4. Conclusion
The effects of the concentration of ascorbic acid and relative humidity on the oxidative stability of stripped bulk oils were analysed. The same concentration of ascorbic acid showed different oxidative stability in stripped bulk oils at different relative humidity. Generally, ascorbic acid showed increased antioxidant properties as the concentration of ascorbic acid increased from 0 to 84 ppm irrespective of relative humidity. Samples with ascorbic acid showed the highest oxidative stability in the moisture content of LC and MC environments. Transition metals and oxygen molecules may influence the antioxidant properties of ascorbic acid in stripped bulk oils at different relative humidity, although further research is needed to confirm this speculation.
Acknowledgments
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. 2012R1A1A22039387) and (No. 2013R1A2A2A01067293).