Learn why chopped onions act like a sponge for fridge odors. Discover the science behind it and why proper storage in a sealed container is essential.
1 Answer
Chopped onions absorb fridge smells due to their porous structure and sulfur compounds, which readily attract and trap volatile odor molecules. Storing them properly can prevent this.
Detailed Explanation:
Chopped onions are highly absorbent because of their cellular structure. When an onion is cut, its cells are damaged, creating a larger surface area that is exposed to the surrounding environment. This increased surface area makes it easier for the onion to absorb odors.
Furthermore, onions contain sulfur compounds. These compounds are responsible for the onion's pungent smell and taste. They are also highly reactive and readily bind with other volatile organic compounds (VOCs) present in the fridge, which are often the source of unpleasant smells. The sulfur compounds essentially act like magnets, attracting and trapping these odor molecules.
Because of these two factors – the porous structure and the presence of sulfur compounds – chopped onions act like a natural air purifier, absorbing any lingering smells in your refrigerator. However, this also means that the onions themselves will take on those odors, making them less palatable.
Pro Tip:
To prevent chopped onions from absorbing fridge smells, store them in an airtight container or a sealed plastic bag in the crisper drawer. This will minimize their exposure to other odors and keep them fresh for longer.