Application of sepiolite in clarification of pomegranate juice: changes on quality characteristics during process

Summary In this study, for the first time, the function of acid‐activated sepiolite clay was evaluated for clarification of pomegranate juice. The optimum conditions of clarification process were achieved using response surface methodology based on juice turbidity as a response. After that, under op...

Full description

Saved in:
Bibliographic Details
Published in:International journal of food science & technology 2016-07, Vol.51 (7), p.1666-1673
Main Authors: Mirzaaghaei, Marzieh, Goli, Sayed Amir Hossein, Fathi, Milad
Format: Article
Language:English
Subjects:
Activation
bentonite
Clay (material)
Color
Finings
Food processing industry
Food quality
Food science
Fruit juices
Juices
kinetic
Optimization
Pomegranates
Sepiolite
specific surface area
Turbidity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Summary In this study, for the first time, the function of acid‐activated sepiolite clay was evaluated for clarification of pomegranate juice. The optimum conditions of clarification process were achieved using response surface methodology based on juice turbidity as a response. After that, under optimal condition, efficiency of sepiolite, bentonite and combination of these fining agents with gelatin and kieselgel was compared for clarifying pomegranate juice. The results showed that the best conditions for juice clarification were 0.05% (w/v) clay concentration, temperature of 50 °C and time of 2 h. The results revealed that treatments of bentonite–gelatin–kieselgel and sepiolite–gelatin–kieselgel were the most active fining agents that their use led to a reduction of 99.7% in turbidity of pomegranate juice. Kinetic study for different features was performed, and the results indicated that rate of changes in turbidity, viscosity, total phenolic contents and colour with time followed first‐, first‐, zero‐ and zero‐order kinetic models, respectively. Sepiolite was firstly activated using a strong acid. The optimum conditions of clarification process were achieved using response surface methodology based on juice turbidity as a response. The function of acid‐activated sepiolite clay was evaluated and compared with commercial clarifying agents for clarification of pomegranate juice in respect to the values of TPC, color, viscosity and turbidity.
ISSN:0950-5423
1365-2621
DOI:10.1111/ijfs.13138