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Novel oxidation indicator films based on natural pigments and corn starch/ carboxymethyl cellulose

文献类型： 外文期刊

作者： Yan, Menglei 1 ; Wang, Weifei 2 ; Xu, Qingqing 1 ; Zou, Qian 1 ; Chen, Wen 1 ; Lan, Dongming 1 ; Wang, Yonghua 1 ;

作者机构： 1.South China Univ Technol, Sch Food Sci & Engn, Guangzhou 510640, Peoples R China

2.Guangdong Acad Agr Sci, Minist Agr & Rural Affairs, Sericultural & Argifood Res Inst, Guangdong Key Lab Agr Prod Proc,Key Lab Funct Food, 133 Yiheng St,Dongguanzhuang Rd, Guangzhou 510610, Peoples R China

3.Guangdong Yue Shan Special Nutr Technol Co Ltd, Foshan 528000, Peoples R China

关键词： Natural pigments; Oxidation film; Hydrogen peroxide; Oxidized oils; Color changes

期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：8.2； 五年影响因子：7.8 ）

ISSN： 0141-8130

年卷期： 2023 年 253 卷

页码：

收录情况： SCI

摘要： The existing oil oxidation detection methods are unsuitable for consumers to identify oil oxidation in a domestic setting. This study aims to develop indicator films detecting the degree of lipid oxidation with the naked eye. Purple sweet potato pigment (PSP) was chosen as a color indicator due to its response to hydrogen peroxide. The novel oxidation indicator films were prepared using corn starch, carboxymethyl cellulose (CMC), and varying concentrations of PSP. Fourier transform infrared spectroscopy spectra and scanning electron microscopy analysis confirmed the successful dispersion of PSP in the films. Thermal stability, light resistance, ultraviolet light resistance, mechanical resistance, and flexibility of films containing PSP were improved, enhancing the potential application in detecting oxidized substances. All the films exhibited noticeable color changes when exposed to different concentrations of hydrogen peroxide. These differences were more pronounced with higher levels of PSP. When these films were used to determine the degree of lipid oxidation, the Delta E value of the CS-PSP0.25 % film showed a linear relationship (R2 = 0.929) with the peroxide value, unlike other films. Therefore, it is reliable to infer the peroxide value of edible oil by observing the color of the films, which helps customers avoid consuming expired oils.

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