Kajian potensi ekstrak bilberi sebagai penunjuk ph untuk memantau kesegaran makanan secara kromametri

Translated title of the contribution: Potential study of bilberry extract as a pH indicator to monitor food freshness by chromametry

Noor Azizah Ahmad, Yook Heng Lee, Faridah Salam, Sharina Abu Hanifah

Research output: Contribution to journalArticle

Abstract

The use of pH indicator as an approach to monitor the quality or freshness of foods has the attention of the food packaging industry. The use of natural resources, especially plant pigments of fruits and vegetables has now become the user’s choice to replace synthetic dyes as indicators to ensure the safety of the food-consumed every day. In this study, bilberry extract was used for a pH-sensitive dye. The colour change of the sample was studied in details by chromametric and spectrophotometric methods. The bilberry extract was observed to produce bright red colour under acidic conditions, faded at neutral and changed from magenta to yellow in alkaline conditions. The results of detail chromametric studies showed that bilberry extracts were able to exhibit distinguishable colour changes at different pHs, which led to a change in a* value that eventually contributed to significant changes in the total colour difference (ΔE*). The ΔE* value also demonstrated a linear and quantitative relationships to certain pH ranges. Therefore, bilberry extract has the potential to be used as a sensor material in developing a pH sensor for the purpose of monitoring food freshness, especially packaged fishery products since deterioration level is closely related to alkaline pH changes.

Original languageMalay
Pages (from-to)2685-2691
Number of pages7
JournalSains Malaysiana
Volume47
Issue number11
DOIs
Publication statusPublished - 1 Nov 2018

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bilberries
freshness
monitoring
extracts
color
dyes
plant pigments
food packaging
natural resources
food safety
vegetables
deterioration
fisheries
industry
fruits

ASJC Scopus subject areas

  • General

Cite this

Kajian potensi ekstrak bilberi sebagai penunjuk ph untuk memantau kesegaran makanan secara kromametri. / Ahmad, Noor Azizah; Lee, Yook Heng; Salam, Faridah; Abu Hanifah, Sharina.

In: Sains Malaysiana, Vol. 47, No. 11, 01.11.2018, p. 2685-2691.

Research output: Contribution to journalArticle

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