Encapsulation of carotenoids extracted from Navel orange and Clementine Tangerine peel extract as a by-product.

Document Type : Original Article

Authors

1 Agriculture research center food technology research institue

2 Al Azhar univeristy

3 food technology research institute , Agriculture Research Center

4 Agriculture research center

Abstract

Carotenoids are pro-vitamin A, natural pigments and strong antioxidants. Encapsulation technology protects carotenoids against degradation and increases stability in food products. In this work, the carotenoid extract from Navel Orange peel (NOP) and Clementine Tangerine peel (CTP) was used. The study was designed for encapsulation in microstructures by three concentrations of carotenoid (3, 7 and 9 %) using the same coating agent (maltodextrin with Arabic gum15% w/v).The evaluation of physicochemical carotenoid stability of the encapsulated carotenoid extract. The result showed that the total carotenoids after microencapsulation for NOP and CTP, 3 and 7% were significantly higher than 9%. The antioxidant activity of CTP is higher than NOP when measured by ABTS•+ assays. The encapsulation efficiency (EE) of microcapsules content of 7% carotenoid was the highest efficiency for NOP and CTP extract. The size of the micro-particles was determined by transmission electron microscope (TEM) which showed it less than 1µm after encapsulation, ensuring good solubility in an aqueous solution. Shape microcapsules had an irregular shape and were amorphous with porous and slab forming a structure that was similar to each other in morphology under scanning electron microscopy (SEM). Assessment of β-carotene content in NOP and CTP encapsulated extract by HPLC the β-carotene of the CTP extract was twice the β-carotene of the NOP extract. Also, the assessment of moisture and water activity for NOP and CTP encapsulated ranged between 4.59–6.07%, 0.26–0.32, 5.72–6.81% and0.303–0.32 respectively. The purpose of the study was to extract natural carotenoids from Navel Oranges and Clementine Tangerine Peels and to study their functional properties and their possible use as additives with certain foods. It can be used in foods as pro-vitamin A, nature pigment, and antioxidants.

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Egyptian Journal of Chemistry
Volume 66, Issue 13 - Serial Number 13
Special Issue: Applied Chemistry for Greener Life and Sustainability
December 2023
Pages 907-921

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History

  • Receive Date: 09 February 2023
  • Revise Date: 11 May 2023
  • Accept Date: 28 May 2023

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