Learn the science behind why lentils absorb moisture from the air. This is why using a truly airtight container for storage is so important.
1 Answer
Lentils absorb moisture from the air due to their hygroscopic nature, meaning they readily attract and hold water molecules from their surroundings. This is because of the composition of lentils, which includes carbohydrates and proteins that have an affinity for water.
Detailed Explanation:
Lentils, like many other dried foods, are hygroscopic. This means they have the ability to absorb moisture from the surrounding environment. This absorption happens because the carbohydrates and proteins within the lentil structure contain polar molecules. Water molecules are also polar, and 'like attracts like.' The polar nature of the lentil components creates an attraction to the water molecules present in the air. When the humidity is high, there are more water molecules in the air, leading to increased absorption by the lentils. Over time, this moisture absorption can affect the texture and even the shelf life of the lentils, potentially leading to clumping or spoilage if not stored properly. The drier the lentils are initially, and the more humid the environment, the faster they will absorb moisture.
Pro Tip:
To prevent lentils from absorbing moisture, store them in airtight containers in a cool, dry place. Adding a desiccant packet (like those found in vitamin bottles) can further help absorb any excess moisture within the container.