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INVESTIGATING PEROXIDES AND ACID VALUE IN USED EDIBLE VEGETABLE OILS . | ||
| The Iraqi Journal of Agricultural Science | ||
| Article 1, Volume 41, Issue 4, 2010, Pages 123-132 | ||
| Authors | ||
| Nibras M. Abbas; Arif M. L. Al-Fatlawi | ||
| Abstract | ||
| ABSTRACT : Four selected oils their trade names are Alkhair, Orkide, Bizce, and Sandy after subjected each to two different frying temperatures 130o C and 170o C. The frying temperature of each interval was 20 minutes. The food stuff that subjected to frying were potato, mince meat, and fish. This transfer from 130o C to 170o C using same frying time (20 minutes) was noticed to cause changes in values of A.V. of pure oil higher than that changes of P.V. for pure oil. This transfer also caused a decrease of P.V. using pure Bizce while it caused a minimum decrease using pure Sandy. This decrease in P.V. using Bizce oil was from 23 to 9.84 meq peroxide / Kg oil, while a minimum decrease in P.V. was recorded for Sandy oil from 15.6 to 9.58 meq peroxide / Kg oil. Comparing the performance (in terms of P.V.) of pure vegetable oils this performance was recorded better at frying temperature 170o C. The maximum value of peroxide recorded in this work when foods (potato-P, mince meat-M, and fish-F) were subjected to frying processes at 130o C, and 170o C was 22.7 meq where mince meat-M fried at 130o C and using Bizce oil, then peroxide value equal 15.9 meq when potato-P fried at 130o C using Alkhair oil then peroxide value equal 14.4 meq when potato-P fried at 170o C using Alkhair oil. In this work the acid value A.V. of oils was increased whether oils were pure-P, or the oils were with foods: potato-P, mince meat-M and fish-F during frying change from 130 oC to 170 oC. This change in temperature caused a decrease in acid value A.V. using Bizce pure oil-OP from 0.97 to 0.71 mg KOH. Maximum value of acid value A.V. for foods: fried at 130 oC, and 170 oC were 0.71 mg KOH for mince meat-M fried at 130 oC using Bizce oil, and 0.66 mg KOH (table 6) for fish-F fried at 170 oC using Sandy oil. | ||
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