An Effective Ostrich Oil Bleaching Technique Using Peroxide Value as an Indicator

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ID: 31055
2011
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Abstract
Ostrich oil has been used extensively in the cosmetic and pharmaceutical industries. However, rancidity causes undesirable chemical changes in flavour, colour, odour and nutritional value. Bleaching is an important process in refining ostrich oil. Bleaching refers to the removal of certain minor constituents (colour pigments, free fatty acid, peroxides, odour and non-fatty materials) from crude fats and oils to yield purified glycerides. There is a need to optimize the bleaching process of crude ostrich oil prior to its use for therapeutic purposes. The objective of our study was to establish an effective method to bleach ostrich oil using peroxide value as an indicator of refinement. In our study, we showed that natural earth clay was better than bentonite and acid-activated clay to bleach ostrich oil. It was also found that 1 hour incubation at a 150 °C was suitable to lower peroxide value by 90%. In addition, the nitrogen trap technique in the bleaching process was as effective as the continuous nitrogen flow technique and as such would be the recommended technique due to its cost effectiveness.
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Authors Chiew, Gan Seng;Haleagrahara, Nagaraja;Subramaniam, Thavamanithevi;Palanisamy, Uma Devi;Radhakrishnan, Ammu Kutty;Sivanathan, Muniswaran;
Journal molecules
Year 2011
DOI
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URL
http://www.mdpi.com/1420-3049/16/7/5709/
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