This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Web of Science (1) Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Ortega-García, J. Articles by Noriega-Rodriguez, J. A. Search for Related Content Social Bookmarking                         What's this?

Optimisation of Bleaching Conditions for Soybean Oil Using Response Surface Methodology

Departamento de Investigaciones Científicas y Tecnológicas de la Universidad de Sonora, PO Box 1819, 83000, Hermosillo, Sonora, México, jortega{at}guayacan.uson.mx

L. A. Medina-Juárez

Departamento de Investigaciones Científicas y Tecnológicas de la Universidad de Sonora, PO Box 1819, 83000, Hermosillo, Sonora, México

N. Gámez-Meza

Departamento de Investigaciones Científicas y Tecnológicas de la Universidad de Sonora, PO Box 1819, 83000, Hermosillo, Sonora, México

J. A. Noriega-Rodriguez

Departamento de Investigaciones Científicas y Tecnológicas de la Universidad de Sonora, PO Box 1819, 83000, Hermosillo, Sonora, México

The refining process applied to soybean oil (SBO) in order to obtain the desirable purity characteristics as edible oil, produces chemical changes by partially removing desirable components such as tocopherols. In this study, the effect of temperature (76.4-143.6°C), contact time (6.4-73.6min) and clay amount (0.16-1.84% w/w) on tocopherol content and quality of SBO were evaluated. Neutralised soybean oil was subjected to bleaching using different clay amounts (Tonsil Optimum 320 FF), stirring (250rpm), and partial vacuum (60mmHg). A response surface methodology (RSM) was used to find the parameters that produce bleached oil with minimum peroxide value (PV), maximum tocopherol retention (TOCR) and light colour. The optimal bleaching conditions for SBO were: temperature, 96°C; time, 23min; clay amount, 1.4% w/w oil. Under these conditions, a bleached soybean oil with 0.1meq/kg of PV, 91.74% of TOCR, and colour 1.53 Lovibond red value units was obtained.

Key Words: bleaching • soybean oil • colour

Food Science and Technology International, Vol. 11, No. 6, 443-449 (2005)
DOI: 10.1177/1082013205060677


CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?