Perls Prussian blue stain
Pronunciation: pĕrlz
Definition: a stain for ferric iron as in hemosiderins, using potassium ferrocyanide in acetic acid or dilute hydrochloric acid followed by a red counterstain such as safranin O or neutral red; various hemosiderins and most mineral irons give a blue-green reaction, whereas nuclei stain red.
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Examples: glitazone, GI cocktail, etc.
