Anthocyanin Colorimetric Strip for Volatile Amine Determination. (18th June 2020)

• Record Type: Journal Article
• Authors: Agunos, Ricarl Irish F.; Mendoza, Danilet Vi M.; Rivera, Michael Angelo S.
• Other Names: Yanez Jaime Academic Editor.
• Is Part Of: International journal of food science. Volume 2020(2020)
• Publication Date: 2020-06-18
• Subjects: Food -- Periodicals; Food industry and trade -- Periodicals; Food; Food Industry; Food; Food industry and trade; Periodicals; Electronic journals; Periodicals; Electronic journals; 664
• DOI: 10.1155/2020/1672851
• Languages: English
• ISSNs: 2356-7015

Abstract

Abstract : Food freshness is one of the main concerns of consumers. Food spoilage is mainly caused by contamination and microbial growth in which the latter produces volatile amines in the process. Several methods have been used to determine volatile amines to indicate food freshness, and indicator films are deemed as the most time-efficient and economical. In this study, anthocyanin was extracted from mangosteen rind as a natural dye indicator and was incorporated in a chitosan/PVA polymer matrix. The film with different concentrations of anthocyanin extract (5%, 15%, and 25%) was prepared and tested for their sensitivity to 136 ppm ammonia vapor followed by colorimetric analysis using ImageJ software. The film with 25% anthocyanin yielded the most visible color change upon exposure to ammonia vapor. The color changed from pink to yellowish-brown within 14 minutes of exposure. The RGB-converted images of the film with 25% anthocyanin extract showed gradual loss of red coloration being replaced by cyan spots. FTIR spectra showed incorporation of anthocyanin to the chitosan/PVA matrix with the decrease in the intensity of the C-N stretching peak. Thermogravimetric analysis showed that the film has high thermal stability with onset temperature of 310.43°C. Thus, the film developed is an excellent candidate for optimization and production of a thermally stable amine detector for food products.