Effect of acid, base and ZnO nano particles on degradation of vitamin C

The L-enantiomer of ascorbic is called vitamin C. The health benefits of vitamin C are wellknown phenomenon. However, the exact role of vitamin C is still unknown [1]. Vitamin Chas two chiral centers with four steroisomers. The L-ismomers assumed to be beneficial forhuman, but very little is known about the other three isomers [2]. The ascorbate monoionpossesses both acid and base properties [3]. Finally, the effect of nano-composite packagingcontaining Ag and ZnO on deactivation of Lactobacillus plantarum in fresh orange juice hasbeen reported by Emamifar et al. [4a-c]. Recently, Dabbagh and coworkers also reportedracemization, stability and tautomerism of vitamin C stereoisomers in water were studiedexperimentally and theoretically using NMR, FT-IR, specific rotation and DFT techniques[5].