Shrinking core model for extraction of phenylpropanoid amides of 5-hydroxytriptamine from safflower seed meal

• Published in: International journal of food science & technology Vol. 47; no. 8; pp. 1744 - 1749
• Main Authors: Jin, Qingzhe, Zhou, Li, Li, Jinwei, Wang, Xingguo, Liu, Ruijie
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01-08-2012; Wiley-Blackwell; Wiley Subscription Services, Inc
• Subjects: Biological and medical sciences; Ethanol; Extraction; Food engineering; Food industries; Food science; Fundamental and applied biological sciences. Psychology; General aspects; Kinetics; Mathematical models; phenylpropanoid amides of 5-hydroxytriptamine; Safflower; shrinking core model; Safflower; Seeds; phenylpropanoid amides of 5-hydroxytriptamine; Meal; Extraction; Models; shrinking core model
• ISSN: 0950-5423; 1365-2621
• DOI: 10.1111/j.1365-2621.2012.03029.x

Summary
A shrinking core model for extraction of phenylpropanoid amides of 5‐hydroxytriptamine (PAHAs) from safflower seed meal by 60% ethanol solution is established based on Fick’s first law. The kinetic equation for extraction is obtained and proved to fit the data very well. The internal diffusion of dissolving PAHAs from extracted layer to the particle external surface through particle channels is determined to be the rate‐limiting step. The shrinking core model was proved applicable to the meal which reduction ratio of particles is from 35 to 80 meshes and suitable for applying to the prediction and analysis on the process of PAHAs extraction from safflower seed by ethanol. The effects of size of raw material on the extraction efficiency are evaluated by the mathematical model, which could be used to predict and analyse extraction process of PAHAs from safflower seed meal by ethanol and provide a basis for process design and choice of operating conditions.