Utilization of areca nut (Arecha chatechu L.) extract for tannin based colorimetric indicator in smart packaging

Abstract

Areca nut contains tannin which has a great potential to apply as natural colour agent in food industries. Tannin offers specific colour and alter its colour due to environmental sensitivity. This study aims to fabricate a tannin-based colour indicator from areca nut in smart packaging in the form of a strip type and to characterize the indicator at different storage conditions and at various pH solutions. The indicators were synthesized using filter paper (No.1 and No.42) soaked in a solution with 1, 3, and 5% areca nut ethanolic extract. Then the indicators were stored at room temperature and 4-7°C for 10 days, then their Red Green Blue (RGB) coefficient values were measured. Characterization of the indicators at pH 3-10 were also determined by RGB coefficient. The results showed that the indicator stored at 4-7°C had more stable RGB coefficient than the indicator stored at room temperature indicated the indicator was influenced by the temperature factor. The indicator offered a potential to be used as a sensor on packaging of temperature sensitive foods. The indicator using Whatman paper No.42 with 1% of extract steadily decreased in RGB coefficient and changed its colour to darker in basic pH solution while the indicator with other treatments had unstable alteration RGB coefficient and colour.

Pemanfaatan Alat Pengupas Pinang Bagi Masyarakat Gampong Tualang Dalam Upaya Meningkatkan Produktivitas Buah Pinang

“…Pengolahan pinang umumnya yang diambil adalah bijinya. Biji pinang terdapat tanin sebesar 6,45% dari ekstraksi larutan air, dan 8,53% dari ekstraksi larutan etanol yang biasanya digunakan sebagai pewarna alami (Yanti et al, 2022). Untuk mendapatkan biji pinang ini maka pinang harus dikupas terlebih dahulu dari kulitnya.…”

Smart Packaging for Chicken Meat Quality: Absorbent Food Pad and Whatman Paper Applications

“…Smart packaging is the development of conventional packaging, which can monitor the freshness of food in real time and provide information on its quality, safety, and freshness. Materials added to the packaging can detect changes in properties such as pH, humidity, oxygen levels, or microbial contamination [9] In some studies, the material used to carry the spoilage detection material in packaged meat is Whatman paper [10,11] In this study, Whatman paper was used as a medium to carry Phenol Red (PR), and as a material that is expected to detect damage that occurs in packaged chicken meat.…”