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  • Title: Recent advances in pH-sensitive indicator films based on natural colorants for smart monitoring of food freshness: a review.
    Author: Zhang J, Liu S, Xie C, Wang C, Zhong Y, Fan K.
    Journal: Crit Rev Food Sci Nutr; 2024; 64(33):12800-12819. PubMed ID: 37702748.
    Abstract:
    As a new type of packaging method, natural pigment-based pH-sensitive indicator film packaging can be used to intelligently monitor food freshness, provide consumers with intuitive food freshness information, and own the advantages of small size, low cost and intuitive accuracy. Based on the introduction of the principle of natural pigment in pH-sensitive indicator film intelligent packaging, this paper reviews the types of natural pigment indicators (such as anthocyanins, curcumin) and film-forming matrix materials, and systematically discusses the research progress of their application in freshness monitoring in various foods, and points out the limitations of this intelligent packaging in practical applications. In order to provide natural pigment in the application and promotion of pH-sensitive indicator film packaging for monitoring food freshness, further research and development works are required to overcome the current limitations. The needs for further research and developments are outlined.
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