The changes in FFA and POVs during storage of soy
bean oil at 25 and 45 C after addition of synthetic
antioxidants, are given in Table 3. It is apparent from
these results that addition of BHA and BHT retarded
the development of rancidity in soy bean oil but BHT
resulted in better protection than BHA. The FFA values
were reduced from 0.320% (control) to 0.102% and
0.078% by the addition of BHA and BHT, POVs
decreased from 79 meq/kg (control) to 8.0 and 6.0 meq/
kg, respectively, after 60 days’ storage at 45 C. At
25 C, the addition of BHA and BHT caused reduction
in FFA values from 0.164 (control) to 0.095 and
0.080%, respectively, during storage for 60 days. Similarly,
POVs were also reduced from 56.0 meq/kg (control)
to 7.0 and 5.80 meq/kg by the addition of BHA
and BHT, respectively, during 60 days, storage at 25 C.
These results are consistent with findings of Kiyomi and
Yasuko (1995) and Yanping, Mourning, Yuhang, and
Zhiying (1999) who reported that lipid peroxides were
significantly reduced by the addition of antioxidants in
processed foods and oils. Kathy, Randel, Peter, and
George (1994) suggested that addition of BHA, along