Question

Collect the wrappers of frozen and canned food items and milk. Find about the preservatives present in these food items. List the various preservatives and methods of their preservation

Answer 1

Answer: lists of some food and likely preservatives used.

packed food

preservatives

tomato sauce                                                              -                

sodium

benzoate

sorbets  

Answer 2

Answer :

The preservative found in frozen, canned food and milk is salt, sodium nitrile, and hydrogen peroxide.

Explanation :

• The preservative found is sodium nitrile in canned food.
• Foods in cans include canned beans, canned tomatoes, canned ham, canned asparagus, and more. Food in cans is preserved using sodium nitrite.
• Fruits, vegetables, fish, and other food items are cooked in sugar syrup or a canning salt solution before being placed inside a can. The can is then sterilised by boiling it in a water bath or by pressure canning. All bacteria will perish as a result of boiling at a high temperature, and airtight packaging will stop new microbes from penetrating the interior.
• Food products that are frozen include frozen meat, frozen pies, frozen vegetables, frozen fish, and more. Foods that are frozen don't need preservatives. However, salt can be used as a preservatives .
• The meal can be kept in the freezer for a very long time while still being frozen. The freezer inside has an extremely low temperature (lower than the freezing point). We are aware that harsh environments typically prevent microorganisms from growing. For this reason, microbial growth can be stopped by storing food in the freezer. The food supplies stay fresh for a very long time without germs.
• Due to its ability to reduce microbial growth and milk deterioration, hydrogen peroxide (H2O2) is frequently employed as a preservative in milk and milk products. Even in poorer nations, it is regarded as an "Excellent and Safe Preservative." Sodium benzoate, potassium sorbate, and natamycin are other significant preservatives found in dairy products.
• Milk is the primary component of all dairy products. The shelf life of raw milk is extremely brief. Preservatives are added to dairy products made from milk derivatives to extend the shelf life of the product as a solution to this problem.

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