Does anyone know what the effect of acidic condition (acetic acid solution, pH ~4-5.5) on the quality of ascorbic acid (vitamine C) is?
How long do you guess that we can keep this solution with constant air exposure?
There are chances of oxidation of ascorbic acid due high concentration of H+ ions in solution, hence more likely it will get degrade at low pH
It depends on the purity of the ascorbic acid. Pure ascorbate is quite stable but any slight contamination with iron or copper ions in aerobic conditions will generate rapid oxidation of ascorbate this is accelerated by low pH...
see G Buettner free radicals research communications 1986 1 349-53 ascorbate autoxidation in the presence of iron and copper chelates.
Pooya Davoodi Richard J Naftalin Hi I am just a student investigating in this topic. Shouldn't vitamin C yield increase as pH decreases? Because from my research online vitamin C is a weak acid that has a pKa value, indicating that it has a equilibrium, by increasing the number of H+ ions, should we have more acid yield due to Le Chatelier's Principle?
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