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257660

POMEGRANATE JUICE QUALITY AS AFFECTED BY SOME CLARIFICATION AND CONCENTRATION METHODS

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Last updated: 04 Jan 2025

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Abstract

The effect of some clarification and concentration methods on pomegranate juice quality was studied. The applied clarification methods were: natural clarification, 0.5 g/L gelatin, 0.4 g/L polyvinylpyrrolidone (PVP) and 0.02% v/v pectinex Ultra Sp-L addition. The clarified pomegranate juice with PVP at pH 3 was concentrated either by vacuum (V.C) or freeze (F.C) to 43.5 and 43.2° Brix, respectively. The effect of frozen storage on chemical characteristics and color indices of concentrated pomegranate juice during storage period was investigated. The results indicated that the PVP method was excellent for clarification and most suitable to prevent undesirable changes in anthocyanin content and browning index. Freeze concentration method caused less changes in chemical characteristics and color indices for reconstituted pomegranate juice. The best results were obtained after 12 months of storage when F.C method was applied. It was noticed that the removal of tannins by using finning agent (PVP) improved color, odor, taste, overall acceptability and the keeping quality of pomegranate juice.  

DOI

10.21608/jfds.2002.257660

Authors

First Name

M.

Last Name

Ashour,

MiddleName

M. S.

Affiliation

Food Technology Dept., National Research Center, Cairo, Egypt.

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City

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Orcid

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First Name

Enssaf

Last Name

El-Hamzy

MiddleName

M. A.

Affiliation

Food Technology Dept., National Research Center, Cairo, Egypt.

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Volume

27

Article Issue

12

Related Issue

36478

Issue Date

2002-12-01

Receive Date

2002-11-05

Publish Date

2002-12-01

Page Start

8,439

Page End

8,454

Print ISSN

2090-3650

Online ISSN

2090-3731

Link

https://jfds.journals.ekb.eg/article_257660.html

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https://jfds.journals.ekb.eg/service?article_code=257660

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Original Article

Type Code

886

Publication Type

Journal

Publication Title

Journal of Food and Dairy Sciences

Publication Link

https://jfds.journals.ekb.eg/

MainTitle

POMEGRANATE JUICE QUALITY AS AFFECTED BY SOME CLARIFICATION AND CONCENTRATION METHODS

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Article

Created At

22 Jan 2023