Can I evaporate away the alcohol in liquid herbalextracts by mixing the extract drops into hot water?
A small amount of the alcohol can be removed this way but most of it will stay intimately mixed with the hot water and will remain so even if the water is boiled. That’s because alcohol and water are chemical azeotropes and therefore are extremely difficult to separate once they have been mixed. While adding extracts to hot water will not eliminate their alcohol, it can, in some cases, actually damage the extract. Many extracts are heat stable (e.g., Goldenseal) and adding them to hot water does no harm. However, other extracts are damaged by heat (e.g., Valerian) and can be weakened by adding them to hot water. Also, essential oils and other non-water-soluble aromatic compounds found in certain extracts (e.g., Lemon Balm, Chamomile) do not mix well with water and can therefore evaporate away from the hot water. Here you are left with a compromised extract, but the alcohol remains.
