Vitamins play significant roles in human bodily functions such as
immunity, metabolism and digestion. According to experts, vitamin C
is one of the safest and most effective nutrients in food science. Most
of the studies show that using 500 mg of vitamin C daily is necessary
to achieve health results. Therefore, it is very important for the determination
of vitamin C in food samples. Numerous electrochemical
methods have been used for the determination of vitamin C in food
samples [51–60]. Nicotin amide adenine dinucleotide (NADH) is an important
coenzyme and plays a key and virtual role in energymetabolism
by accepting and donating electrons. On the other hand, NADH oxidation
in ocular tissues can be effective in the presence of ascorbic acid
[61]. So, determination of the above compounds is very important in biological,
food and pharmaceutical samples.