Chitosan combined with organic acid: Organic acids are weak acids and do not dissociate completely in water, whereas the strong mineral acids do. Contrary to the use of mineral acids, organic acids
are easy to handle, non-corrosive in nature, biodegradable and cause no harm to the coated fruit and vegetable. They have been used as substitutes for sulfite to prevent enzymatic browning, alone or in
combination with antimicrobial agent