Potassium nitrate | potassium | ATP-sensitive potassium channel | potassium carbonate | Sodium hydroxide | Potassium channel | Potassium | sodium hydroxide | Potassium dichromate | Potassium cyanide | Potassium chloride | Potassium alum | Tandem pore domain potassium channel | Potassium thiocyanate | Potassium permanganate | Potassium osmate | potassium cyanide | potassium chloride | Potassium carbonate | Potassium bromide | Potassium bitartrate | Calcium hydroxide | calcium hydroxide | aluminium hydroxide |
Athlete's foot can usually be diagnosed by visual inspection of the skin, but if the diagnosis is uncertain, direct microscopy of a potassium hydroxide preparation of a skin scraping (known as a KOH test) can confirm the diagnosis of Athlete's foot and help rule out other possible causes, such as candidiasis, pitted keratolysis, erythrasma, contact dermatitis, eczema, or psoriasis.
The Sørensen formol titration invented by S. P. L. Sørensen in 1907 is a titration of an amino acid with formaldehyde in the presence of potassium hydroxide.
The test is performed by adding alpha-naphthol and potassium hydroxide to the Voges-Proskauer broth which has been inoculated with bacteria.