The presence of small vortexes or swirling motions at the bottom of a pan of boiling water is typically unrelated to the leaching of metals from the pan. These swirling motions are a common phenomenon known as convection currents, which occur due to the temperature variations within the water.
When water is heated, it becomes less dense and rises to the surface while cooler water near the surface sinks. This movement of water forms convection currents, which can create swirling or vortex-like patterns. These patterns help distribute heat evenly throughout the water and contribute to the boiling process.
Leaching of metals from a pan usually occurs when there is a chemical reaction between the metal of the pan and the substances in the food or water. While some metals may be released into the water during cooking, it is not typically indicated by the presence of swirling motions or vortexes. Instead, the leaching of metals can be influenced by factors such as the type of pan, the duration and intensity of heating, and the specific ingredients in the food being cooked.
If you are concerned about metal leaching from your pan, it is advisable to use cookware made from materials that are considered safe for cooking, such as stainless steel, cast iron, or certain types of non-stick coatings. Regularly inspecting your cookware for signs of wear or damage and following proper usage and cleaning instructions can also help minimize the risk of metal leaching.