State and explain the various methods for preventing or retarding rancidity of food.
For preventing or retarding rancidity of food, following methods can be applied:
(1) Use of antioxidants:
Antioxidants are those substances that prevent oxidation.
(2) Use of nitrogen gas:
Nitrogen gas is added during the packaging of the potato chips to prevent oxidation of fat and oil because it is an unreactive gas.
(3) Use of airtight containers:
Preserving food in airtight containers reduces its exposure to oxygen and thus slows down the oxidation process.
(4) Use of refrigerator:
Preserving food in the refrigerator slows down rancidity.