| Perls | Max, German pathologist, 1843-1881. See: Perls' Prussian blue stain, Perls' test. (05 Mar 2000) |
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| Perls' Prussian blue stain | <technique> A stain for ferric iron as in haemosiderins, using potassium ferrocyanide in acetic acid or dilute hydrochloric acid followed by a red counterstain such as safranin O or neutral red; various haemosiderins and most mineral irons give a blue-green reaction, while nuclei stain red. (05 Mar 2000) |
| Perls' test | A test for haemosiderin, utilizing Perls' Prussian blue stain. (05 Mar 2000) |