Question

Give two examples of: chemical preservatives: Natural preservatives:
Methods of preservation:​

Answer 1

Answer:

Natural preservatives include rosemary and oregano extract, hops, salt, sugar, vinegar, alcohol, diatomaceous earth and castor oil. Traditional preservatives, such as sodium benzoate have raised health concerns in the past.

Answer 2

Answer:

There are three classes of chemical preservatives commonly used in foods:

Benzoates (such as sodium benzoate)

Nitrites (such as sodium nitrite)

Sulphites (such as sulphur dioxide)

Natural preservatives include rosemary and oregano extract, hops, salt, sugar, vinegar, alcohol, diatomaceous earth and castor oil.

Among the oldest methods of preservation are drying, refrigeration, and fermentation. Modern methods include canning, pasteurization, freezing, irradiation, and the addition of chemicals.