The addition of BHT and BHA in soy sauce model system tended to reduce furan concentration gradually after Day 15, even though it tended to cause irregular furan concentrations until Day 10.
In particular,the reduction rate of BHT at Day 30 was 83% on average. In previous studies related to BHA (Becalski & Seaman, 2005;Owczarek-Fendor et al., 2011), this antioxidant was shown to reduce furan formations by up to 70% compared to poly unsaturated fatty acids (PUFAs) under heat-treatment conditions. Therefore, it seems that as the average reduction rate of furan formation was about 52% when BHAwas added at Day 30 compared to the control. Thus, when examining the ability to decrease furan concentration, BHT had a better effect than BHA in this study (Day 30: 86.21 ± 1.40 ng/mL (control); BHT- 13.96 ± 0.89 ng/mL (0.05 M), 14.51 ± 1.10 ng/mL (0.1 M), 14.62 ± 1.80 ng/mL (0.2 M). BHA- 38.24 ± 4.39 ng/mL (0.05 M), 42.14 ± 4.52 ng/mL (0.1 M), 44.66 ± 3.78 (0.2 M) ng/mL,respectively).
Therefore, each of these antioxidants demonstrated effectiveness in reducing furan, and BHT was shown to be more
effective than BHA.