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![]() In dissolving metal reductions that use an alkali metal dissolved in a primary amine, PTFE may be attacked to some extent. Glass may be viable as an alternative if PTFE is unsuitable. Stir bars are typically coated in PTFE, or, less often, in glass the coatings are intended to be chemically inert, not contaminating or reacting with the reaction mixture they are in. ![]() The stir bar's motion is driven by another rotating magnet or assembly of electromagnets in the stirrer device, beneath the vessel containing the liquid. ![]() Four magnetic stir bars next to a metre stickĪ magnetic stirrer consists of a magnetic bar placed within the liquid which provides the stirring action.
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