An oxygen absorber is a small packet containing a material like activated iron powder that is placed inside airtight packaging to remove oxygen, creating an oxygen-free environment to extend the shelf life and preserve the quality of food and other products. It works by chemically reacting with oxygen through oxidation, turning the iron powder into iron oxide, and can also reduce odors with components like activated carbon. These are commonly used in food preservation for items like dried goods, baked goods,咖啡, ETC.
它是如何运作的?
- Chemical reaction: The primary component, iron powder, reacts with oxygen and moisture in the package to create iron oxide (锈).
- Removes oxygen: This chemical reaction effectively consumes the oxygen, reducing the oxygen concentration to less than 0.01% in a sealed container.
- Activators and other components: An activator, such as sodium, is often included to start the oxidation process. Activated carbon can also be added to absorb other gases and odors.
What it is used for?
- Food preservation: Extends shelf life and prevents oxidative damage like rancidity, mold, and discoloration in items such as:
- Dried fruits, vegetables, and herbs
- Nuts, grains, and coffee
- Processed and dried meats
- Baked goods
Important considerations
- Not a desiccant: An oxygen absorber is different from a silica gel packet, which is a desiccant that absorbs moisture, not oxygen.
- Requires airtight seal: An oxygen absorber is only effective in a sealed, air-tight container or package.
