pH-indicating properties and storage stability of a smart edible film based on nopal-mucilage/gellan gum and red cabbage anthocyanins

Keywords: Edible films, nopal mucilage, acidic-basic indicators, red cabbage anthocyanins´ differential colorimetry


Nopal mucilage is a complex polysaccharide with great potential in the preparation of the films to food packaging. In this work, was develop a smart edible film with pH-indicating capabilities based on nopal mucilage, gellan gum, and red cabbage anthocyanins (70:20 w/w, and 10% respectively). Physical properties, appearance, and colorimetric functionality were characterized to pH range 2.5-5.9. Color stability, measured by CIELAB, was tested with different storage conditions and time and interpreted by differential tristimulus colorimetry. Results showed films whit uniform appearance, flexibility, easy-handling, and excellent color response within the pH range studied. The evolution of color difference (ΔE*ab) confirmed that the colorimetric functionality of films was stable at short storage periods (8 days) under natural conditions of sunlight and oxygen exposure, while a more extended storage period was affected. Results showed that the film is an excellent barrier and presents color changes triggered by pH changes.


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How to Cite
Solano-Doblado, L., Heredia, F., Gordillo-Arrobas, B., Davila-Ortiz, G., Alamilla-Beltran, L., Maciel-Cerda, A., & Jiménez-Martínez, C. (2020). pH-indicating properties and storage stability of a smart edible film based on nopal-mucilage/gellan gum and red cabbage anthocyanins. Revista Mexicana De Ingeniería Química, 19(Sup. 1), 363-374.
Food Engineering

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