Optimisation of the supercritical extraction of toxic elements in fish oil
This study aims to optimise the operating conditions for the supercritical fluid extraction (SFE) of toxic elements from fish oil. The SFE operating parameters of pressure, temperature, CO2 flow rate and extraction time were optimised using a central composite design (CCD) of response surface meth...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor and Francis
2014
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/38953/1/Food_Additives_Contaminants.pdf http://irep.iium.edu.my/38953/ http://www.tandfonline.com/toc/tfac20/current#.VFH8G1HzTFY |
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| Summary: | This study aims to optimise the operating conditions for the supercritical fluid extraction (SFE) of toxic elements from fish oil.
The SFE operating parameters of pressure, temperature, CO2 flow rate and extraction time were optimised using a central
composite design (CCD) of response surface methodology (RSM). High coefficients of determination (R2
) (0.897–0.988) for
the predicted response surface models confirmed a satisfactory adjustment of the polynomial regression models with the
operation conditions. The results showed that the linear and quadratic terms of pressure and temperature were the most
significant (p < 0.05) variables affecting the overall responses. The optimum conditions for the simultaneous elimination of
toxic elements comprised a pressure of 61 MPa, a temperature of 39.8ºC, a CO2 flow rate of 3.7 ml min−1 and an extraction
time of 4 h. These optimised SFE conditions were able to produce fish oil with the contents of lead, cadmium, arsenic and
mercury reduced by up to 98.3%, 96.1%, 94.9% and 93.7%, respectively. The fish oil extracted under the optimised SFE
operating conditions was of good quality in terms of its fatty acid constituents. |
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