Incorporation of gelatin and Fe²⁺ increases the pH-sensitivity of zein-anthocyanin complex films used for milk spoilage detection.

ABSTRACT: In this study, blueberry anthocyanins, gelatin and Fe²⁺ were incorporated into zein matrix via electrospinning method to prepare colorimetric indicator films for monitoring milk freshness. Gelatin and Fe²⁺ were incorporated into the film to improve visual discrimination of indicator films' color changes in milk with different freshness degrees and in solution with pH 3-7. Results of SEM, FT-IR and XRD showed that there were intermolecular hydrogen bonds among components, which associated with the larger color difference of indicator films. UV-vis spectral analysis showed that blueberry anthocyanin solutions containing both gelatin and Fe²⁺ displayed the highest intensity absorption peaks. The optimal ability to distinguish the pH (3-7) of solutions was pres

SUBMITTER: Gao R 

PROVIDER: S-EPMC9011025 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature