia, Ponder Alicja, Hallmann Ewelina, Żebrowska-Krasuska Małgorzata, Średnicka-Tober Dominika
Department of Functional and Organic Food, Institute of Human Nutrition Sciences, Warsaw University of Life Sciences, Nowoursynowska 159c, 02-776 Warsaw, Poland.
Bioeconomy Research Institute, Agriculture Academy, Vytautas Magnus University, Donelaicio 58, 44248 Kaunas, Lithuania.
Foods. 2025 Apr 16;14(8):1369. doi: 10.3390/foods14081369.
The aim of this study is to characterize a range of the Japanese quince () fruit preserves in terms of the content of vitamin C and phenolic compounds, as well as to discuss the effects of processing on the concentrations of these compounds in Japanese quince fruit. Research materials consisted of seven different products: a 100% Japanese quince fruit pressed juice, syrups with added honey, cane sugar, and xylitol, and three products sweetened with white sugar: jam, fruits in syrup, and candied fruits. The content of vitamin C and polyphenolic compounds (phenolic acids and flavonoids) was determined by high-performance liquid chromatographic method. The study confirmed that the Japanese quince fruit preserves can be considered a rich source of vitamin C and selected phenolics. At the same time, the tested products differed significantly in terms of the levels of the analyzed phenolic compounds, e.g., the syrups sweetened with xylitol were characterized by significantly higher concentrations of the analyzed phenolics than the syrups sweetened with other sweeteners. It is noteworthy to explore the possibilities for quince fruit processing, taking into account various processing methods and conditions, and using sweeteners alternative to white sugar.
本研究旨在根据维生素C和酚类化合物的含量对一系列日本榅桲（）果酱进行表征，并讨论加工对日本榅桲果实中这些化合物浓度的影响。研究材料包括七种不同的产品：100%日本榅桲果实压榨汁、添加了蜂蜜、蔗糖和木糖醇的糖浆，以及三种用白砂糖调味的产品：果酱、糖水水果和蜜饯水果。采用高效液相色谱法测定维生素C和多酚类化合物（酚酸和黄酮类）的含量。该研究证实，日本榅桲果酱可被视为维生素C和特定酚类物质的丰富来源。同时，所测试的产品在分析的酚类化合物水平方面存在显著差异，例如，用木糖醇调味的糖浆中所分析酚类物质的浓度明显高于用其他甜味剂调味的糖浆。考虑到各种加工方法和条件，并使用白砂糖以外的甜味剂，探索榅桲果实加工的可能性是值得注意的。
