Bocker Ramon, Silva Eric Keven
School of Food Engineering, University of Campinas, Rua Monteiro Lobato, 80, Campinas, SP CEP:13083-862, Brazil.
Food Chem X. 2022 Jul 21;15:100398. doi: 10.1016/j.fochx.2022.100398. eCollection 2022 Oct 30.
Coloring compounds are widely applied to manufacturing foods and beverages. The worldwide food market is replacing artificial colorants with natural alternatives, given the increased consumer demand for natural products. However, these substitutes are still an issue due to their high production cost and low chemical and physical stability. Furthermore, natural pigments are highly sensitive to processes applied in conventional extraction techniques, such as thermal, mechanical, and chemical stresses. In this regard, pulsed electric field (PEF) technology has emerged as a promising non-thermal alternative for recovering and producing natural colorings from food matrices. Its action mechanism on cell structures through the electroporation effect is a smart alternative to overcoming the challenging issues associated with producing natural colorants. In this scenario, this review provides an overview of the PEF assisted extraction of natural pigments and colorants, such as anthocyanins (red-blue-purple), betalains (red), carotenoids (yellow-orange-red), and chlorophylls (green) from plant sources. Moreover, the potential and limitations of this emerging technology to integrate the extraction process of natural colorants were discussed.
着色化合物广泛应用于食品和饮料的生产中。鉴于消费者对天然产品的需求增加，全球食品市场正在用天然替代品取代人工合成色素。然而，这些替代品仍然存在问题，因为它们生产成本高，化学和物理稳定性低。此外，天然色素对传统提取技术中所采用的工艺，如热、机械和化学应力高度敏感。在这方面，脉冲电场（PEF）技术已成为一种有前景的非热替代方法，用于从食品基质中回收和生产天然色素。其通过电穿孔效应对细胞结构的作用机制是克服与生产天然色素相关的挑战性问题的明智选择。在这种情况下，本综述概述了PEF辅助从植物来源中提取天然色素和着色剂，如花色苷（红-蓝-紫）、甜菜碱（红）、类胡萝卜素（黄-橙-红）和叶绿素（绿）的情况。此外，还讨论了这种新兴技术在整合天然色素提取过程方面的潜力和局限性。
