School of Life Science, Anhui Agricultural University, 130 West Changjiang Rd, Hefei, Anhui, 230036, China.
Hefei No.45 middle school, 103 Tongcheng Rd, Hefei, Anhui, 230061, China.
J Food Sci. 2022 Jul;87(7):3036-3047. doi: 10.1111/1750-3841.16222. Epub 2022 Jun 8.
The chemical instability of gardenia yellow pigment (GYP) limits its utilization in the food industry. In this study, the effects of different antioxidants (0.2% of tea polyphenols, sodium phytate, potassium citrate, and ascorbic acid) and microencapsulating agents (gum Arabic, maltodextrin, inulin, and gum Arabic/maltodextrin) on the degradation of GYP under different conditions (heat, light, and ferric iron) were evaluated. Then, the characteristic properties of microcapsules coated with gum Arabic/maltodextrin, gum Arabic/maltodextrin/tea polyphenols, maltodextrin, and maltodextrin/tea polyphenols were investigated. Furthermore, food models were simulated to evaluate the GYP stability of the microcapsules. The results showed that tea polyphenols, maltodextrin, and gum Arabic/maltodextrin significantly improved the GYP stability. Moreover, the presence of GYP in microcapsules was confirmed by nuclear magnetic resonance and Fourier transform infrared spectroscopy. In addition, GYP-MD/TP possessed high thermal stability under different cooking methods. PRACTICAL APPLICATION: Gardenia yellow pigment (GYP) is easily degraded under light and high-temperature conditions, which limits its applications in the food industry. This study will provide effective clues for expanding the practical applications of GYP in the natural pigment industry.
栀子黄色素（GYP）的化学不稳定性限制了其在食品工业中的应用。本研究评价了不同抗氧化剂（0.2%茶多酚、植酸钠、柠檬酸钾和抗坏血酸）和微胶囊化剂（阿拉伯胶、麦芽糊精、菊粉和阿拉伯胶/麦芽糊精）对 GYP 在不同条件（热、光和三价铁）下降解的影响。然后，研究了用阿拉伯胶/麦芽糊精、阿拉伯胶/麦芽糊精/茶多酚、麦芽糊精和麦芽糊精/茶多酚包衣的微胶囊的特性。此外，还模拟了食品模型来评估微胶囊中 GYP 的稳定性。结果表明，茶多酚、麦芽糊精和阿拉伯胶/麦芽糊精显著提高了 GYP 的稳定性。此外，通过核磁共振和傅里叶变换红外光谱证实了微胶囊中存在 GYP。此外，GYP-MD/TP 在不同的烹饪方法下具有较高的热稳定性。
栀子黄色素（GYP）在光照和高温条件下容易降解，限制了其在食品工业中的应用。本研究将为扩大 GYP 在天然色素工业中的实际应用提供有效的线索。
