K Nn mK - Amecamex.org.mx

FSBI – 2004
Food Science and Biotechnology in Developing Countries
The treatments at 100º and 120º C did not have significant effect (α=0.05), they did not had good
results on PC. In comparison, the treatments at 20º, 70º and 110º C were good. In other hand, the
agitation time (10 and 20 minutes) had significant effect (α=0.05) on PC, meanwhile 20 and 30
minutes did not had (results not presented).The best results were 3.25 units PC at 70º and 3.1 units
PC at 20º C. Both presented an acceptable PC and the yield was 80 %.
Lyon and Becker (1987) bleached neutralized oil from amaranth seed (A. cruentus) using adsorption
method. They found that the best method for bleaching was the mixture of clays 2 % (Filtrol–105 FAC)
and activited charcoal 0.2 % (Norit–A) at 110° C, and recovered 94.3 % of bleached oil (7). We
obtained 80 % oil bleached (A. hypochondriacus) smaller than recovered by Lyon and Becker.
The advantage for bleaching as this work, is that it can do it using 20º C with the mixed clay and
activated charcoal, since it would diminish the cost of bleaching method, it does not require energy to
heat the mixture, and an acceptable PC is obtained in the amaranth oil (figure 3).
Conclusions
The best result of the method 1 was 1.01 units PC at 120º C obtaining 50 % yield. The best results of
method 2 were 3.25 units PC at 70º C and 3.1 units PC at 20º C obtaining 80 %yield. We recommend
to employ the method 2 at 20º C because it would diminish the cost of treatment, and the oil obtained
presented characteristic edible oil color.
Acknowledgments
We thank the programs PIFI, PIBP and COFAA for financial support for the realization of this work.
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