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Moisture Sorption Isotherms of Osmotically Dehydrated Sweet Pepper
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Jatindra Kumar Sahu
Published/Copyright:
October 31, 2007
Moisture sorption isotherms of osmotically dehydrated sweet peppers were determined at 15oC, 30oC and 40oC using static desiccator techniques. In the study, seven levels of water activity in range of 0.08 to 0.91 were used by the use of saturated salt solutions. The isotherms were found to be sigmoid type and of BET classification II. Out of seven sorption models i.e. BET, modified BET, Hasley, Caurie, GAB, Oswin and Smith, fitted to the experimental data, Oswin model was found to be the best for accurate prediction of moisture sorption isotherm with highest value of coefficient of determination (R2) and lowest values of standard error (SE) and relative deviation parentage (Rd). The value of monolayer moisture content of the osmotically dehydrated sweet pepper was found to be 3.037%, 3.934% and 4.432% (db) at 15oC, 30oC and 40oC respectively. The values of net isosteric heat of sorption as calculated by Clausius–Clapeyron equation showed a regular fall with increase in moisture content.
Keywords: sorption isotherm; sweet pepper; isosteric heat of sorption; Clausius–Clapeyron equation; modeling
Published Online: 2007-10-31
©2011 Walter de Gruyter GmbH & Co. KG, Berlin/Boston
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Keywords for this article
sorption isotherm;
sweet pepper;
isosteric heat of sorption;
Clausius–Clapeyron equation;
modeling
Articles in the same Issue
- Article
- Effect of Moisture Content on the Physical Properties of Fibered Flaxseed
- Sweet Bread Produced by the Lactic Acid Bacteria L. brevis and the Yeast S. cerevisiae
- Application of Desiccant Technology for Concentrating Liquid Foods - Experimental Investigation
- Adsorption Characteristics of Anthocyanins from Purple-fleshed Potato (Solanum tuberosum Jasim) Extract on Macroporous Resins
- A Non-Contact Computer Vision Based Analysis of Color in Foods
- Dynamic Effect in High Pressure Microbe Inactivation
- Study of the Influence of Product and Process Variables in the Salting and Post-salting Stages of PSE Thawed Hams
- Drying Behaviour and Energy Requirement for Dehydration of White Onion Slices
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- Sensitivity Analysis of a CFD Modelling System for Airflow and Heat Transfer of Fresh Food Packaging: Inlet Air Flow Velocity and Inside-Package Configurations
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