Abstract
Color is one of the main sensory properties in the food industry. Currently, there is a global interest to replace synthetic colorants with natural compounds. In line with this, many plants have been shown to serve as sources of natural pigments. Elucidation of their chemical structures has allowed the identification of several compounds such as carotenoids, chlorophyll, betalains, anthocyanins, and flavonoids, whose popularity has increased due to the health benefits associated with their consumption. One of the most important steps in the production and extraction of plant-derived pigments is extraction. Soxhlet extraction, maceration, and carbon dioxide extraction are conventional methods that have been widely used at the laboratory, pilot, and industrial scales for this purpose. However, in the last years, several nonconventional methods, such as ultrasound- and microwave-assisted extraction, high pressure, supercritical fluid extraction, and electric and pulsed electric field extraction, have emerged as alternatives to conventional methods aimed to reduce the use of organic solvents and extraction time, without being harmful to the environment. In this study, the classification and extraction of plant-derived pigments, their economic importance, trends, and challenges for their use and extraction in the food industry are reviewed.
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Rafael López-Cruz investigated and wrote the section on extraction techniques. Teresa Sandoval-Contreras investigated and wrote the section on the classification of plant pigments. Maricarmen Iñiguez-Moreno had the manuscript conceptualization; wrote the introduction, economic importance, trends, and conclusion section; and designed the figures and tables. All authors have reviewed and approved the final version of the manuscript before submission.
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López-Cruz, R., Sandoval-Contreras, T. & Iñiguez-Moreno, M. Plant Pigments: Classification, Extraction, and Challenge of Their Application in the Food Industry. Food Bioprocess Technol 16, 2725–2741 (2023). https://doi.org/10.1007/s11947-023-03075-4
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DOI: https://doi.org/10.1007/s11947-023-03075-4