Sakaguchi reaction

Sa·ka·gu·chi re·ac·tion

(sah-kah-gū-chē),
guanidines in alkaline solution develop an intense red color when treated with α-naphthol and sodium hypochlorite; a qualitative test for arginine, free or in a protein.
References in periodicals archive ?
Several analytical methods for GAA and creatine have been described, including use of the Sakaguchi reaction (2), stable-isotope-dilution gas chromatography--mass spectrometry (GC/MS) (3, 4), and HPLC (5).