In such studies, the rate of change is temperature dependent and it increases at higher temperatures similarly to most physicochemical reactions.Preservatives are generally additives that prolong the life span of foods and drinks.
Technically, preservatives are chemicals used to poison microorganisms and to prevent the food onto which it is added from fermentation and spoilage without causing any harmful effect to the consumer.
The uses of chemical preservatives enhance food quality, reduce waste and enhance consumer acceptability.
Friezer classifies chemical preservatives into three main types; anti microbial -such as benzoic acid, propionates; antioxidant -such as ascorbic acid, butylated hydroxyl anisole; and antibiotic -such as oxy tetracycline, nisin and lacto peroxidase.