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从虹膜花中提取和表征素颜料,并形成金属复合体
Zaker Bahreini1, Mohammad Abedi1, Alireza Ashori1
1Department of Chemical Technologies, Iranian Research Organization for Science and Technology (IROST), Tehran, Iran.
Heliyon
|June 4, 2024
概括
研究人员探索了和铜等金属离子如何稳定虹膜花色素 (氨酸) 的蓝色. 这项研究确定了关键的颜料及其相互作用,为天然食品色素提供了洞察力.
科学领域:
- 农业和食品化学 农业和食品化学
- 植物生物化学 植物生物化学
- 协调化学 协调化学
背景情况:
- 氨酸是天然的颜料,具有作为食品染料的潜力.
- 金属-氨酸复合物 (金属氨酸) 可以稳定和修改氨酸颜色.
- 了解蓝色安东素与金属相互作用的化学成分对于应用至关重要.
研究的目的:
- 为了从虹膜花中提取和识别反素.
- 为了研究纯化虹膜安托素与 (Al3+) 和铜 (Cu2+) 离子的复合.
- 阐明协调化学,负责金属氨酸的形成和颜色的修饰.
主要方法:
- 从新鲜的虹膜花中优化酸性提取反素.
- 在pH值5-6时,纯化的安托基安与Al3+和Cu2+复合.
- 使用紫外线可见光谱学,色谱学 (L*a*b*值),FTIR光谱学和LC-MS进行表征.
主要成果:
- 金属复合诱导了吸收最大的巴托克罗姆变化 (例如,Al的538nm到584nm,Cu的538nm到700nm).
- 观察到的颜色变化包括光度下降和a*和b*颜色系数的变化.
- 在LC-MS中,发现了五种主要的酸盐:酸,酸,酸,酸,酸,酸,酸,酸,酸,酸,酸,酸,酸,酸,酸,酸.
结论:
- 成功地从虹膜花中分离和识别了关键的安托素颜料.
- 阐明了金属化相互作用导致蓝色和绿色金属酸的形成.
- 提供了关于扩大花颜色生产的化学知识和自然色素开发的潜力.
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