Work

Development and application of pH ‐indicator film based on freeze‐dried purple‐fleshed sweet potato, starch, and CMC

Year: 2023

Type: article

Abstract: Summary Smart packaging is an emergent solution commonly used to indicate the current quality and freshness of the food. In this study, a pH indicator film without an anthocyanin‐extraction step was developed, based on purple‐fleshed sweet potato powder (SPP) prepared by freeze drying process, with starch or starch and carboxymethyl cellulose (CMC). The colour of the powder and the films changed from pink to green with the pH change from 1 to 11. The effectiveness of the indicator films was assessed by the ground beef spoilage trial, which resulted in a colour change from purple to green when the pH of the meat raised from 5.54 to 7.92. The microbiological growth and the sensory changes of the meat confirmed the deterioration process. Therefore, developed indicator films could successfully indicate the spoilage of packaged ground beef.

Source: International Journal of Food Science & Technology

DOI: 10.1111/ijfs.16459

Authors: Mariá Toledo de Carvalho Silva, Paulo Cezar da Cunha Júnior, Cristiane Grella Miranda, Ana Carla Kawazoe Sato, Mariana Teixeira da Costa Machado, Elisa Helena da Rocha Ferreira

Institutions: Universidade Federal Rural do Rio de Janeiro, Universidade Estadual de Campinas (UNICAMP)

Language: English

Topic: Nanocomposite Films for Food Packaging

Subfield: Biomaterials

Field: Materials Science

Domain: Physical Sciences

SDGs: Zero hunger, Responsible consumption and production

Open Access status: bronze

Funders: Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Conselho Nacional de Desenvolvimento Científico e Tecnológico