Learn the science behind why homemade mint extract changes color so fast. Discover how oxidation affects its vibrant green hue.
1 Answer
Mint extract discolors quickly after exposure to air due to oxidation of the chlorophyll and other volatile compounds present in the extract. This process is accelerated by light and heat.
Detailed Explanation:
Mint extract derives its flavor and color primarily from chlorophyll and various volatile organic compounds extracted from mint leaves. Chlorophyll, the pigment responsible for the green color, is particularly susceptible to degradation when exposed to oxygen. This process, known as oxidation, causes the chlorophyll molecule to break down, leading to a loss of the vibrant green color and the formation of brownish or yellowish compounds.
Furthermore, the volatile compounds that contribute to mint's characteristic aroma and flavor are also prone to oxidation and evaporation. These compounds react with oxygen in the air, altering their chemical structure and resulting in a change in both the color and the overall quality of the extract. Light and heat act as catalysts, speeding up these oxidation reactions and accelerating the discoloration process. The higher the temperature and the more intense the light, the faster the mint extract will degrade.
Pro Tip:
To minimize discoloration, store mint extract in a tightly sealed, dark-colored glass bottle in a cool, dark place, such as a refrigerator. This will help to slow down the oxidation process and preserve the extract's color and flavor for a longer period.